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  • Other Sources  (3,909)
  • SPACE VEHICLES  (2,456)
  • ELECTRONIC COMPONENTS AND CIRCUITS  (1,446)
  • Cell & Developmental Biology
  • Chemistry
  • Deutschland
  • Inorganic Chemistry
  • 1975-1979  (313)
  • 1965-1969  (3,593)
  • 1940-1944  (3)
Collection
Source
Keywords
Publisher
Language
Years
Year
  • 1
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    Malaria in Deutschland (1979)
    In:  Bundesgesundheitsblatt 22, 8-13
    Details
    Publication Date: 1979
    Description: einheimische Malaria als man-made-disease KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; Umweltmedizin ; Infektionskrankheiten
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    BIBLIOGRAPHY INKA BB
  • 2
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    Modular ground-wire connector (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Chassis-mounted module makes it easy to remove and attach ground wires. With module, more ground connections are made in smaller area and no terminal lugs, lockwashers, or locknuts are required. Device also reduces holes that are punched or drilled in chassis for ground connections.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16633 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 477
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    One-third selection for matrix-addressing ferroelectrics (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Automatic-gain-control (AGC) circuit regulates gain of intermediate frequency and radio-frequency signals over wide dynamic range with high linearity and very low phase shift. Potential application include radio and television receivers, signal distribution systems, and test and measurement instruments.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-11993 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 479
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    NASA TECHNICAL REPORTS
  • 4
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    Testing integrated circuits by photoexcitation (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: System for testing integrated circuits uses photoexcitation to determine quality of internal elements inaccessible to electrical tests. Approach prevents direct monitoring of internal operation of circuit by measurements at external terminals and is superior to electron beam scanning due to nondestructiveness.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23943 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 474
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    NASA TECHNICAL REPORTS
  • 5
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    Miniature Ku-Band down converter (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Hybrid circuit serves as receiver front end for 13.75- to 14.0-GHz communications and radar systems. Complete microwave integrated circuit (MIC) assembly is packaged in small hermetically welded, nitrogen-filled aluminum case. Simplicity and size proves useful for lower-frequency wideband applications.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18313 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 473
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    NASA TECHNICAL REPORTS
  • 6
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    Simplified phase detector (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Tanlick sine-wave phase detector gives dc output voltage nearly proportional to phase difference between oscillator signal and reference signal. Device may be used for systems in which signal-to-noise ratio is high.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13395 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 480
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    NASA TECHNICAL REPORTS
  • 7
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    Multichannel VCO needs only one reference (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Frequency stabilizing circuit controls output of multichannel microwave oscillator using passband filters and selector logic to eliminate need for separate crystal diode voltage controlled oscillator (VCO).
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18225 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 471
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    NASA TECHNICAL REPORTS
  • 8
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    Power-switch dV/dt sensing (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Simple means for controlling voltage risetime and powerline noise used three transistors and capacitive feedback. Rate of change of voltage across load is reduced and controlled by circuit. Circuit is useful in situations where large wire bundles are subject to noise and crosstalk due to rapid current switching.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16707 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 329
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    NASA TECHNICAL REPORTS
  • 9
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    Phase-shift array, arbitrary and continuous through 360 deg (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Langley Research Center's Phase-shift array satisfies requirement to phase shift common source signal into array of branch circuits thus simplifying multiple phase control. With system, wiring and assembly are uncomplicated, requiring no switching networks and system can be operated at any desired frequency. Design provides effective solution to problem of multiple shift control.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12272 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 330
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    NASA TECHNICAL REPORTS
  • 10
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    Hall devices improve electric motor efficiency (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Efficiency of electric motors and generators is reduced by radial magnetic forces created by symmetric fields within device. Forces are sensed and counteracted by Hall devices on excitation or control windings. Hall generators directly measure and provide compensating control of anu asymmetry, eliminating additional measurements needed for calibration feedback control loop.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23828 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 325
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    NASA TECHNICAL REPORTS
  • 11
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    Improved metalized polycarbonate capacitor (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Modified metallized polycarbonate-film capacitor withstands 500 thermal cycles between 55 and 125 C replacing conventional devices which typically withstand 10 such cycles.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-25142 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 168
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    NASA TECHNICAL REPORTS
  • 12
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    Improved reader for magnetically-encoded ID cards (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Hybrid demodulator in electronic card reader for magnetically encoded identification cards, accommodates variations in insertion speeds, yet is simpler and less expensive than equivalent all-digital circuits.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13517 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 172
