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Comparator hysteresis circuit

  • US 10,715,117 B1
  • Filed: 08/20/2019
  • Issued: 07/14/2020
  • Est. Priority Date: 08/20/2019
  • Status: Active Grant
First Claim
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1. A comparator circuit, comprising:

  • a signal input terminal;

    an output terminal;

    a first transistor comprising a first terminal coupled to a first hysteresis voltage circuit;

    a second transistor, comprising;

    a first terminal coupled to the signal input terminal; and

    a second terminal coupled to a second terminal of the first transistor;

    a third transistor, comprising;

    a first terminal coupled to a third terminal of the first transistor; and

    a second terminal coupled to a power rail;

    a fourth transistor, comprising;

    a first terminal coupled to a third terminal of the second transistor; and

    a second terminal coupled to the power rail; and

    a timing circuit, comprising;

    an input terminal coupled to the output terminal;

    a first output coupled to a third terminal of the third transistor;

    a second output coupled to a third terminal of the fourth transistor; and

    a delay circuit, comprising;

    an input terminal coupled to the first output; and

    an output terminal coupled to the second output;

    further comprising;

    a fifth transistor, comprising;

    a first terminal coupled to the second terminal of the fourth transistor; and

    a second terminal coupled to a third output of the timing circuit.

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