PLL circuit leakage compensation circuit for generating a...

Details PLL circuit leakage compensation circuit for generating a... PLL circuit leakage compensation circuit for generating a...

2006-10-03

2006-10-03

Kinkead, Arnold (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S034000, C331S17700V, C331S17700V, C331S1170FE, C331S1170FE

Reexamination Certificate

active

07116177

ABSTRACT:
A PLL circuit with a series coupling of a charge pump, a loop filter and a voltage-controlled oscillator generating an output frequency (f), the voltage-controlled oscillator including tunable devices controlled by a first control signal generated by the loop filter, the PLL circuit includes a leakage compensation circuit for generating a leakage compensation signal to modify a control of the voltage-controlled oscillator, the leakage compensation signal being indicative for a leakage current in the tunable devices of the voltage-controlled oscillator.

REFERENCES:
patent: 5659588 (1997-08-01), Fiedler
patent: 6054903 (2000-04-01), Fiedler
patent: 6717475 (2004-04-01), McCarthy
patent: 1 237 283 (2002-04-01), None
Frequency Synthesizer Design Handbook, by James A. Crawford, Artech House, 1994, p. 177.

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