Phase adjustment method and apparatus for use in a clock recover

Details Phase adjustment method and apparatus for use in a clock recover Phase adjustment method and apparatus for use in a clock recover

1992-03-26

1993-09-21

Kuntz, Curtis

Pulse or digital communications

Spread spectrum

Direct sequence

375106, 375119, H04L 700, H04L 2536, H04L 2540, H03D 324

Patent

active

052475441

ABSTRACT:
A clock recovery circuit employs a method of and apparatus for adjusting the phase of a recovered clock signal. The clock signal is recovered from a received input signal. The clock recovery circuit generates a sampling clock signal which is synchronous with the received signal. Additionally, the phase adjustment apparatus generates at least two error signals which indicate the quality of the received signal at different sampling phases. The smallest error signal is referred to as the minimum error value. Each error signal is compared to the minimum error value, creating a corresponding normalized error magnitude signal. Each normalized error magnitude signal is processed to determine the desired phase of the sampling clock signal. Dependent upon the processing of the normalized error magnitude signals, the phase of the sampling clock signal is either shifted or maintained until the next sampling point. The phase of the sampling clock signal is maintained during periods indicating poor received input signal quality.

REFERENCES:
patent: 4376309 (1983-03-01), Fenderson et al.
patent: 4667333 (1987-05-01), Butcher
patent: 4815103 (1989-03-01), Cupo et al.
patent: 4953185 (1990-08-01), Goode
patent: 5048060 (1991-09-01), Arai et al.

Affiliated with

Also associated with

Rating

Phase adjustment method and apparatus for use in a clock recover does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase adjustment method and apparatus for use in a clock recover, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase adjustment method and apparatus for use in a clock recover will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1056139