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Voltage monitoring circuit

  • US 5,796,334 A
  • Filed: 09/19/1996
  • Issued: 08/18/1998
  • Est. Priority Date: 12/07/1994
  • Status: Expired due to Fees
First Claim
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1. A circuit for testing the voltage of a battery source comprising:

  • a microprocessor device having at least an output line and an input line;

    a transistor operatively coupled to the microprocessor;

    a voltage regulating device operatively coupled to the battery source and operatively coupled between the transistor and the output line of the microprocessor;

    the voltage regulating device configured to conduct when a voltage drop present across the voltage regulating device is greater than a predetermined voltage drop;

    the conducting of the voltage regulating device causing the transistor to conduct so as to indicate to the input line of the microprocessor that the voltage drop present across the voltage regulating device is greater than the predetermined voltage drop.

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