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POWER ON DETECTION CIRCUIT

  • US 20080218223A1
  • Filed: 02/26/2008
  • Published: 09/11/2008
  • Est. Priority Date: 03/05/2007
  • Status: Active Grant
First Claim
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1. A power on detection circuit comprising:

  • a converting means for converting input voltage into converted current that is proportional to an absolute temperature and outputting the converted current;

    a first connection node supplied with the converted current from the converting means;

    a first current source supplied with the converted current from the first connection node, wherein the first current source generates a flow of first current that is proportional to the absolute temperature and outputs the first current at a value that is the same as the value of the converted current when the input voltage becomes equal to a target voltage;

    a first filter connected to the first connection node; and

    a latching means for outputting and holding a power on detection signal corresponding to a potential at the first connection node that is generated by the first filter when the value of the first current exceeds the value of the converted current.

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