Clock supply circuit for supplying a processing clock signal...

Details Clock supply circuit for supplying a processing clock signal... Clock supply circuit for supplying a processing clock signal...

2005-09-06

2005-09-06

Perveen, Rehana (Department: 2116)

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

Multiple or variable intervals or frequencies

C713S500000

Reexamination Certificate

active

06941485

ABSTRACT:
A clock supply circuit capable of supplying clock signals having different frequencies to processing circuits, simplifying the circuit configuration, and realizing a reduction of the power consumption only by using a low frequency external oscillator, wherein a reference clock is multiplied by a multiplication circuit to generate a multiplied clock, the multiplied clock is divided by a predetermined division ratio to generate a clock signal having a desired constant frequency by a receiving clock generating circuit, furthermore, a DSP clock generating circuit generates a clock signal having a variable frequency according to a processing load of a DSP in accordance with a judgment result of a load judgment circuit, so it is possible to supply a clock signal maintained synchronization with received signal as well as a clock signal having a frequency variably controlled in accordance with the processing load.

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patent: 6188258 (2001-02-01), Nakatani
patent: 6519706 (2003-02-01), Ogoro
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patent: 6654406 (2003-11-01), Kim et al.
patent: 6721892 (2004-04-01), Osborn et al.
patent: 6728926 (2004-04-01), Kakemizu et al.

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