Clock synchronizing circuit

Details Clock synchronizing circuit Clock synchronizing circuit

H - Electricity

04

L

H04L 7/00 (2006.01) H03L 1/02 (2006.01) H03L 7/093 (2006.01) H03L 7/14 (2006.01)

Patent

CA 2114268

A clock synchronizing circuit comprises a voltage controlled oscillator (VCO) for producing an output signal whose oscillation frequency changes in response to control signals. A phase comparator compares a phase of an input signal and a phase of the output signal to thereby generate a phase difference signal. A filter filters the phase difference signal to thereby output a filtered phase difference signal. A frequency synchronizing circuit responsive to the filtered phase difference signal generates a first compensation signal for controlling a frequency of the output signal. A phase synchronizing circuit responsive to the filtered phase difference signal generates a second compensation signal for controlling a phase of the output signal. A signal supplying circuit feeds the first and second compensation signals as said control signals.

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