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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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Multiple chip custom block, MIC construction is used to fabricate an ultracompact, low-power astable multivibrator. The design provides a multivibrator that free runs, eliminating lockup, is triggerable, pulling into synchronization with an external signal source, and permits design flexibility for controlling the frequency variations with temperature.
Development of a simple circuit using two Zener diodes and five resistors, which provides a temperature-sensitive voltage to drive the astable multivibrator, is described.
Improved circuit provides greater reliability and load-carrying capabilities for monostable multivibrator.
Variable frequency magnetic multivibrator operates in a full wave fashion to provide a stable square wave output over wide variations in temperature and power supply potential. This invention is applicable in clocks and control devices.
Schmitt trigger multivibrator circuit, capable of astable, monostable or bistable operation, incorporates an input circuit in conjunction with a Schmitt trigger circuit. The circuits form two output signal levels, are useful in switching circuit applications, initiates oscillations, and forms highly unsymmetrical wave forms.
Multivibrator circuit provides a low-frequency sine wave output without using a low-frequency power transformer or filter components. This circuit, utilizing two transistors and a magnetic core, represents a reduction in complexity, size, and weight over similar units.
Circuit for linear voltage amplitude to pulse width conversion using controlled unijunction monostable multivibrator
Circuit design and performance of transistorized multivibrator
Extra-long monostable multivibrator employing bistable semiconductor switch to allow charging of timing circuit
Variable frequency magnetic coupled multivibrator with temperature compensated frequency control circuit
Variable frequency magnetic coupled multivibrator with output signal of constant amplitude and waveform
Improved semiconductor multivibrator circuit which approaches 100 percent efficiency
One shot multivibrator circuit for producing long duration output pulses
Monostable multivibrator for producing output pulse widths with positive feedback NOR gates
Integrable multivibrators insensitive to supply voltages and temperature variations, determining pulse widths from passive components
Method is described for designing crystal oscillator which has frequency and symmetry stability suitable for system-clock-generators used in spacecraft data systems. Simple multivibrator is used in which timing capacitor is replaced by a crystal.
Nondissipatively regulated variable frequency DC TO DC converter with variable on time and variable off time
Circuit provides a pulse source of constant frequency with a duty cycle that is adjustable by an external input signal. It could serve as a switching mode voltage regulator or as a switching source for control systems.