Phase locked loop operable over a wide frequency range

Details Phase locked loop operable over a wide frequency range Phase locked loop operable over a wide frequency range

2006-09-19

2006-09-19

Nguyen, Minh (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C331S002000

Reexamination Certificate

active

07109763

ABSTRACT:
A Phase Locked Loop (PLL) that has a substantially constant gain over a wide frequency range. The frequency range over which the PLL operates is divided into a number of frequency sub-ranges. The circuit includes a mechanism for adjusting the loop gain profile as the PLL moves from one frequency sub-range to another. When the PLL switches to a new frequency sub-range, the loop gain profile is adjusted to a pre-established value. Changes of frequency within each sub-range are then accomplished with the loop gain varying within a pre-established range.

REFERENCES:
patent: 5389898 (1995-02-01), Taketoshi et al.
patent: 5648744 (1997-07-01), Prakash et al.
patent: 5686864 (1997-11-01), Martin et al.
patent: 5777520 (1998-07-01), Kawakami
patent: 2002/0135428 (2002-09-01), Gomez
Roland Best,Phase-Locked Loops, ISBN: 0071412018, Jun. 20, 2003.

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