Phase-locked loops

Details Phase-locked loops Phase-locked loops

2006-11-21

2006-11-21

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C331S016000

Reexamination Certificate

active

07138839

ABSTRACT:
A phase-locked loop (PLL) is disclosed. One embodiment, among others, includes a PLL that provides a control current and varies the control current in proportion to an inverse of N squared. N is the ratio of the output frequency of the PLL system to the reference frequency of the PLL system. The varying of the control current compensates for bandwidth changes of the PLL system.

REFERENCES:
patent: 5831483 (1998-11-01), Fukuda
patent: 6147561 (2000-11-01), Rhee et al.
patent: 6448755 (2002-09-01), Opsahl
patent: 6483391 (2002-11-01), Magoon et al.
patent: 6624707 (2003-09-01), Davis et al.
patent: 6903586 (2005-06-01), Abbasi et al.
patent: 6906565 (2005-06-01), Keaveney

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