Analog implementation of spread spectrum frequency...

Details Analog implementation of spread spectrum frequency... Analog implementation of spread spectrum frequency...

2006-03-21

2006-03-21

Callahan, Timothy P. (Department: 2816)

Oscillators

Electrical noise or random wave generator

C331S019000, C375S213000

Reexamination Certificate

active

07015764

ABSTRACT:
A PLL circuit is described. The PLL circuit includes: a signal generator; and a spread spectrum modulator coupled to the signal generator, where the spread spectrum modulator receives a control voltage as an input and provides a spread spectrum control voltage to the signal generator in response to the control voltage. In one embodiment, the spread spectrum modulator includes at least one selector, where the at least one selector selects a plurality of voltage levels that correspond to a spread mode and percentage of spread for the spread spectrum modulator.

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