Phase frequency detector with pulse width control circuitry

Details Phase frequency detector with pulse width control circuitry Phase frequency detector with pulse width control circuitry

2008-05-15

2010-06-01

Nguyen, Hai L (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

C327S003000, C327S007000

Reexamination Certificate

active

07728631

ABSTRACT:
A phase frequency detector comprising a detection circuit and a reset circuit. The phase frequency detector may receive a feedback signal having a predetermined pulse width. The detection circuit may generate a first control signal based on a reference signal, and a second control signal based on the feedback signal. The reset circuit may generate a reset signal used for resetting the detection circuit based on the first control signal, the second control signal, and the feedback signal. The feedback signal may be tied to the generation of the reset signal such that, during a locked state, the pulse width of the second control signal is approximately equal to the pulse width of the feedback signal, which helps reduce the sensitivity of the circuit to nonlinearities.

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“U.S. Appl. No. 12/112,914 Office Action”, filed Jul. 2, 2009 , 10 pages.

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