Switch capacitance and varactor banks applied to voltage controlled oscillator having constant frequency tuning sensitivity
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United States of America Patent
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Jul 21, 2009
Grant Date -
Jul 24, 2008
app pub date -
Nov 16, 2007
filing date -
Nov 17, 2006
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Abstract
A variable capacitance applied to a voltage controlled oscillator includes a switch capacitance bank including a plurality of controllable capacitor paths for selectively connected between a first node and a second node in parallel; and, a switch variactor bank including a plurality of controllable variactor paths for selectively connected between the first node and the second node in parallel; wherein each controllable variactor path provides a tunable capacitance value according to an input voltage.
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