Apparatus and method for operating a phase-locked loop circuit

Details Apparatus and method for operating a phase-locked loop circuit Apparatus and method for operating a phase-locked loop circuit

2007-05-30

2009-12-15

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S017000, C331S025000, C331S057000

Reexamination Certificate

active

07633347

ABSTRACT:
An apparatus and method for operating a phase-locked loop circuit are disclosed. The phase locked loop circuit includes a plurality of resistive elements and a plurality of capacitive elements that are distributed in a charge pump, a loop filter and a voltage controlled oscillator. The plurality of resistive elements have a plurality of resistances that vary in proportion to each other. The plurality of capacitive elements have a plurality of capacitive elements that vary in proportion to each other. A damping factor of the phase-locked loop circuit is maintained substantially constant by the plurality of resistive elements and the plurality of capacitive elements.

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Extended European Search Report received in European Application No. 07015328.3 dated Aug. 13, 2008 (10 pages).

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