Oscillators – Automatic frequency stabilization using a phase or frequency... – Transistorized controls
Patent
1977-04-27
1978-11-21
Kominski, John
Oscillators
Automatic frequency stabilization using a phase or frequency...
Transistorized controls
331 25, H03B 304
Patent
active
041268318
ABSTRACT:
An electronic phase detector circuit includes a variable period sawtooth generator. The sawtooth generator receives digital reference clock signals and in response thereto generates sawtooth-shaped signals having the same period as said reference clock signals. A sample and hold circuit samples the sawtooth-shaped signals in response to one logical state of a sampling clock. A voltage controlled oscillator is coupled to the output of the sample and hold circuit and oscillates at a frequency proportional to the magnitude of the held sample.
REFERENCES:
"COS/MOS Phase Comparator" by R. Feryszka et al., 1973 IEEE Intern. Solid-State Circuit Conference, pp. 184, 185, 222, 223, Feb. 14-16, 1973.
Grossman Rene E.
Kominski John
Sadacca Stephen S.
Texas Instruments Incorporated
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