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Rectifier circuit and RFID tag

  • US 7,424,266 B2
  • Filed: 11/08/2005
  • Issued: 09/09/2008
  • Est. Priority Date: 11/09/2004
  • Status: Active Grant
First Claim
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1. A rectifier circuit comprising:

  • a first MOS transistor;

    a first capacitor configured to connect between a gate and a source of the first MOS transistor;

    a switching circuit configured to supply a bias voltage to the first capacitor in response to a control signal;

    a second MOS transistor configured to imitate the first MOS transistor;

    a second capacitor configured to imitate the first capacitor;

    a dummy switching circuit configured to supply the bias voltage to the second capacitor in response to the control signal; and

    a generating circuit configured to generate the control signal based on a potential of the second capacitor.

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