Phase detector

Details Phase detector Phase detector

1991-03-05

1992-10-20

Pascal, Robert J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328133, 331 25, H03K 500

Patent

active

051572907

ABSTRACT:
A sampling phase detector for a phase locked loop system receives a gate signal derived from the output of a voltage controlled oscillator to enable the phase detector. A reference signal is applied to the phase detector to charge one of two capacitors during the gate period, the capacitor being charged being determined by the state of the reference signal. At the end of the gate period the difference in charge between the two capacitors is transferred to the output of the phase detector as a control voltage signal to correct the output of the voltage controlled oscillator to be in phase wiht the reference signal.

REFERENCES:
patent: 3860954 (1975-01-01), Tsuchiya
patent: 3939434 (1976-02-01), Crosby
patent: 4160217 (1979-07-01), Ohsawa
patent: 4316150 (1982-02-01), Crosby
patent: 4959618 (1990-09-01), Shier

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