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  • 1
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    CCD correlation techniques (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Two CCD techniques were discussed for performing an N-point sampled data correlation between an input signal and an electronically programmable reference function. The design and experimental performance of an implementation of the direct time correlator utilizing two analog CCDs and MOS multipliers on a single IC were evaluated. The performance of a CCD implementation of the chirp z transform was described, and the design of a new CCD integrated circuit for performing correlation by multiplication in the frequency domain was presented. This chip provides a discrete Fourier transform (DFT) or inverse DFT, multipliers, and complete support circuitry for the CCD CZT. The two correlation techniques are compared.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Conf. on Charge-Coupled Device Technol. and Appls.; 6 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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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
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Low power, compact charge coupled device signal processing system (1980)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A variety of charged coupled devices (CCDs) for performing programmable correlation for preprocessing environmental sensor data preparatory to its transmission to the ground were developed. A total of two separate ICs were developed and a third was evaluated. The first IC was a CCD chirp z transform IC capable of performing a 32 point DFT at frequencies to 1 MHz. All on chip circuitry operated as designed with the exception of the limited dynamic range caused by a fixed pattern noise due to interactions between the digital and analog circuits. The second IC developed was a 64 stage CCD analog/analog correlator for performing time domain correlation. Multiplier errors were found to be less than 1 percent at designed signal levels and less than 0.3 percent at the measured smaller levels. A prototype IC for performing time domain correlation was also evaluated.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA-CR-3215 , REPT-08-78-49
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Spectral analysis using CCDs (1976)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Charge-coupled devices (CCDs) are ideally suited for performing sampled-data transversal filtering operations in the analog domain. Two algorithms have been identified for performing spectral analysis in which the bulk of the computation can be performed in a CCD transversal filter; the chirp z-transform and the prime transform. CCD implementation of both these transform algorithms is presented together with performance data and applications.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: Midwest Symposium on Circuits and Systems; Aug 16, 1976 - Aug 17, 1976; Milwaukee, WI
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Programmable charge-coupled device /CCD/ correlator for pattern classification (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The potential use of charge coupled device (CCD) programmable digital/analog correlators for multispectral data classification is discussed. CCD digital/analog correlator technology and the experimental evaluation of a 32-stage 4-bit test device are presented. The design of an IC for use in a multispectral classification system for 16 sensors and 8 bit accuracy is reviewed.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: Smart sensors; April 17, 18, 1979; Washington, D. C.
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Applications of charge-coupled device transversal filters to communication (1975)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: The paper discusses the computational power of state-of-the-art charged-coupled device (CCD) transversal filters in communications applications. Some of the performance limitations of CCD transversal filters are discussed, with attention given to time delay and bandwidth, imperfect charge transfer efficiency, weighting coefficient error, noise, and linearity. The application of CCD transversal filters to matched filtering, spectral filtering, and Fourier analysis is examined. Techniques for making programmable transversal filters are briefly outlined.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: International Conference on Communications; Jun 16, 1975 - Jun 18, 1975; San Francisco, CA
    Format: text
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    NASA TECHNICAL REPORTS
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