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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Volt-ampere characteristic anomaly observed in cylindrical Langmuir probe on Explorer 17 satellite, discussing applications to plasma sheath, ion temperature and mass distribution
Negative resistance and switching in amorphous B thin films observed in Ti electrodes, noting volt-ampere characteristics
Analog-to-digital converter converts 10 volt full scale input signal into 13 bit digital output. Advantages include high sensitivity, linearity, low quantitizing error, high resistance to mechanical shock and vibration loads, and temporary data storage capabilities.
Thyratron, capable of being operated as a rectifier and a voltage-reference tube, was constructed and tested for 1000 hours at temperatures to 800 degrees C. With current levels at 15 amps and peak voltages of 2000 volts and frequencies at 6000 cps, tube efficiency was greater than 97 percent.
Volt-ampere characteristics improvement and life testing of electrodes for hydrogen oxygen fuel cells
SERT 2 mercury vapor fed hollow cathode operated in bell jar, determining volt-ampere characteristics and flow rates for plasma diagnostics
Reproducibility of thermionic converters performance, comparing volt-ampere characteristics with reservoir and collector temperature
Preignition volt-ampere curves for thermionic cesium diodes exhibiting nonsaturation characteristics under low temperature and electron-rich emission conditions
Sodium niobate dielectric doped with barium titanate has potential application in integrated circuits with high packing densities and voltage levels below 5 to 8 volts.
Counter for aircraft counts and records number of times the strain at a point in a structural member exceeds each of four preset levels. Counter uses 28 volt dc power supply, metallic resistance strain gage bridge as sensor, integrated and solid state circuits for signal processing, and electromechanical counters for data storage and readout.
Volt-ampere characteristics and maximum power distributions of lithium-diffused p-n solar cells
SERT 2 mercury vapor fed hollow cathode operated in bell jar, determining volt-ampere characteristics and flow rates for plasma diagnostics
Circuit with minimum number of components provides stable outputs of 2 to 8 volts at frequencies of .001 to 100 kHz. Oscillator exhibits low power consumption, portability, simplicity, and drive capability, it has application as loudspeaker tester and audible alarm, as well as in laboratory and test generators.
Reliable random access multiplexer is controlled and operated over two twisted-pair telephone lines at distances of 5.6 to 8.0 km with control signals of less than 10 volts rms. Technique adapts to any process or environmental control system where data source is necessary.
Electronic circuit for monitoring excessive ripple voltage on dc power lines senses voltage variations from few millivolts to maximum of 10 volts rms. Instrument is used wherever power supply fluctuations might endanger system operations or damage equipment. Device is inexpensive and easily packaged in small chassis.
Measuring conductivity, freezing point, and volt-ampere characteristics of halide melts for battery feasibility
Electronic circuitry is devised to raise low level signal from platinum film type transducer to sufficient amplitude to trigger oscilloscope or time interval counter. Circuit can be used wherever it is necessary to raise level of low amplitude, low impedance positive polarity pulse source to a 5 or 6 volt level.
Signal conditioner was designed which can condition dc signals over range of + or - volts. It is lighter, has lower initial and maintenance costs, and higher reliability than conventional discrete circuit designs. System incorporates linear integrated circuits in conjunction with hybrid, thin film circuit technology to achieve high degree of circuit miniaturization.