Delay-locked loop circuit and method thereof for generating...

Details Delay-locked loop circuit and method thereof for generating... Delay-locked loop circuit and method thereof for generating...

2006-08-01

2006-08-01

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S149000, C327S159000, C327S161000

Reexamination Certificate

active

07084682

ABSTRACT:
A delay-locked loop circuit includes a phase frequency detector, a charge pump, a loop filter, a voltage controlled delay line and a coarse lock detector. The phase frequency detector generates an up signal and a down signal corresponding to phase and frequency differences between an input clock signal and a feedback signal. The charge pump receives the up signal, the down signal and a coarse lock detection signal to generate a current signal. The loop filter receives and filters the current signal through a low-pass filter to generate a direct voltage signal. The voltage controlled delay line receives the input clock signal and the direct voltage signal to generate the feedback signal and control signals. The coarse lock detector receives the control signals to generate the initialization signal and the coarse lock detection signal to adjust Td within Tin/2<Td<2×Tin when Td≧2×Tin or Td≦Tin/2.

REFERENCES:
patent: 5642082 (1997-06-01), Jefferson
patent: 5994934 (1999-11-01), Yoshimura et al.
patent: 6326826 (2001-12-01), Lee et al.
patent: 6667643 (2003-12-01), Ko
patent: 6844761 (2005-01-01), Byun et al.
patent: 2003/0053577 (2003-03-01), Wataral
patent: 1294101 (2004-08-01), None
patent: 03-87114 (2003-03-01), None
patent: 03-27866 (2003-04-01), None

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