SEARCH · Engineering Papers
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Circuit development for improving low input voltage conversion regulation from primary /radioisotopic fueled thermoelectric generators/ and secondary /battery/ sources
High power low saturation voltage silicon switching transistor
Low voltage capacitor discharge firing circuit to initiate hot bridgewire squibs for spacecraft applications
Voltage breakdown in low pressure regions and resulting electrical corona
AC induced voltages in Nb and Nb-Zr superconducting wires, measuring I-V curves and energy loss per cycle
Conventional and composite grid designs tested with low voltage Kaufman thrustor
Design procedure for low voltage capacitor discharge circuits to trigger electroexplosive devices in aerospace vehicles
Mass spectra of isotopically labeled aliphatic ketones at low voltage, showing deuterium scrambling among alyphatic carbon atoms
Single cell batteries with low input voltage conversion regulation considered as long life energy storage system, noting circuit integration
Isolated, multiple output voltage dc-to-dc converter provides power for television transmitter used in space vehicles. The isolation is accomplished by using a single-end switching transformer circuit. The converter is completely solid state.
Spectrographic method determines individual stainless steel components in molten bismuth-42 w/o tin eutectic to determine the solubility of Type 304 stainless steels. It utilizes the high sensitivity and precision of the spark-ignited, low-voltage ac-arc excitation of samples rendered homogeneous by dissolution.
Voltage controlled oscillator /VCXO/ generates a center frequency of 100 MHz with low phase noise. VCXOs at this and lower frequencies are applied to phase-lock-loop detection systems used in tracking receivers and telemetry systems.
Integrated circuit senses when the voltage level has exceeded or is below a given reference level. The circuit, consisting of a differential amplifier, an SCR, and a pair of zener diodes, is useful for overload detection and monitoring power supplies.
Simplified solid-state circuit provides a closely regulated dc voltage from an unregulated dc source. It eliminates the undesirable loading effect of the emitter-base current of a transistor used in an error-sensing circuit of a regulated dc power supply.
Low-melting resistor connected in series with the load protects the circuit against current overloads. It protects test subjects and patients being monitored by electronic instrumentation from inadvertant overloads of current, and sensitive electronic equipment against high-voltage damage.
Generator has an improved circuit for generating a controllable, high voltage spark having a constant known energy output. It can be used for testing the flash and ignition characteristics of nonmetallic materials in a controlled gas environment.
Sputtering technique uses pulsed high voltage direct current to the object to be plated and a radio frequency sputtered film source. Resultant film has excellent adhesion, and objects can be plated uniformly on all sides.
Proton induced voltage breakdowns in polymeric materials