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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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Waveform distortion resulting from adjacent channel crosstalk and from amplitude and phase nonlinearity in channel filters in DSB/SC telemetry link
Pseudorandom FM waveforms for simultaneous range and Doppler shift radar measurements
Waveforms analyzer for mixtures of exponentially damped sine waves, noting application to interferometer curves in plasma wave propagation
System extracts range data from pseudorandom-coded range radar used to track a moving body. Pseudorandom binary waveforms with favorable correlation properties are transmitted and their reflections received and processed. The phase difference between the received and transmitted codes gives an accurate measure of the distance to the moving body.
Frequency-modulated transistor oscillator is used in wideband television transmitters. It provides near-sinusoidal output waveforms and has good frequency stability.
Tracking oscillator consists of modified phase-lock loop which controls voltage-controlled oscillator capable of automatic lock-on and track of periodic input waveform over frequency ratio 500-1. It is used in telemetry and communications systems where large signal fluctuations are encountered.
Buffering technique utilizes nine-bit binary counter and holding register of eight flip-flops. These flip-flops form the memory device that allows precise asynchronous conversion of the digital source data. Counter generates a waveform which is passed through a low pass filter to recover data in analog form.
Two-axis fluxgate miniature magnetometer designed for sounding rockets with mathematical models and Fourier analysis of output waveforms
Regression analysis technique for complex gaseous mixture waveforms in mass spectral analysis
Variable frequency magnetic coupled multivibrator with output signal of constant amplitude and waveform
Photoperiod variation effects on ambulatory primate Cebus albifrons deep body temperature /DBT/, locomotor activity /LMA/ phase relationships and DBT waveform
Exploding bridgewire detonator electrical input requirements, discussing waveform, peak current and time to peak
Linear superposition /LSP/ of isolated pulses in tape recording, discussing validity for multibit waveform synthesis
Continuity equation plasma oscillation, discussing ion current waveform flowing from discharge and implications for periodic astrophysical phenomena
Tonks-Dattner resonances in warm inhomogeneous plasma column, examining kinetic theory for waveform shapes and resonance location
DC-to-sinusoidal inverter employing PWM waveform, analyzing circuit parameters effect on harmonic content
Unsaturating composite magnetic core transformer, consisting of two separate parallel cores designed so impending core saturation causes signal generation, terminates high current spike in converter primary circuit. Simplified waveform, demonstrates transformer effectiveness in eliminating current spikes.
Oscillator generates symmetrical triangular waveform when inverting and noninverting inputs are equal. Oscillator portion of circuit has integrated circuit, high-performance operational amplifier wired as differential integrator, and two silicon controlled rectifiers.