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Analog delay cells for the power supply of an RFID tag

  • US 8,669,801 B2
  • Filed: 06/06/2012
  • Issued: 03/11/2014
  • Est. Priority Date: 06/10/2011
  • Status: Active Grant
First Claim
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1. A delay circuit for a power supply comprising:

  • a power supply input and a power supply output;

    a ramp circuit coupled between the power supply input and ground; and

    a transistor having a current path coupled between the power supply input and the power supply output, and a control node coupled to an intermediate node of the ramp circuit,wherein the ramp circuit comprises a capacitor and a bandgap (BGAP) current source in series connection.

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