System to vary capacitance based on a control signal

Details System to vary capacitance based on a control signal System to vary capacitance based on a control signal

2005-04-19

2005-04-19

Sircus, Brian (Department: 2836)

Electrical transmission or interconnection systems

Capacitor

Reexamination Certificate

active

06882064

ABSTRACT:
Some embodiments provide a plurality of capacitors coupled in parallel, a plurality of capacitor switches, each one of the capacitor switches coupled in series with a respective one of the plurality of capacitors, one or more biasing circuits to independently set each of the plurality of capacitor switches to one of a reset voltage, a first threshold voltage, and a second threshold voltage, and a plurality of control switches, each of the control switches to couple and to decouple a respective one of the plurality of capacitor switches to and from a control voltage.

REFERENCES:
patent: 4259746 (1981-03-01), Sandstedt
patent: 4893087 (1990-01-01), Davis
patent: 4973922 (1990-11-01), Embree et al.
patent: 5600187 (1997-02-01), El-Hamamsy et al.
patent: 6552569 (2003-04-01), Wert
patent: 6574288 (2003-06-01), Welland et al.
patent: 6621893 (2003-09-01), Elzur
patent: 6754147 (2004-06-01), Hsu et al.

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