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Low voltage level power-up detection circuit

  • US 6,320,809 B1
  • Filed: 07/05/2000
  • Issued: 11/20/2001
  • Est. Priority Date: 07/05/2000
  • Status: Expired due to Term
First Claim
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1. A power-up detection circuit comprising:

  • a transistor for providing a voltage output signal when a first voltage is applied to a supply terminal, said transistor having a gate for receiving a second voltage generated from said first voltage; and

    a biasing circuit for applying said second voltage to said gate, said biasing circuit being connected to receive said first voltage from said terminal and including a resistance circuit for dividing said first voltage applied to said terminal to produce said second voltage;

    wherein said resistance circuit is variable for providing different voltage levels for said second voltage.

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