Delay locked loop capable of performing reliable locking...

Details Delay locked loop capable of performing reliable locking... Delay locked loop capable of performing reliable locking...

2007-03-13

2007-03-13

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S155000, C327S161000

Reexamination Certificate

active

10983504

ABSTRACT:
A delay locked loop capable of performing a reliable locking operation is provided that includes a phase controller, which controls a phase of a reference clock signal in response to first and second phase control signals, and a phase detector, which compares the phase of the reference clock signal to a phase of a feedback clock signal and outputs the first and second phase control signals to match the phase of the reference clock signal and the phase of the feedback clock signal, where the phase detector keeps the length of a detecting window constant in response to a current signal despite changes in external voltage, temperature, and the manufacturing process.

REFERENCES:
patent: 5179303 (1993-01-01), Searles et al.
patent: 5847616 (1998-12-01), Ng et al.
patent: 6028490 (2000-02-01), Komatsu
patent: 6815990 (2004-11-01), Lee
patent: 2002/0067913 (2002-06-01), Ando et al.
patent: 2002-300030 (2002-10-01), None
patent: 2001-0098685 (2001-08-01), None

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