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    NASA TECHNICAL REPORTS
  • 13
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    Transducer with a sense of touch (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Matrix of pressure sensors determines shape and pressure distribution of object in contact with its surface. Output can be used to develop pressure map of objects' surface and displayed as array of alphanumeric symbols on video monitor.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14656 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 173
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    NASA TECHNICAL REPORTS
  • 14
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    Improved silicon/carbon interface for solar cells (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Resistance measurements showing that vitreous graphite remains almost wholly intact even after 1 hour of contact with silicon melt indicates that vitreous carbon may be superior to rubbed-on graphite as interface between ceramic substrate and silicon layer of solar cell.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14421 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 168
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    NASA TECHNICAL REPORTS
  • 15
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    Reliability of imaging CCD's (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Report on reliability of imaging charge-coupled devices (CCD's) is intended to augment rather-meager existing information on CCD reliability. Study focuses on electrical and optical performance tests, packaging constraints, and failure modes of one commercially available device (Fairchild CCD121H).
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-25039 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 14
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    NASA TECHNICAL REPORTS
  • 16
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    Self-calibrating threshold detector for noisy signals (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Single time-shared channel is not seriously affected by temperature and aging. Circuit should also be useful in industrial and consumer equipment. For example, it might be incorporated in telemetry for security systems.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16370 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 10
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    NASA TECHNICAL REPORTS
  • 17
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    Improved InSb photodiode preamplifier circuit (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Integrator compensates for background noise in Fourier spectrometer. Compensation is automatic.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14418 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 9
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    NASA TECHNICAL REPORTS
  • 18
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    Low-backlobe microwave transmitting horn (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: By superimposing two hybrid modes, backlobes of S-band gain calibration horn are down 70 to 80 dB.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14077 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 5
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    NASA TECHNICAL REPORTS
  • 19
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    Wraparound-contact solar cells (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Positive and negative electrical contacts are on back surface of wraparound-contact solar cell. With both terminals on nonilluminated side, cells can be connected back-to-back, and interconnection of many cells can be automated by using printed-circuit techniques. Cells are made by screen-printing layer of dielectric around edge of cell and extending top contact over dielectric to back surface. Wraparound also facilitates application of transparent covers and encapsulants. Efficiencies of cells are in excess of seventeen percent.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-13089 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 3
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    NASA TECHNICAL REPORTS
  • 20
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    Group-delay standards (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Delay-line standards have been tested by three independent laboratories using six different methods. Results are published in report showing delay values obtained from 15-, 30-, and 60-ns cables by different laboratories. Study of potential error sources indicates that reflection errors due to discontinuities at ends of cables are usually small.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13938 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 14
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    NASA TECHNICAL REPORTS
  • 21
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    Low-frequency attenuator circuit (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Circuit uses only single operational amplifier and few passive components to remove background noise from miniature "wristwatch" pulse detector. It can be applied to other systems where background noise is slowly varying, such as ultrasonics, strain-gage sensors, and accelerometers.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: FRC-11012 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 11
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    NASA TECHNICAL REPORTS
  • 22
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    Improved isolation in double-balanced mixers (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Bypass circuit eliminates unwanted leakage in output RF signal. Correction circuit was developed for phase-shift-keyed transmitters. Principle can be adapted to correct leakage in other types of RF circuitry as well.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14415 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 13
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    NASA TECHNICAL REPORTS
  • 23
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    Fiber-optic crossbar switch (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Switch automatically crosspatches optical signals with little loss. Device is furnished with local control and remote control. Local control can be manual from control panel or by computer data bus. In remote control, switch is slaved to remote manual panel computer data bus.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: KSC-11104 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 9
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    NASA TECHNICAL REPORTS
  • 24
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    Fast-response power saver for induction motors (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: With control circuit, induction motors run more efficiently at light loads and respond to sudden load changes. It also anticipates power needs so that motor can respond instantly (to a load applied by a clutch, for example).
