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Two-phase bootstrapped CMOS switch drive technique and circuit

DC
  • US 6,118,326 A
  • Filed: 11/06/1997
  • Issued: 09/12/2000
  • Est. Priority Date: 11/06/1997
  • Status: Expired due to Term
First Claim
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1. A circuit that produces a control voltage for a transistor switch that receives an input voltage on a source terminal, the circuit comprising:

  • a first input that receives the input voltage;

    a second input that receives a bias voltage;

    a voltage storage element;

    a first switch that connects the voltage storage element to sample the bias voltage during a first of first and second time internals;

    a second switch that connects the voltage storage element to increase the sampled voltage by the input voltage to the control voltage during the second time interval, while maintaining the control voltage less than a breakdown voltage of the transistor switch; and

    a third switch that connects the voltage storage element to provide the control voltage to the transistor switch during the second time interval.

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