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Voltage detector with trigger based on output load currency

  • US 5,666,043 A
  • Filed: 04/12/1996
  • Issued: 09/09/1997
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. An electronic system, comprising:

  • a linear voltage regulator having a pass transistor with an input terminal connected to receive an unregulated voltage and an output terminal providing load current at a regulated output voltage,a voltage sensor connected across the input and output terminals of said pass transistor to sense the difference between said regulated and unregulated voltages,an alarm circuit including circuitry connected to establish a trigger voltage indicative of the regulator'"'"'s imminent loss of regulation, and a current sensor connected to sense said load current and to adjust said trigger voltage in response to changes in said load current, said alarm circuit connected to activate an alarm signal whenever the voltage sensed by said voltage sensor equals said trigger voltage, anda controller which takes preventive and corrective measures in response to the activation of said alarm circuit.

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