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23988 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 6
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    NASA TECHNICAL REPORTS
  • 25
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    Digital correlator with fewer IC's (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Digital correlator requires only few integrated circuits to determine synchronization of two 24-bit digital words. Circuit is easily reduced or expanded to accommodate shorter or longer words and can be utilized in industrial and commercial data processing and telecommunications.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16743 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 481
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    NASA TECHNICAL REPORTS
  • 26
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    Precise matching of diodes (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Two circuit arrangements using ac and dc power source provide low-cost method for matching forward voltage drops of diodes and other semiconductors. Both circuits are simpler and less expensive than conventional, characteristic-curve tracers.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14293 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 475
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    NASA TECHNICAL REPORTS
  • 27
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    Improved driver for capacitive loads (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Bias resistors with large voltage swings are replaced by transistorized current sources and bias currents are reduced to level where beta of devices is accceptable. Innovation has other applications in circuits driving pulsed capacitive loads.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-11609 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 326
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    NASA TECHNICAL REPORTS
  • 28
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    High-Speed, high-power, switching transistor (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Silicon transistor rate for 200 angstroms at 400 to 600 volts combines switching speed of transistors with ruggedness, power capacity of thyristor. Transistor introduces unique combination of increased power-handling capability, unusally low saturation and switching losses, and submicrosecond switching speeds. Potential applications include high power switching regulators, linear amplifiers, chopper controls for high frequency electrical vehicle drives, VLF transmitters, RF induction heaters, kitchen cooking ranges, and electronic scalpels for medical surgery.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-13021 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 320
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    NASA TECHNICAL REPORTS
  • 29
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    Photocapacitive infrared detector and solar cell (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Lightly doped semiconductor device, with transparent insulating layer based on capacitive response to radiant energy, exhibits excellent sensitivities at room temperature.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12345 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 174
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    NASA TECHNICAL REPORTS
  • 30
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    Versatile digital signal processor for dc to dc converters (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Digital signal processor (DSP) for dc-to-dc converters, processes all incoming signals and transmits correct signal to operate power switch.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-13020 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 170
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    NASA TECHNICAL REPORTS
  • 31
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    Computation-saving digital filter (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Two stage digital low-pass filter circuit that averages input over given period and filters average over comparatively slow rate, reduces computation, speed, and word-length requirements. Applications include data preprocessing before entry to central processor.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18057 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 167
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    NASA TECHNICAL REPORTS
  • 32
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    Low-noise current regulator (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Modification of conventional regulator minimizes current drift. Current to be regulated flows through sensing resistor in series with load, producing voltage that is fed into operational amplifier. Other input into amplifier is reference voltage from Zener diode network.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14070 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 12
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  • 33
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    Decision-directed automatic gain control (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Logic circuitry determines whether gain fluctuation are result of signal-strength changes or of atypical strings of like data symbols. Automatic Gain Control (AGC) system provides tight control that is independent of short-term, average, received signal energy and has negligible degrading effect on probability of error for signal.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13639 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 10
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  • 34
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    VHF frequency multiplier (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Low-power step-recovery-diode frequency multiplier generates 361-MHz signal. Diode conducts when ac waveform is positive at its upper terminal. When voltage is negative, diode continues to conduct stored charge in its junction.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13700 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 7
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  • 35
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    Efficient dichroic plate for microwaves (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Signal separator for dual-frequency antennas has interlaced crossed slots, or dipole elements. Plate reflects or transmits more efficiently than conventionally-designed microwave dichroic plates in which elements are not interlaced. Interlaced plate also increases bandwidth of dual-frequency antenna in which it is used.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-12171 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 4
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  • 36
