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Voltage regulator circuit

  • US 5,959,816 A
  • Filed: 02/24/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 09/24/1993
  • Status: Expired due to Term
First Claim
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1. A unit having a regulator circuit, the unit comprising:

  • a glass unit having at least one glass pane;

    a material associated with the glass pane;

    a circuit input;

    a circuit output for coupling to the material and applying a signal to the material for heating the material;

    a circuit control element coupled between the input and the output for controlling the signal applied to the output;

    a sensing circuit coupled to the output for sensing a signal applied to the material and integrating the signal for determining if the integration exceeds a defined limit over time; and

    a trigger circuit coupled to the sensing circuit for causing the circuit control element to modify the signal applied to the material when the sensing circuit senses a signal which exceeds the defined limit.

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