Wideband delay-locked loop (DLL) circuit

Details Wideband delay-locked loop (DLL) circuit Wideband delay-locked loop (DLL) circuit

2011-05-03

2011-05-03

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S149000

Reexamination Certificate

active

07936195

ABSTRACT:
A wideband delay-locked loop (DLL) circuit includes an internal clock signal generating unit providing an internal control signal by selecting and interpolating between two clock delay signals during a primary phase locking operation. The internal clock signal may be modified by a secondary phase locking operation if more delay is required to phase lock the internal clock signal to an external clock signal. A phase detection/control circuit generates various control signals based on a phase comparison of the internal clock signal and the external clock signal.

REFERENCES:
patent: 7327176 (2008-02-01), Takai et al.
patent: 7812654 (2010-10-01), Kim et al.
patent: 7830189 (2010-11-01), Abe
patent: 7839191 (2010-11-01), Takai
patent: 2008/0100356 (2008-05-01), Lee
patent: 2010/0182058 (2010-07-01), Gomm
patent: 2010/0226188 (2010-09-01), Kim et al.
patent: 1020030056461 (2003-07-01), None
patent: 1020040102641 (2004-12-01), None
patent: 1020060084275 (2006-07-01), None

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