Phase detector for reducing noise

Details Phase detector for reducing noise Phase detector for reducing noise

2006-11-07

2006-11-07

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

C331S158000

Reexamination Certificate

active

07132898

ABSTRACT:
The present invention provides a method and an apparatus for reducing noise. The apparatus includes a phase detector adapted to determine a phase difference between a first and a second signal, a first circuit adapted to generate a control signal based upon the determined phase difference, and a second circuit. The second circuit is adapted to receive a third signal, receive a fourth signal, modify the fourth signal based upon the control signal, and provide the third signal and the modified fourth signal to the phase detector as the first and second signals.

REFERENCES:
patent: 5994934 (1999-11-01), Yoshimura et al.
patent: 6377091 (2002-04-01), Williams et al.

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