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Voltage sharing circuit

  • US 4,900,955 A
  • Filed: 06/19/1989
  • Issued: 02/13/1990
  • Est. Priority Date: 05/06/1987
  • Status: Expired due to Fees
First Claim
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1. A voltage sharing circuit, comprising:

  • a first active electronic device having at least first, second and third electrodes and having a predetermined voltage rating;

    a second active electronic device having at least first, second and third electrodes and having a predetermined voltage rating, said first electrode of said second active electronic device being coupled to said second electrode of said first active electronic device;

    means for receiving an input signal only at said third electrode of said first active electronic device;

    means for providing an output signal at said second electrode of said second active electronic device, the voltage of said output signal being greater than said voltage rating of said first active electronic device;

    a supply voltage source coupled to said second electrode of said second active electronic device;

    a first source of fixed reference voltage;

    a first impedance device coupling said second and third electrodes of said second active electronic device; and

    a first diode intermediate said first source of fixed reference voltage and said third electrode of said second active electronic device to limit the maximum voltage with respect to ground potential on said third electrode of said second active electrode device.

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