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Symmetrical controlled switching circuit

  • US 5,118,963 A
  • Filed: 11/29/1989
  • Issued: 06/02/1992
  • Est. Priority Date: 11/29/1989
  • Status: Expired due to Fees
First Claim
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1. A switching circuit for controlling a plurality of external load circuits, comprising:

  • a first voltage interconnection;

    a second voltage interconnection, a first portion of each of said first and second interconnections being connectable to a first load and a first power supply, a second portion of each of said first and second voltage interconnections being connectable to a second load and a second power supply;

    a regulator connected between said first voltage interconnection and said second voltage interconnection between said first and second portions of said first and second voltage interconnections, said regulator being connected by first and second parallel conductive paths to said first voltage interconnection, said first conductive path comprising a semiconductive switch, said second conductive path comprising a means for providing a voltage differential between said first voltage interconnection and said regulator;

    a transducer connected between said regulator and said second voltage interconnection, said transducer having an output which is switchable between first and second conditions in response to a stimulus, said output being connected to said semiconductive switch to cause said semiconductive switch to assume a conductive state in response to said first condition and to assume a nonconductive state in response to said second condition;

    a first switching device connected between said first and second voltage interconnections at both said first portions and operatively coupled to said first conductive path to connect said first and second voltage interconnections in electrical communication with each other in response to electrical current passing through said first conductive path; and

    a second switching device connected between said first and second voltage interconnections at said second portion and operatively coupled to said second conductive path to connect said first and second voltage interconnections in electrical communications with each other in response to electrical current passing through said second path.

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