System to vary capacitance based on a control signal
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United States of America Patent
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Apr 19, 2005
Grant Date -
Dec 23, 2004
app pub date -
Jun 23, 2003
filing date -
Jun 23, 2003
priority date (Note) -
Expired
status (Latency Note)
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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.
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