Power supply circuit comprising a charge pump circuit and a feedback circuit for the charge pump circuit
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United States of America
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Mar 8, 2022
Grant Date -
Sep 9, 2021
app pub date -
Apr 24, 2018
filing date -
Apr 24, 2018
priority date (Note) -
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Abstract
A charge pump circuit by which fundamental issues involved in the voltage feedback type charge pump circuit have been solved is realized. A power supply circuit includes a charge pump circuit, a feedback circuit feeding an output of the charge pump circuit back to an input of the charge pump circuit, a first current source causing a constant current to flow through the feedback circuit, a MOS transistor element interposed in a middle of the feedback circuit, a resistor element interposed at a position closer to the output of the charge pump circuit than the MOS transistor element in the feedback circuit, a bias circuit applying a constant voltage to a control terminal of the MOS transistor element, and a control section controlling a value of the constant current which the first current source flows through the feedback circuit.
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