Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Patent
1975-03-07
1976-06-08
Grimm, Siegfried H.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
310 98, 331 9, 331 25, 331107A, 331179, 333 30R, 333 72, H03B 304, H03B 530
Patent
active
039626520
ABSTRACT:
A highly stable variable frequency oscillator is disclosed which employs a ultitap surface acoustic wave device as a frequency standard. A feedback path which includes a voltage controlled switch for selecting a desired output tap drives a differential amplifier, phase detector, low pass filter, voltage controlled oscillator and phase splitter for driving the input tap of the surface acoustic wave device. Various additional feedback paths are also employed. The variable frequency signal is taken from the output of the voltage controlled oscillator.
REFERENCES:
patent: 3582540 (1971-06-01), Adler et al.
patent: 3648081 (1972-03-01), Lean et al.
patent: 3775696 (1973-11-01), Garth
patent: 3818382 (1974-06-01), Holland et al.
Carbin Francis A.
Zarin Alvin
Bowers Arthur L.
Edelberg Nathan
Gibson Robert P.
Grimm Siegfried H.
The United States of America as represented by the Secretary of
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