Frequency synthesizer with digital phase selection

Details Frequency synthesizer with digital phase selection Frequency synthesizer with digital phase selection

2006-06-27

2006-06-27

Nguyen, Minh (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

C327S114000

Reexamination Certificate

active

07068081

ABSTRACT:
Systems, methodologies, media, and other embodiments associated with making a frequency change through frequency synthesis and digital selection of out-of-phase synthesized signals are described. One exemplary system embodiment includes a locked loop logic (e.g., phase locked, delay locked) that may receive a reference clock signal, process the reference clock signal into signals with different phases, and make those signals available to a selection logic. The exemplary system may also include a state logic that stores frequency divisors that facilitate selecting and tracking output signals provided by the selection logic. The exemplary system may also include a phase logic that stores output signal phase data associated with computing, describing, and/or selecting an output signal.

REFERENCES:
patent: 5059924 (1991-10-01), JenningsCheck
patent: 5394116 (1995-02-01), Kasturia
patent: 5970110 (1999-10-01), Li
patent: 6157694 (2000-12-01), Larsson
patent: 6249189 (2001-06-01), Wu et al.
patent: 6583674 (2003-06-01), Melava et al.
patent: 6844785 (2005-01-01), Chiang et al.

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