Phase-locked loop integrated circuits having dual feedback...

Details Phase-locked loop integrated circuits having dual feedback... Phase-locked loop integrated circuits having dual feedback...

2009-10-01

2011-11-08

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S148000

Reexamination Certificate

active

08054115

ABSTRACT:
Phase-locked loop (PLL) integrated circuits according to embodiments of the invention provide dual feedback control. The first feedback control utilizes a conventional phase locking scheme that passes a feedback clock signal to an input of a phase-frequency detector (PFD). The second feedback control utilizes an automatic frequency calibrator that evaluates a frequency of an output of a voltage-controlled oscillator (VCO) relative to a locked frequency detected during calibration and provides separate calibration control to a charge pump.

REFERENCES:
patent: 6829318 (2004-12-01), Kawahara
patent: 7079616 (2006-07-01), Castiglione et al.
patent: 7095287 (2006-08-01), Maxim et al.
patent: 7356111 (2008-04-01), Dean
patent: 7659783 (2010-02-01), Tai
patent: 7701270 (2010-04-01), Wyatt et al.
patent: 7812650 (2010-10-01), Song et al.
patent: 7868808 (2011-01-01), Caplan et al.
patent: 2002/0176188 (2002-11-01), Ruegg et al.
patent: 2005/0212605 (2005-09-01), Puma
patent: 2006/0158262 (2006-07-01), Robinson et al.
patent: 2010/0085092 (2010-04-01), Shin
patent: 2010/0283517 (2010-11-01), Wadhwa et al.

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