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Selectable pixel amplifier for use in a photosensor array

  • US 6,552,324 B1
  • Filed: 12/18/1998
  • Issued: 04/22/2003
  • Est. Priority Date: 12/18/1998
  • Status: Expired due to Term
First Claim
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1. An amplifier suitable for processing image signals, comprising:

  • an input stage having a first differential pair including two p-devices and a second differential pair, complementary to the first differential pair, including two n-devices;

    a first load device for supplying current to the first differential pair and a second load device for supplying current to the second differential pair, the first load device and the second load device being biased at a common bias node;

    self-biasing circuitry for generating a bias at the bias node; and

    means for deselecting the amplifier in response to an external signal, the deselecting means including means for grounding the bias node and means for eliminating current in the self-biasing circuitry in response to the external signal.

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