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    Electrical-ground monitor (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Instrument for detecting short circuits monitors ground connections and sounds alarm if out-of-limits condition occurs. Circuit includes electronics that prevent false triggering by high-resistance or capacitive paths and other noise.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18281 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 477
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  • 37
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    Splicing shielded cables (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Simple repair technique retains cable characteristic impedance. Shielded-Cable Splicing Technique retains cable characteristic impedance. Procedure involves splicing inner conductors in staggered pattern, installing jumper braid by heat-shrinking two solder sleeves, and placing insulation sleeve over repaired section and heat-shrinking it. Two possible insulation materials are modified polyvinylidene fluoride and polytetrafluoroethylene.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18297 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 476
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  • 38
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    Arc detector uses fiber optics (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Arc detector for protecting high-power microwave klystron oscillators uses fiber optics connected to remote solid-state light-sensing circuits. Detector is more reliable, smaller, and sensitive than other systems that locate detector in waveguide.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13377 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 472
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    NASA TECHNICAL REPORTS
  • 39
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    Implementing OQASK by using MSK (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Concept simplifies implementation of offset quadrature amplitude-shift-keyed signal when encoding digital information for transmission. Although originally developed for deep-space radio transmission, concept can find applications in various band-width constrained systems and in digital radio communications. Also is particularly useful in high volume data transmission as means of encoding and decoding.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13896 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 331
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  • 40
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    Easily-wired toggle switch (1979)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Crimp-type connectors reduce assembly and disassembly time. With design, no switch preparation is necessary and socket contracts are crimped to wires inserted in module attached to back of toggle switch engaging pins inside module to make electrical connections. Wires are easily removed with standard detachment tool. Design can accommodate wires of any gage and as many terminals can be placed on switch as wire gage and switch dimensions will allow.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18102 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 322
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    NASA TECHNICAL REPORTS
  • 41
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    Automatic gain-balancing circuit (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Energy reaching sensor is collected by telescope, modulated by chopper, spectrally filtered, and simultaneously directed onto two detectors. Gains through multiple signal paths are automatically balanced to 1 part in 10,000. Circuit compensates for slow changes in optical and electrical gains common to gas-filter correlation spectrometers.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12074 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 319
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    Terrestrial photovoltaic measurements (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Revised measurement and calibration procedures are available. ERDA workshop utilized experience gained in solar cell research to define and explore additional measurement needs of photovoltaic community. Interim measurement procedures previously established were revised and published in manual in addition to other procedures.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-13057 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 331
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    Three-function signal generator (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Variable-frequency circuit develops sine square and triangular waveforms. Three-function generator used variable-rate integrator to generate triangular wave and zero-crossing detector to develop square wave. Sine wave generator uses diode matrix to operate on triangular wave, thus with design harmonic distortion in output is less then one percent. By changing values of outboard resistors and capacitors, same design can be used at higher frequencies.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16672 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 328
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  • 44
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    Automatic load sharing in inverter modules (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Active feedback loads transistor equally with little power loss. Circuit is suitable for balancing modular inverters in spacecraft, computer power supplies, solar-electric power generators, and electric vehicles. Current-balancing circuit senses differences between collector current for power transistor and average value of load currents for all power transistors. Principle is effective not only in fixed duty-cycle inverters but also in converters operating at variable duty cycles.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14056 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 324
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    Development of CMOS integrated circuits (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Report documents life cycles of two custom CMOS integrated circuits: (1) 4-bit multiplexed register with shift left and shift right capabilities, and (2) dual 4-bit registers. Cycles described include conception as logic diagrams through design, fabrication, testing, and delivery.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-25121 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 178
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  • 46
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    Offset compensation for A/D converters (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Analog-to-digital (A/D) converter eliminates dc offset in final digitized signal as well as in analog input by using digital feedback for compensation. Circuit could prove useful in data processing applications in which analog-format data are entered at high rates, as in point-of-sale data input systems.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13438 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 176
