Apparatus and method of controlling operation frequency in...

Details Apparatus and method of controlling operation frequency in... Apparatus and method of controlling operation frequency in...

2007-07-17

2009-08-11

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

C327S121000, C327S149000, C327S158000, C327S291000, C327S299000

Reexamination Certificate

active

07573312

ABSTRACT:
A frequency multiplier increases the frequency of an external clock and outputs a high-frequency external clock. A period determinator determines whether or not a predetermined period of the external clock elapses and outputs a period determination signal. A frequency selector selectively transmits the external clock or the high-frequency external clock to a clock input buffer under the control of a power-up signal and the period determination signal.

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