Integrated circuit monitor for storage battery voltage and temperature

  • US 5,339,018 A
  • Filed: 11/17/1992
  • Issued: 08/16/1994
  • Est. Priority Date: 06/30/1989
  • Status: Expired due to Fees
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First Claim
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1. An apparatus for monitoring storage battery voltage as a function of storage battery temperature, comprising:

  • means for sensing the storage battery voltage; and

    comparator means, including band-gap reference cell means, having at least two transistors operated at different current densities, for sensing the storage battery temperature and for providing a reference voltage threshold that varies with variations in the storage battery temperature by combining a voltage that changes in a manner proportional to changes in temperature with a voltage that changes in a manner complementary to changes in temperature, for comparing the storage battery voltage sensed by the means for sensing with the reference voltage threshold.

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