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    Digital phase shifter (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Device requiring only TTL integrated circuits and single 5-volt power supply, varies phase shift of digital input over approximate range of 15 to 165 deg.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12338 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 171
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  • 48
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    Improved ripple rejection in a PWM (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Line-ripple rejection of pulse-width modulator is more than doubled by substituting exponentially increasing ramp voltage for conventional linear ramp, yet circuit is simplified.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16923 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 177
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  • 49
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    Binary-to-Manchester encoders (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Two circuit system converts 16-bit-word binary encoded data to 24-bit Manchester II code to allow easy interface of flight simulators with aircraft communications equipment.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16546 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 169
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  • 50
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    Pulse-width-modulated attenuator for AGC (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Automatic-gain-control (AGC) circuit regulates gain of intermediate-frequency and radio-frequency signals over wide dynamic range with high linearity and very low phase shift. Device has potential uses in radio and television receivers, signal distribution systems, and test and measurement instruments.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14127 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 483
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  • 51
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    Eliminating gold migration in microcircuits (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Report discusses how effects of moisture and other factors causing bridging between conductors can be prevented. Study details how several factors such as contaminants, large packages, high voltage, narrow conductor spacing and temperature contribute to moisture problems.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18213 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 486
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  • 52
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    Load balancing multimodule switching power converters (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Regulating system individually adjusts duty cycles of modules so that all share load equally, thus, protects individual modules and their components from overload and increases reliability and life expectancy. Converters are alternative to high-power, single unit systems.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13832 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 485
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  • 53
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    Overload protection system (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Overload protection circuit utilizes one circuit for suspending inverter action when load abnormality is detected and second circuit to monitor clearance of abnormality. Device wastes no power during normal operating conditions and responds instantaneously when abnormality is cleared.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13872 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 484
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  • 54
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    CMOS-array design-automation techniques (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Thirty four page report discusses design of 4,096-bit complementary metal oxide semiconductor (CMOS) read-only memory (ROM). CMOSROM is either mask or laser programable. Report is divided into six sections; section one describes background of ROM chips; section two presents design goals for chip; section three discusses chip implementation and chip statistics; conclusions and recommendations are given in sections four thru six.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23762 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 322
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  • 55
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    Z-axis control loop for cathode-ray tubes (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Inexpensive PIN diode detector samples screen brightness between camera frames generating error signal for feedback control of intensity. System was tested by taking flat-field exposures at several density levels over 4 hour period. Results showed processed film density levels varied by less than + or - 10 percent usually centering around + or - 8 percent.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13775 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 324
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  • 56
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    Automatic circuit interrupter (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: In technique, voice circuits connecting crew's cabin to launch station through umbilical connector disconnect automatically unused, or deadened portion of circuits immediately after vehicle is launched, eliminating possibility that unused wiring interferes with voice communications inside vehicle or need for manual cutoff switch and its associated wiring. Technique is applied to other types of electrical actuation circuits, also launch of mapped vehicles, such as balloons, submarines, test sleds, and test chambers-all requiring assistance of ground crew.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16697 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 322
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  • 57
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    Simple digital pulse-programing circuit (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Pulse-sequencing circuit uses only shift register and Exclusive-OR gates. Circuit also serves as date-transition edge detector (for rising or falling edges). It is used in sample-and-hold, analog-to-digital conversion sequence control, multiphase clock logic, precise delay control computer control logic, edge detectors, other timing applications, and provides simple means to generate timing and control signals for data transfer, addressing, or mode control in microprocessors and minicomputers.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13747 , NASA Tech Briefs (ISSN 0145-319X); 3; 3; P. 321
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  • 58
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    Vergleichende Berachtung des Witterungsveralufs in den jahren 1975, 1976 und 1977 (1978)
    In:  Kartoffelbau 29 (1):15-17.
