High-resolution varactors, single-edge triggered digitally...

Details High-resolution varactors, single-edge triggered digitally... High-resolution varactors, single-edge triggered digitally...

2006-11-13

2010-12-28

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

C331S17700V

Reexamination Certificate

active

07859343

ABSTRACT:
A digitally controlled oscillator (DCO) includes a pulse generator for generating a pulse signal upon an edge of a trigger signal, and at least one delay circuit coupled to delay the pulse signal generated by the pulse generator. The pulse generator is coupled to receive one of the delayed pulse signal from the at least one delay circuit and an enable signal as the trigger signal. A digitally controlled varactor (DCV) includes a transistor having a gate, a source, a drain, and a substrate, wherein at least one of the gate, the source, the drain, and the substrate is coupled to receive one of two or more voltages, wherein at least one of the two or more voltages is not a power supply voltage or ground.

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