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Circuit and method to facilitate threshold voltage extraction and facilitate operation of a capacitor multiplier

  • US 6,806,762 B2
  • Filed: 10/15/2001
  • Issued: 10/19/2004
  • Est. Priority Date: 10/15/2001
  • Status: Active Grant
First Claim
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1. A system for extracting a threshold voltage, comprising:

  • a first MOSFET stage including an input operative to receive a first input current, and a gate node electrically coupled to the input thereof;

    a second MOSFET stage including an input operative to receive a second input current and a gate node; and

    a voltage divider coupled between the input of the second MOSFET stage and the gate node of the first MOSFET stage, the voltage divider also having an intermediate output node coupled to the gate node of the second MOSFET stage, such that an output voltage at the input of the second MOSFET stage is approximately equal to the threshold voltage for at least one of the first and second MOSFET stages.

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