    Details
    Publication Date: 1978
    Description: Zusammenhang Kartoffelertrag und -qualität und Witterungsverlauf KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag) auf den Ernteertrag KATASTER-DETAIL: Delta T (Mai, Juni) + und Delta Nied (Mai, Juni) -, dann Pflanzenentwicklung -; Delta Bodenfeuchte -, dann Wachstum -; Delta T (März, April) 〈 0°C, dann Schäden +;
    Keywords: Deutschland ; 1975-77 ; Kartoffeln ; Ertrag ; Landwirtschaft ; Niederschlag ; Temperatur ; Witterung
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  • 59
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    Direct-reading group-delay measurement (1978)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Technique for measuring modulation signal retardation in microwave components gives direct plot of dependence of delay time on carrier frequency. Recorder sensitivity can be adjusted to give convenient scale factor for group delay. From family of such recordings, it is possible to observe changes in group delay due to temperature, mechanical stress, and other factors.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13909 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P.172
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  • 60
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    Synchronous transfer circuits for redundant systems (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Circuit arrangements for flip-flops, counters, and clock drivers in redundant systems ensure that control is synchronously transferred to surviving components when failure occurs. In addition to original application to spacecraft systems, redundant circuits have terrestrial uses in power generators, solar-energy converters, computers, vehicle controllers, and other systems demanding high reliability.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14162 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P.172
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  • 61
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    Strobe-margin test for plated memory systems (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Technique measures performance of plated-wire memories. Strobe-margin test (SMT) utilizes worst-case testing and automatically gives exact strobe margin. Test is automatic; thus, memory system-level test is superior to tests at component level that use artificial test conditions. Test is significant tool in design and test of plated-wire memory systems. It can rapidly quantify memory-system margin on each production unit and impact of any design changes.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23838 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 171
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  • 62
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    Fast differential analog-to-digital conversion (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Technique first digitizes difference between input and previous conversion. Digitized difference is added to previous digitized value to yield new digital representation of analog input. Output of analog-to-digital converter is useful as digital derivative of input signal.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-12909 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 166
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  • 63
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    Symmetric voltage-controlled variable resistance (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Feedback network makes resistance of field-effect transistor (FET) same for current flowing in either direction. It combines control voltage with source and load voltages to give symmetric current/voltage characteristics. Since circuit produces same magnitude output voltage for current flowing in either direction, it introduces no offset in presense of altering polarity signals. It is therefore ideal for sensor and effector circuits in servocontrol systems.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16685 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P.165
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  • 64
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    Efficient dc-to-dc converter (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Circuit consists of chopper section which converts input dc to square wave, followed by bridge-rectifier stage. Chopper gives nearly-ideal switching characteristics, and bridge uses series of full-wave stages rather than less-efficient half-wave rectifiers found in previous circuits. Special features of full-wave circuit allow redundant components to be eliminated, lowering parts count. Circuit can also be adapted for use as dc-to-dc converter or as combination dc-and-ac source.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: FRC-11014 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 14
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    Digital phase shifter synchronizes local oscillators (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Digital phase-shifting network is used as synchronous frequency multiplier for applications such as phase-locking two signals that may differ in frequency. Circuit has various phase-shift capability. Possible applications include data-communication systems and hybrid digital/analog phase-locked loops.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16695 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 12
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    Simple tool removes IC flat packs (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Handtool has bifurcated handle that can be tightened so that clamping head grips pack securely. Tool easily removes hybrid integrated-ciruit flat packs from printed-wiring boards. It does not damage circuit or board; thus, board can be reused with replacement circuit, and old circuit can be analyzed for faults and, if possible, repaired.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16058 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 12
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    Coaxial isolator has versatile interface (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Approach increases system-packaging flexibility. Isolators are constructed with removable connectors that can be changed to meet user's requirements. Technique reduces development scheduling problems. Isolators can be procured before package design is firm and then readily reconfigured to meet final design requirements. Changes to existing designs to incorporate removable connectors are minimal. Small adapter plates increase size modestly; weight increase is negligible.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16908 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 11
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    Curve tracer checks CMOS IC's (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Conventional transistor curve tracer can speed up failure analysis of CMOS integrated circuits by displaying transfer characteristics while device is subjected to vibration or environmental testing. Failures that show up as change in threshold voltage or transfer characteristics are quickly detected.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-12209 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 9
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    Portable spark-gap arc generator (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Self-contained spark generator that simulates electrical noise caused by discharge of static charge is useful tool when checking sensitive component and equipment. In test set-up, device introduces repeatable noise pulses as behavior of components is monitored. Generator uses only standard commercial parts and weighs only 4 pounds; portable dc power supply is used. Two configurations of generator have been developed: one is free-running arc source, and one delivers spark in response to triggering pulse.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-12886 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 10
