Delay-locked loop device capable of anti-false-locking

Details Delay-locked loop device capable of anti-false-locking Delay-locked loop device capable of anti-false-locking

2006-03-21

2006-03-21

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

C327S158000, C331SDIG002

Reexamination Certificate

active

07015725

ABSTRACT:
A delay-locked loop device capable of anti-false-locking includes a voltage control delay circuit including a plurality of delay units in a series for generating a delayed phase according to a reference phase and a control voltage; a phase detector coupling to the voltage control delay circuit for generating a control signal according to a lock indication signal, the reference phase, and the delayed phase; a charge pump coupling to the phase detector for generating the control voltage to the voltage control delay circuit according to the control signal; and a lock detector coupling to the voltage control delay circuit for generating the lock indication signal for the phase detector according to output phases of each delay unit of the voltage control delay circuit.

REFERENCES:
patent: 5180993 (1993-01-01), Dent
patent: 5530383 (1996-06-01), May
patent: 5909130 (1999-06-01), Martin et al.
patent: 5969576 (1999-10-01), Trodden
patent: 6844761 (2005-01-01), Byun et al.
patent: 6963234 (2005-11-01), Bidenbach

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