PLL control circuit

Details PLL control circuit PLL control circuit

2011-08-23

2011-08-23

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S147000, C327S157000, C327S158000, C327S161000, C375S371000, C375S372000, C375S373000, C375S374000, C375S375000, C331S017000

Reexamination Certificate

active

08004323

ABSTRACT:
A PLL control circuit, which outputs a PLL clock in response to a reference clock, is provided with a frequency adjustment circuit which performs frequency adjustment such that the PLL clock frequency is substantially constant even when the reference clock varies. The frequency adjustment circuit changes a set value in a counter, which determines the PLL clock frequency, in accordance with the variation in the reference clock frequency.

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