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    S-Band complex-weight module for adaptive processing (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: S-band complex weight for adaptive processing is fabricated as microwave integrated circuit. When interfaced with suitable control component, it is potentially capable of producing 25 dB rejection of interface with bandwidth of 500 MHz. Performance inproves with decreased bandwidth. Versatility stems from numerous control methods available in broadening field of adaptive processing.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12197 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 7
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    Nylon screws make inexpensive coil forms (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Standard nylon screws act as coil form copper wire laid down in spiral thread. Completed coil may be bonded to printed-circuit board. However, it is impossible to tune coil by adjusting spacing between windings, technique sometimes used with air-core coils.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16912 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 5
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    Gate-assisted turn-off thyristor (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: 1,000-volt, 200-ampere gate-assisted turn-off thyristor has been developed for power circuits requiring high efficiency, small size, and low weight. Design features include shunted cathode for high dV/dt capability. Cathode in interdigitated with dynamic gate for fast, low-loss switching. Operating frequency exceeds 20 kHz with overall energy dissipation of less that 12 mJ per pulse for typical 20-microsecond half-sine waveform. Device has turn-on time of 2 microseconds and turn-off time as short as 3 microseconds with only 2 amperes of gate drive.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-12535 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 6
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    Adaptive polarization separation experiments (1978)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: Network approach lends itself to simple, direct, analog adaptive control. System constructed and tested successfully with adaptive control yielding residual cross polarization below main channel level for input cross polarization. Canellation network significantly cancels polarization over very wide bandwidths and is adaptively controlled.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12196 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 8
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    Measuring oxide trapping parameters in MOS structure (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: System for controlled injection of electrons or holes into oxide layer of MOS capacitor can be used to measure oxide trapping parameters. Since trapping mechanisms can cause degradation and ultimate failure of MOS elements exposed to ionizing radiation, system can be helpful in predicting device tolerance.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14120 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 4
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  • 75
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    Automated tester for MOS devices (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Automated system rapidly diagnoses MOS integrated circuits. Its programed electronics investigate transistor and cell characteristics to compile data needed for screening. Program can be changed rapidly to alter test procedures, test duration, and precision.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14088 , NASA Tech Briefs (ISSN 0145-319X); 3; 1; P. 3
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    Analyzing CMOS/SOS fabrication for LSI arrays (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Report discusses set of design rules that have been developed as result of work with test arrays. Set of optimum dimensions is given that would maximize process output and would correspondingly minimize costs in fabrication of large-scale integration (LSI) arrays.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23788 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P.172
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    IC implementation of crossbar switches (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Basic switching-element configuration can be expanded to more complex networks by coupling basic building blocks in appropriate way. In all cases, binary addressing of input and output ports is used.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13837 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 170
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    Improved servocontrol system (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: System combines error signal with output of deadband circuit, which offsets any decrease in gain of error circuit for rapid changes in input signal.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-19358 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 167
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    Safe venting for electronic components (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Vented enclosure is made from lightweight metal. Printed-circuit boards are attached to bottom and end bulkheads and to top cover. Airflow cools components indirectly through walls of inner compartment. Flammability and smoke tests demonstrate safety of enclosure.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-18007 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 171
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  • 80
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    Temperature stabilization of microwave ferrite devices (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Thin-film heating element for strip-line circulator is sandwiched between insulation and copper laminations. Disks conform to shape of circulator ferrite disks and are installed between copper-clad epoxy ground planes. Heater design eliminates external cartridges and reduces weight by approximately one-third.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16833 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 169
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  • 81
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    High-power RF switch (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Switch designed for vacuum environments can handle 5 kilowatts of microwave power. Arcing between conductors is prevented by filling gaps with Teflon rather than with inert gas as in conventional switches. Thus, switch is not susceptible to gas leakage, problem faced by conventional switches in high-vacuum applications. Compact three-port switch, developed for microwave radar transmitters aboard spacecraft, is operated by depressing spring-mounted insulating pins that can be remotely actuated by relay. When pin is depressed, it routes microwave signals to selected output port.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14229 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 168
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  • 82
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    Mask and display program (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Program is used to create complex lines, shapes, circles and alpha-numeric characters rapidly and easily, and format them for use on some pattern generation. System is applicable as aid to designers of microelectronics, integrated optics, bubble memories and other devices requiring precise artwork.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23625 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 83
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    Choosing the right connector (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: User design handbook for electrical connection describes general features of representative connectors their shell or body, insert, contacts, coupling, mounting, accession. It discusses electrical performance and mechanical requirements handbook guides designs in selecting electrical connectors according to total system concept.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23785 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 84
