Synthesizable flip-flop based phase-frequency comparator for pha

Details Synthesizable flip-flop based phase-frequency comparator for pha Synthesizable flip-flop based phase-frequency comparator for pha

1997-09-22

1999-08-17

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

327 12, H03L 526

Patent

active

059399015

ABSTRACT:
A method of performing phase-frequency comparison comprising the steps of receiving first and second clock signals; comparing the signals by triggering flip-flop circuits controlled by AND gates, and providing a first output when first signal is in advance of the second signal, and a second output when second signal is advance of the first signal.

REFERENCES:
patent: 4668918 (1987-05-01), Adams
patent: 5315186 (1994-05-01), Baker
patent: 5539345 (1996-07-01), Hawkins
patent: 5631591 (1997-05-01), Bar-Niv

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