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Switchable output voltage converter

  • US 5,084,666 A
  • Filed: 10/23/1990
  • Issued: 01/28/1992
  • Est. Priority Date: 10/23/1990
  • Status: Expired due to Fees
First Claim
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1. An incrementally variable DC power supply, having a terminal adapted to selectively provide a regulated DC output voltage from a DC input voltage, comprising:

  • control circuit means operatively connected to a reference voltage and to said DC input voltage, said control circuit means including means to control said regulated DC output voltage in response to any one of a plurality of values of said reference voltage;

    output selection circuit means operatively connected to said reference voltage and to at least one of a plurality of digital logic inputs, having high and low levels said output selection circuit means including means to selectively alter the value of said reference voltage in response to said digital logic inputs, said reference voltage altering means being free of mechanical switching elements and comprising at least one switching transistor; and

    means to selectively and alternatively engage and disengage any one of a plurality of electrical loads connected to said terminal, said selective engagement and disengagement means being simultaneously with the means to selectively alter the value of the reference voltage, responsive to changes in the logic level of said digital logic inputs.

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