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Circuit simulating a diode

  • US 6,060,943 A
  • Filed: 04/14/1998
  • Issued: 05/09/2000
  • Est. Priority Date: 04/14/1998
  • Status: Expired due to Term
First Claim
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1. A circuit with two terminals A and K, which conducts current in one direction from terminal A to terminal K and blocks current in the opposite direction from terminal K to terminal A, comprising:

  • a voltage comparator, having a positive input, a negative input, and an output; and

    a three terminal means for switching current with a source for electrons, a drain for electrons, and a control terminal controlled by a voltage from the output of said voltage comparators;

    said three terminal switching means having an internal resistance associated therewith, and an intrinsic diode associated therewith between said source and said drain; and

    wherein an effective anode of said intrinsic diode is connected to terminal A of said circuit, and an effective cathode of said intrinsic diode is connected to terminal K of said circuit;

    wherein said source is connected to the positive input of said voltage comparator and said drain is connected to the negative input of said voltage comparator; and

    wherein said voltage comparator comprises a bipolar transistor with an emitter, collector and base, two series resistors, and a diode;

    wherein the emitter of said bipolar transistor is the positive input of said voltage comparator, the collector of said bipolar transistor is the output of said voltage comparator, said series resistors are connected between the collector and the base of said bipolar transistor, and said base of said bipolar transistor is further connected to an anode of said diode and a cathode of said diode is the negative input of said voltage comparator.

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