Phase detector for high speed clock recovery from random binary

Details Phase detector for high speed clock recovery from random binary Phase detector for high speed clock recovery from random binary

1998-04-02

2000-03-07

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

327 12, H03D 1300

Patent

active

060345543

ABSTRACT:
An improved phase detector for detecting the difference between an information signal and a clock signal is provided. The information signal is divided into a plurality of N divided signals, the data rate of each divided signal being the data rate of the information signal divided by N. A plurality of N variable width difference pulse signals are generated each being responsive to the phase difference between a divided signal and the clock signal. One or more fixed width reference pulse signals having a width proportional to one-half clock period are also generated. A phase error signal is then provided in response to the N difference pulse signals and the one or more reference pulse signals. Preferably, N is equal to 2.sup.M, where M is a positive integer greater than or equal to one.

REFERENCES:
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Thomas H. Lee, "A 155-Mhz Clock Recovery Delay--and Phase-Locked Loop", IEEE Journal of Solid-State CircuitsDec. 27, (1992), No. 12, New York, US pp. 1736-1746.

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