Clock phase detecting circuit and clock regenerating circuit eac

Details Clock phase detecting circuit and clock regenerating circuit eac Clock phase detecting circuit and clock regenerating circuit eac

1995-11-03

1999-02-02

Tse, Young T.

Pulse or digital communications

Synchronizers

375326, 375332, 375344, 329304, H04L 702, H04L 2722

Patent

active

058675426

ABSTRACT:
The present invention relates to a clock phase detecting circuit and a clock regenerating circuit each arranged in a receiving unit of multiplex radio equipment. The receiving unit of the multiplex radio equipment includes an identifying circuit for identifying a signal obtained by demodulating a multilevel orthogonal modulation signal; a clock regenerating circuit for regenerating a signal identification clock for the identifying circuit to supply the clock to the identifying circuit; an equalizing circuit for subjecting the signal obtained by demodulating a multilevel orthogonal modulation signal to an equalizing process. A clock phase detecting unit detects the phase component of the signal identification clock based on signals input to or output from the equalizing circuit and then supplies the phase component to the clock regenerating circuit. The phase component of a signal identification clock can be certainly detected and accurately adjusted so that the signal identification clock can be regenerated with high accuracy.

REFERENCES:
patent: 4320517 (1982-03-01), Godard et al.
patent: 4692931 (1987-09-01), Ohsawa
patent: 4815103 (1989-03-01), Cupo et al.
patent: 5090027 (1992-02-01), Ohsawa
patent: 5283780 (1994-02-01), Schuchman et al.
patent: 5423085 (1995-06-01), Lim
patent: 5471508 (1995-11-01), Koslov
patent: 5535252 (1996-07-01), Kobayashi
patent: 5661761 (1997-08-01), Iwamatsu

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