FOUR-PHASE CHARGE PUMP CIRCUIT
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United States of America Patent
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Issued Date -
Jan 7, 2016
app pub date -
Oct 22, 2014
filing date -
Jul 7, 2014
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Abandoned
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Abstract
A four-phase charge pump circuit including an output stage and multiple boosting stages is provided. The multiple boosting stages are coupled to the output stage in series, and each of the multiple boosting stages is driven by four-phase clock signals. The output stage is driven by two clock signals of the four-phase clock signals and outputs a positive boosted voltage, and thereby the four-phase charge pump circuit is a positive charge pump circuit. Each of the boosting stages includes two branch charge pumps, and each of the two branch charge pumps includes a main pass transistor and a pre-charge transistor. The main pass transistors and the pre-charge transistors of the boosting stages are disposed on an identical deep doped region.
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