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Reference current generator with small temperature dependence

  • US 6,348,832 B1
  • Filed: 04/17/2000
  • Issued: 02/19/2002
  • Est. Priority Date: 04/17/2000
  • Status: Expired due to Term
First Claim
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1. A reference current generator having temperature dependence, comprising:

  • a first PMOS transistor, a first NMOS transistor;

    a first diode, wherein said first PMOS transistor, said first NMOS transistor and said first diode are in series connected and coupled between a power reference and a potential reference;

    a second PMOS transistor having a gate terminal connected to a gate of said first PMOS transistor and thereto connected to a drain terminal of said second PMOS transistor;

    a second NMOS transistor having a gate terminal connected to a gate of said first NMOS transistor and thereto connected to a drain terminal of said first NMOS transistor;

    a plurality of resistors each having a respective temperature coefficient and having a respective resistance, among of said resistors having temperature coefficients thereof average to about 1/T0 for reducing the temperature dependence of the reference current generator, wherein said T0 is an operation temperature for which said resistance is measured; and

    a second diode, said second PMOS transistor, said second NMOS transistor, said second diode, said second diode, and said plurality of resistors are in series connected between said power reference and said potential reference.

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