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Simulated battery logic testing device

  • US 7,764,066 B2
  • Filed: 01/20/2009
  • Issued: 07/27/2010
  • Est. Priority Date: 06/03/2005
  • Status: Expired due to Fees
First Claim
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1. A simulated battery test device for checking the operation of a battery charging circuit and logic circuitry comprising:

  • an operational amplifier that generates a low simulated battery voltage in response to a battery low control signal that is used to adjust a reference voltage to said low simulated battery voltage, and that generates a battery open condition in response to a battery open control signal that is used to turn off said operational amplifier;

    a resistor that is connected in-line with said battery charging circuit;

    a comparator connected across said resistor that measures a voltage drop across said resistor that is representative of a current charging signal generated by said battery charging circuitry, and that generates a voltage difference signal that is proportional to said voltage drop across said resistor;

    an analog-to-digital converter that generates a digital signal, using a reference voltage, said digital signal being representative of a magnitude of said current charging signal.

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