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Sense amplifier for high-density imaging array

  • US 5,844,265 A
  • Filed: 07/11/1996
  • Issued: 12/01/1998
  • Est. Priority Date: 07/11/1996
  • Status: Expired due to Fees
First Claim
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1. A sense amplifier comprising:

  • an input node;

    an output node;

    an input transistor having a gate connected to the input node, a source connected to a first supply voltage rail, and a drain;

    a cascode transistor having a gate connected to a cascode node, a source connected to the drain of the input transistor, and a drain connected to the output node; and

    a load transistor having a gate connected to a bias node, a drain connected to the output node, and a source connected to a second supply voltage rail;

    wherein the w/l ratio of the input transistor and the cascode transistor is much greater than the w/l ratio of the load transistor.

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