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  • 1
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    Micromachined Electron-Tunneling Infrared Detectors (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Pneumatic/thermal infrared detectors based partly on Golay-cell concept, but smaller and less fragile. Include containers filled with air or other gas trapped behind diaphragms. Infrared radiation heats sensors, causing gas to expand. Resulting deflections of diaphragms measured by displacement sensors based on principle of electron-tunneling transducers of scanning tunneling microscopes. Exceed sensitivity of all other miniature, uncooled infrared sensors presently available. Expected to include low consumption of power, broadband sensitivity, room-temperature operation, and invulnerability to ionizing radiation.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18413 , Laser Tech. Brief.; 1; 1; P. 86
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    NASA TECHNICAL REPORTS
  • 2
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    Micromachined, Electrostatically Deformable Reflectors (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Micromachined, closed-loop, electrostatically actuated reflectors (microCLEARs) provide relatively simple and inexpensive alternatives to large, complex, expensive adaptive optics used to control wavefronts of beams of light in astronomy and in experimental laser weapons. Micromachining used to make deformable mirror, supporting structure, and actuation circuitry. Development of microCLEARs may not only overcome some of disadvantages and limitations of older adaptive optics but may also satisfy demands of potential market for small, inexpensive deformable mirrors in electronically controlled film cameras, video cameras, and other commercial optoelectronic instruments.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-19154 , NASA Tech Briefs (ISSN 0145-319X); 19; 10; P. 10a
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    NASA TECHNICAL REPORTS
  • 3
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    Improved, Easier-To-Use Tunneling Infrared Sensors (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Designs of electron-tunneling infrared sensors and micromachining processes used to fabricate them modified to increase sensitivity and to simplify operation, adjustment, and associated circuitry. Corrugations, pinholes, and standard packaging incorporated into design. Deflection voltages reduced, and thermal drifts eliminated. Performances exceed those of other commercially available, uncooled infrared sensors. Operation of sensors simplified to such extent, now feasible to ship them to nonexpert users for routine testing and evaluation in their laboratories.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-19087 , NASA Tech Briefs (ISSN 0145-319X); 19; 1; P. 22
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    NASA TECHNICAL REPORTS
  • 4
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    Improved Electromechanical Infrared Sensor (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Proposed electromechanical infrared detector improved version of device described in "Micromachined Electron-Tunneling Infrared Detectors" (NPO-18413). Fabrication easier, and undesired sensitivity to acceleration reduced. In devices, diaphragms and other components made of micromachined silicon, and displacements of diaphragms measured by electron tunneling displacement transducer {see "Micromachined Tunneling Accelerometer" (NPO-18513)}. Improved version offers enhanced frequency response and less spurious response to acceleration.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18560 , NASA Tech Briefs (ISSN 0145-319X); 18; 11; P. 39
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    NASA TECHNICAL REPORTS
  • 5
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    Dual-Element Tunneling Accelerometer (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Improved micromachined tunneling accelerometer contains two deflecting transducer elements: One an elastically supported proof mass having relatively low resonant frequency; other cantilever tunneling transducer that tracks displacement of proof mass and has relatively high resonant frequency ({sup a} 10 kHz). Deflection voltage generated by circuit like described in "Wideband Feedback Circuit for Tunneling Sensor" (NPO-18866). Accelerometers of this type suited for underwater acoustic measurements, detecting vibrations associated with malfunctions in vehicles, detecting seismic signals, monitoring and controlling vibrations in structures, and other applications.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18862 , NASA Tech Briefs (ISSN 0145-319X); 18; 11; P. 36
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    NASA TECHNICAL REPORTS
  • 6
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    Wideband Feedback Circuit For Tunneling Sensor (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Improved feedback circuit designed for use in controlling tunneling displacement transducer. Features include stability and nearly flat frequency response up to 50 kHz. Transducer could be that in scanning tunneling microscope, or any of micromachined electromechanical transducers described in "Micromachined Electron-Tunneling Infrared Detectors" (NPO-18413), "Micromachined Tunneling Accelerometer" (NPO-18513), and "Improved Electromechanical Infrared Sensor" (NPO-18560).
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18866 , NASA Tech Briefs (ISSN 0145-319X); 18; 11; P. 37
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    NASA TECHNICAL REPORTS
  • 7
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    Micromachined Tunneling Accelerometer (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Separation of tunneling electrodes adjusted by varying electrostatic force. Major components of tunneling transducer formed on two silicon chips by microfabrication techniques. Use of electrostatic deflection reduces sensitivity of transducer to thermal drift and simplifies design. Sensitivity suitable for applications in which larger acceleration-sensing instruments required.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18513 , NASA Tech Briefs (ISSN 0145-319X); 17; 11; P. 55
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    NASA TECHNICAL REPORTS
  • 8
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    MMIC Receiver For Water-Vapor Radiometer (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: MMIC receiver puts out signal, frequency of which proportioned to brightness temperature of sky at input frequency of 31 GHz. Miniaturization enhances thermal stability and stability of calibration of water-vapor radiometer. Potential for mass production at relatively low cost. Facilitating widespread use of MMIC water vapor radiometers in meteorology and aviation, deployed at several global sites to improve capability of general circulation models and at airports to monitor icing conditions by measuring supercooled liquid water in clouds.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18713 , NASA Tech Briefs (ISSN 0145-319X); 17; 9; P. 34
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Electron-Tunneling Magnetometer (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Electron-tunneling magnetometer is conceptual solid-state device operating at room temperature, yet offers sensitivity comparable to state-of-art magnetometers such as flux gates, search coils, and optically pumped magnetometers, with greatly reduced volume, power consumption, electronics requirements, and manufacturing cost. Micromachined from silicon wafer, and uses tunneling displacement transducer to detect magnetic forces on cantilever-supported current loop.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18493 , NASA Tech Briefs (ISSN 0145-319X); 17; 9; P. 32
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    NASA TECHNICAL REPORTS
  • 10
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    Superconductive Coplanar-Waveguide Filters (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Coplanar-waveguide microwave low-pass filters based on thin films of high-critical-temperature superconductor YBa2Cu3O7 built and tested. Designed to provide passband of 0 to 9.5 GHz. Dimensions suitable for microwave integrated circuits and chosen to provide fairly stringent test of usefulness and practicality of design and of method of fabrication. Insertion loss less than filter made with copper.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18424 , NASA Tech Briefs (ISSN 0145-319X); 16; 10; P. 26
    Format: text
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    NASA TECHNICAL REPORTS
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