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Battery charger

  • US 6,208,148 B1
  • Filed: 02/03/1994
  • Issued: 03/27/2001
  • Est. Priority Date: 05/05/1993
  • Status: Expired due to Term
First Claim
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1. A battery charger including:

  • a voltage detection circuit for monitoring a voltage of a battery being charged and for providing sequentially a plurality of voltage values for the voltage of the battery being charged measured at a selected interval;

    a comparator connected to compare each voltage value with a preceding voltage value within the sequence to determine a difference between each voltage value and the preceding voltage value;

    a detector outputting an end of charge detection signal when said difference between a voltage value and a last preceding voltage value reflects a decrease of at least a threshold amount or when the voltage value does not exceed the last preceding voltage value.

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