High-efficiency fractional pump
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United States of America Patent
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Oct 25, 2016
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N/A
app pub date -
Jun 26, 2015
filing date -
Jun 26, 2015
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Abstract
Methods and systems for generating voltages greater than a supply voltage are described. In some embodiments, a charge pump system may generate a boosted output voltage greater than the supply voltage using one or more charge pump stages that are arranged in series between the supply voltage and the boosted output voltage. A charge pump stage of the one or more charge pump stages may include a plurality of boosting capacitors that are arranged in series and charged to a charging voltage during a charging phase. During the charging phase, each boosting capacitor of the plurality of boosting capacitors may be charged to a fraction of the charging voltage applied across all of the plurality of boosting capacitors. After the charging phase, the plurality of boosting capacitors may be arranged in parallel and each boosting capacitor of the plurality of boosting capacitors may be boosted during a boosting phase.
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