NASA NTRS · 19700000435
Wide-range tracking oscillator generates phase and frequency coherent output
Abstract
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.
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Howard, J. R.. 1970-09-01. Wide-range tracking oscillator generates phase and frequency coherent output. https://ntrs.nasa.gov/citations/19700000435
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