Digital phase detector and charge pump system reset and balanced

Details Digital phase detector and charge pump system reset and balanced Digital phase detector and charge pump system reset and balanced

1999-06-24

2000-10-31

Le, Dinh T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327148, 327 7, 327142, 331 1A, H03L 7089

Patent

active

061408530

ABSTRACT:
A digital phase detector and charge pump circuit system reset circuit and method resets a digital phase detector according to the charge outputs between the charge pump circuits and a following loop filter. The sensing circuitry emulates portions of the circuitry of the digital phase detector and charge pump circuit system and minimizes deadband time. Current mirror portions of the charge pump circuit alternate between p-channel and n-channel devices to regularize output voltage levels produced by the charge pump circuit system.

REFERENCES:
patent: 4814726 (1989-03-01), Byrd et al.
patent: 5233314 (1993-08-01), McDermott et al.
patent: 5485125 (1996-01-01), Dufour

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