2-phase threshold detector based circuits
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United States of America Patent
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Apr 30, 2013
Grant Date -
Nov 22, 2012
app pub date -
May 20, 2011
filing date -
May 20, 2011
priority date (Note) -
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Abstract
A switched capacitor circuit includes a threshold detector to generate a threshold detection signal when a difference between first and second input signals crosses a predetermined level. A coarse current source produces a coarse ramp. A series sampling capacitor samples a coarse output voltage when the threshold detector indicates a first threshold crossing. The sampling capacitor is connected in series with a fine current source producing a fine ramp.
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