Phase detector for a programmable clock synchronizer

Details Phase detector for a programmable clock synchronizer Phase detector for a programmable clock synchronizer

2005-03-08

2005-03-08

Mis, David (Department: 2817)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

C327S002000

Reexamination Certificate

active

06864722

ABSTRACT:
A phase detector in a programmable clock synchronizer for effectuating data transfer between first circuitry disposed in a first clock domain and second circuitry disposed in a second clock domain. The phase detector includes a series of flip flops disposed in parallel that sample the second clock signal with both a rising edge of the first clock signal and a falling edge of the first clock signal. By tracking movement in one-to-zero or zero-to-one transitions in the sampled clock signals, the phase detector is operable to determine the phase difference between the first and second clock signals.

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