OPTIMUM STRUCTURE FOR CHARGE PUMP CIRCUIT WITH BIPOLAR OUTPUT
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United States of America Patent
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app pub date -
Sep 1, 2011
filing date -
May 1, 2008
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Abandoned
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Abstract
A charge pump circuit with bipolar output comprises six switches, one transfer capacitor, two storage capacitors and a power source. The gate of the switches have been provided an input voltage collocated with clock signals to control the turn-on time of the switches in order to adjust the level of the output voltage and thus produce bipolar voltage output. The clock signals have been selectively driven by a four-phase signal so as to produce bipolar voltages with magnitudes higher than the input voltage with minimum number of switches and capacitors and also accomplish the highest efficiency.
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