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Circuit to indicate the status of a supply voltage

  • US 6,574,577 B2
  • Filed: 12/13/2000
  • Issued: 06/03/2003
  • Est. Priority Date: 12/13/2000
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a processor to use a first supply voltage to furnish a first indication of a second supply voltage to be received by the processor;

    a voltage regulator to furnish the second supply voltage in response to both the first indication and a second indication that the first supply voltage is valid; and

    a circuit to provide the second indication and regulate a timing of the second indication to prevent the voltage regulator from furnishing the second supply voltage until a predefined interval of time has elapsed after the first supply voltage becomes valid.

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