Regulated charge pump circuit
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United States of America Patent
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Jan 9, 2018
Grant Date -
N/A
app pub date -
Jun 30, 2016
filing date -
Jul 8, 2015
priority date (Note) -
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Abstract
Aspects of the disclosure provide a circuit for providing a power supply. The circuit includes a control signal generator circuit and a switch network circuit. The control signal generator circuit is configured to generate a control signal with a voltage level that is a function of an output voltage on a load capacitor. The switch network circuit is coupled with the load capacitor and a flying capacitor to form a charge pump circuit. The switch network circuit is configured to charge the flying capacitor in a charge stage and pump the flying capacitor in a pump stage to generate the output voltage on the load capacitor. The switch network circuit is configured to provide a pump control voltage to the flying capacitor during the pump stage. The pump control voltage has a voltage level that is adjusted based on the control signal to maintain the output voltage to be stable.
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