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High-swing cascode current mirror

  • US 5,680,038 A
  • Filed: 06/20/1996
  • Issued: 10/21/1997
  • Est. Priority Date: 06/20/1996
  • Status: Expired due to Term
First Claim
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1. A high-swing current mirror comprising:

  • a cascode current source having first andsecond bias terminals and an output terminal;

    a bias circuit comprising;

    a transistor M1 having a gate, source and drain, with the drain being coupled to the gate;

    a transistor M2A having a gate and source coupled to the gate and source, respectively, of the transistor M1 and having a drain;

    a transistor M2B having a gate and drain coupled to one another and to the second bias terminal and having a source coupled to the drain of the transistor M2A; and

    a transistor M3A having a gate and drain coupled to the first bias terminal and a source coupled to the sources of the transistors M1 and M2A.

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