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  • 1
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    Gas-Sensing Flip-Flop Circuits (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Gas-sensing integrated circuits consisting largely of modified static random-access memories (SRAMs) undergoing development, building on experience gained in use of modified SRAMs as radiation sensors. Each SRAM memory cell includes flip-flop circuit; sensors exploit metastable state that lies between two stable states (corresponding to binary logic states) of flip-flop circuit. Voltages of metastable states vary with exposures of gas-sensitive resistors.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-19389 , NASA Tech Briefs (ISSN 0145-319X); 19; 9; P. 48
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Nonvolatile Ionic Two-Terminal Memory Device (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Conceptual solid-state memory device nonvolatile and erasable and has only two terminals. Proposed device based on two effects: thermal phase transition and reversible intercalation of ions. Transfer of sodium ions between source of ions and electrical switching element increases or decreases electrical conductance of element, turning switch "on" or "off". Used in digital computers and neural-network computers. In neural networks, many small, densely packed switches function as erasable, nonvolatile synaptic elements.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-17621 , NASA Tech Briefs (ISSN 0145-319X); 14; 5; P. 20
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Current-Collecting Grids For AMTEC Electrodes (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Photodeposition or sputter deposition of refractory metal in grid pattern on solid electrolyte of alkali-metal thermoelectric converter (AMTEC) prior to deposition of electrode decreases electronic resistance and increases current and peak power of converter significantly. Concept also applicable to other devices that include electrically conductive, porous electrodes; such as solid-state fuel cells and solid-state electrolysis cells.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18540 , NASA Tech Briefs (ISSN 0145-319X); 18; 3; P. 36
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Electrodes For Alkali-Metal Thermoelectric Converters (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Combination of thin, porous electrode and overlying collector grid reduces internal resistance of alkali-metal thermoelectric converter cell. Low resistance of new electrode and grid boosts power density nearly to 1 W/cm2 of electrode area at typical operating temperatures of 1,000 to 1,300 K. Conductive grid encircles electrode film on alumina tube. Bus wire runs along tube to collect electrical current from grid. Such converters used to transform solar, nuclear, and waste heat into electric power.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-17159 , NASA Tech Briefs (ISSN 0145-319X); 13; 11; P. 24
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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