DLL circuit

Details DLL circuit DLL circuit

2009-05-29

2010-10-26

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S149000, C327S161000

Reexamination Certificate

active

07821313

ABSTRACT:
A DLL circuit includes an input circuit generating a synchronization reference signal, a first delay unit delaying the synchronization reference signal to generate a plurality of delayed synchronization reference signals and selecting one of the delayed synchronization reference signals, a timing offset circuit adjusting a synchronization position of the delayed synchronization reference signal to generate a signal to be synchronized, a phase comparison circuit comparing phase of the synchronization reference signal with that of the signal to be synchronized, a first control circuit selecting an output signal of the first delay unit, a second delay unit delaying the synchronization reference signal or the signal to be synchronized to generate a plurality of delayed signals, a configuration information memory storing configuration information, and a second control circuit selecting an output signal of the second delay unit if the comparison result of the phase comparison circuit is within a predetermined range.

REFERENCES:
patent: 6970028 (2005-11-01), Ishikawa
patent: 7035366 (2006-04-01), Tokutome et al.
patent: 7626432 (2009-12-01), Yamane
patent: 7728640 (2010-06-01), Yamane
patent: 2008/0252343 (2008-10-01), Yamane
patent: 2004-260663 (2004-09-01), None

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