Method and apparatus for switching frequency of a system clock

Details Method and apparatus for switching frequency of a system clock Method and apparatus for switching frequency of a system clock

2007-08-28

2007-08-28

Cox, Cassandra (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S115000, C327S117000

Reexamination Certificate

active

11163676

ABSTRACT:
A system clock switching apparatus, which includes a clock source for providing a reference clock signal; a frequency divider electrically connected to the clock source for dividing the reference clock signal to produce a frequency-divided signal and a system clock signal; and an enable signal generator electrically connected to the frequency divider for dividing the frequency-divided signal to produce at least one enable signal. The frequency divider switches the frequency of the system clock signal at a time period corresponding to a pulse edge of the frequency-divided signal.

REFERENCES:
patent: 5495452 (1996-02-01), Cha
patent: 5499280 (1996-03-01), Wilson et al.
patent: 6040828 (2000-03-01), Park
patent: 6049236 (2000-04-01), Walden
patent: 6160566 (2000-12-01), Maeda
patent: 2003/0090302 (2003-05-01), Hanamori
patent: 2004/0100310 (2004-05-01), Kurakane

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