Suppressing dielectric absorption effects in sample-and-hold systems
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United States of America Patent
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Nov 24, 2015
Grant Date -
Oct 15, 2015
app pub date -
Aug 28, 2014
filing date -
Apr 14, 2014
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Abstract
Sample-and-hold (S/H) circuitry operating in track and hold phases and having a first S/H circuit with a first hold capacitor at which a first voltage value is maintained in the hold phase, and a dielectric absorption (DA)-suppressing circuit connectable to the first hold capacitor for operating the S/H circuitry in an additional phase after completing the hold phase and before entering the track phase. The DA-suppressing circuit is configured to supply the first hold capacitor, during an operation in the additional phase, with a second voltage value that is negatively correlated with the first voltage value.
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