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    Brushless tachometer gives speed and direction (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Brushless electronic tachometer measures rotational speed and rotational direction, maintaining accuracy at high or low speeds. Unit is particularly useful in vacuum environments requiring low friction.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23175 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 85
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    Simple, accurate analog divider for low divisor values (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Electronic analog divider circuit employs, over certain range, current-exponential voltage characteristics of diode to obtain better accuracy at low denominator values.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-11881 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 86
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    Twisted shield-pair transmission line (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Lightweight cable forms balanced transmission line and replaces costlier coaxial cables for multiplex-signal transmission. Cable is fabricated with carefully-controlled electrical characteristics and functions without tuning networks at frequencies up to 10 MHz.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16702 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 87
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    Electronic shaft-angle encoder (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Contactless encoder is used at higher angular velocities and for objects lacking integral supporting shaft.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-12832 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 88
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    Charge-coupled differential amplifier (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Device solves problem of differential voltage gain in sampled-data metal-oxide semiconductor, producing gain at any frequency compatible with CCD operation, with low noise, low power, good linearity, and high stability.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12110 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 89
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    Diodes stabilize LED output (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Small-signal diodes are placed in series with light-emitting diodes (LED's) to stabilize LED output against temperature fluctuations. Simple inexpensive method compensates for thermal fluctuations over a broad temperature range. Requiring few components, technique is particularly useful where circuit-board space is limited.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16520 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 90
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    Circuit monitors powerline interruptions (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Simple circuit when combined with pulse detector detects momentary interruptions of 400-cycle ac signal. Circuit has been used during shock and vibration testing of electronic hardware to determine if tests caused interruptions of normal circuit operation.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16763 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 91
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    Digital-signal transfer between isolated systems (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Simple circuit, compatible with CMOS logic, transfers digital signal between electrically isolated systems, without transistors, and minimum of discrete components.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16508 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 92
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    Improved numerical control of oscillator frequency (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Numerically-controlled oscillator is key element in phase-locked loop that generates exact frequency and phase of noise-corrupted input signal. Device is applicable to communication and tracking equipment.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16747 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 93
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    Circuit regulates voltage of dc-dc converter (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Method of regulating voltage-multiplier dc-dc converter utilizes regulating circuit that directly controls only fraction of input voltage, resulting in lightweight, efficient regulator.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-12791 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 94
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    Differential current driver (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Three operational amplifiers in closed-loop configuration, form stable current driver for variable non-ground-reference loads. Circuit uses lower-voltage power supplies than other circuits of this type, and provides constant voltage-to-current gain in low noise configuration. Additional reactive elements could offer frequency compensation for complex loads.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-16475 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 95
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    Primary-controlled ac-to-dc power converter (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Switch operation of power transformer/rectifier dc power supply requires fewer turns of larger wire and regulates output voltage.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MFS-23198 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 96
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    Complementary DMOS/VMOS integrated-circuit-structure (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Complementary metal-oxide-semiconductor (CMOS) structure has relatively high speed, high breakdown voltage, high transconductance and high packing densities.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-12190 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 97
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    Welding single-crystal silicon to molybdenum (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Technique produces reliable bonds of silicon crystal to molybdenum able to withstand continuous operation at 1,000 C in vacuum environment.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13735 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 98
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    Inexpensive silicon sheets for solar cells (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Technique of producing silicon sheets by drawing gridlike or porous graphite gauze through silicon melt is readily adaptable to mass production, making process applicable to inexpensive manufacture of solar cell arrays.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-14069 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 99
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    Low-resistance contacts for GaAlAs/GaAs cells (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Bimetallic contacts utilizing palladium and aluminum, gold, silver, or chromium, are used in reduction of series resistance in GaAlAs/GaAs solar cells, thereby improving cell reliability.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LAR-12201 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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  • 100
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    New process produces high-power Schottky diodes (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Processing procedure using low-temperature platinum silicide, results in successful high-yield fabrication of large-area mesa-geometry Schottky diodes, with reverse breakdown voltages as high as 150 volts and leak currents less than 5 milliamps at 212 F.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: LEW-12749 , NASA Tech Briefs (ISSN 0145-319X); 2; 4; P. 3
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