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Driver circuit for sinking current to two supply voltages

  • US 5,296,765 A
  • Filed: 03/20/1992
  • Issued: 03/22/1994
  • Est. Priority Date: 03/20/1992
  • Status: Expired due to Term
First Claim
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1. A driver circuit, having an input node for receiving a control signal and an output node, said circuit comprising:

  • first means for pulling a voltage on said output node to a first supply voltage when a voltage on said input node is positive with respect to said voltage on said output node;

    second means for pulling a voltage on said output node to a second supply voltage when said voltage on said output node is positive with respect to said second supply voltage and when a voltage on said input node is negative with respect to said voltage on said output node; and

    third means for pulling a voltage on said output node to a third supply voltage when said voltage on said output node is negative with respect to said second supply voltage and when a voltage on said input node is negative with respect to said voltage on said output node,wherein said first supply voltage is positive with respect to said second supply voltage, and wherein said third supply voltage is negative with respect to said second supply voltage.

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