Linear voltage controlled capacitance circuit

Details Linear voltage controlled capacitance circuit Linear voltage controlled capacitance circuit

2005-02-08

2005-02-08

Pascal, Robert (Department: 2817)

Tuners

Tuner unit directly responsive to voltage and/or current...

Reactance tuning

C333S103000

Reexamination Certificate

active

06853272

ABSTRACT:
A linear voltage controlled capacitance circuit is provided that includes a plurality of MOS varactor pairs. Each MOS varactor pair is operable to receive a first tuning voltage, a second tuning voltage, and a bias voltage unique to the MOS varactor pair. The capacitance circuit is operable to generate a positive tank node signal and a negative tank node signal based on the first and second tuning voltages and the bias voltages. A means to control voltage-to-capacitance gain is also provided to compensate for coarse tuning capacitance change.

REFERENCES:
patent: 3295138 (1966-12-01), Nelson
patent: 5034708 (1991-07-01), Adamian et al.
patent: 5561398 (1996-10-01), Rasmussen
patent: 6724273 (2004-04-01), Jones

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