Binary frequency synthesizer

Details Binary frequency synthesizer Binary frequency synthesizer

1968-06-17

1979-05-22

Moskowitz, Nelson

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331179, 331 36C, H03B 304

Patent

active

041562054

ABSTRACT:
A voltage controlled oscillator has coupled thereto N capacitors in different permutation under control of an N stage binary counter and a counter drive signal enabling the generation of signals having 2.sup.N discrete frequencies. A phase locked loop is employed to stabilize each of the 2.sup.N frequencies. This loop includes a mixer coupled to a harmonic generator and the output of the oscillator. The mixer output is applied to a crystal filter whose output is phase compared with a reference signal and the resultant output is employed to stabilize the oscillator.

REFERENCES:
patent: 2956239 (1960-10-01), Hugenholtz et al.
patent: 3139593 (1964-06-01), Kaminski et al.
patent: 3155919 (1964-11-01), Baxter et al.
patent: 3427561 (1969-02-01), Hamer

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