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Full-Wave Charge Pump With Low-Voltage Startup

  • US 20170155379A1
  • Filed: 11/30/2016
  • Published: 06/01/2017
  • Est. Priority Date: 11/30/2015
  • Status: Active Grant
First Claim
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1. A charge pump, comprising:

  • a charge pump circuit comprised of transistor pairs arranged in stages, wherein the charge pump circuit is configured to receive an input voltage and generate a DC output voltage whose magnitude is larger than magnitude of the input voltage;

    an energy storage device configured to receive and store voltage from the charge pump circuit, where the energy storage device allows current flow such that turn-on voltage of the transistors in the charge pump circuit is not reduced significantly; and

    a switching circuit interfaced with control terminals of the transistors in the charge pump circuit and, in response to leakage current through the transistors in the charge pump circuit resulting from an input voltage to the charge pump circuit, switches on and off the transistors in the charge pump circuit while voltage stored by the energy storage device is below the threshold voltage of the transistors in the charge pump circuit.

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