Apparatus and method for phase synchronization

Details Apparatus and method for phase synchronization Apparatus and method for phase synchronization

1975-12-23

1977-07-05

Kominski, John

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

307294, 328155, 331 8, 331 17, H03B 304

Patent

active

040343090

ABSTRACT:
In a phase locking oscillator servosystem, the phase of a voltage controlled oscillator (VCO) is determined by a stored control voltage representative of phase error. Positive and negative constant current sources are switched to an integrator, which provides the control voltage, at times determined by a reference input signal and the fed back VCO output. The current sources are switched simultaneously to or away from the integrator in response to a predetermined condition and are switched individually away from or to the integrator in response to respective input and output signals. The conditions for switching are such that a sufficient time interval for switching circuit operation is established between said individual and simultaneous switchings.

REFERENCES:
patent: 3350658 (1967-10-01), Walker
patent: 3599110 (1971-08-01), Gindi
patent: 3614635 (1971-10-01), LaPine
patent: 3701039 (1972-10-01), Lang et al.
patent: 3939438 (1976-02-01), Taylor

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