Method and apparatus for frequency synthesis

Details Method and apparatus for frequency synthesis Method and apparatus for frequency synthesis

1996-12-16

1998-10-20

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

327107, H03L 718

Patent

active

058252134

ABSTRACT:
A method and apparatus for frequency synthesis replaces a conventional divide-by-N counter with a low-power binary ripple counter (108). The method and apparatus employs a difference comparison scheme (114) that provides arbitrarily precise channel spacing, and allows loop sample rate to be selected independent of channel spacing.

REFERENCES:
patent: 3872397 (1975-03-01), Hanneman
patent: 4573176 (1986-02-01), Yeager
patent: 4918403 (1990-04-01), Martin
patent: 5055802 (1991-10-01), Hieatala et al.
patent: 5065408 (1991-11-01), Gillig
patent: 5606736 (1997-02-01), Hasler et al.
"Frequency Synthesizer Design Handbook" by James A. Crawford, Norwood, MA, copyrighted 1994, especially chapter 9.

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