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ONE-TRANSISTOR PIXEL ARRAY WITH CASCODED COLUMN CIRCUIT

  • US 20120001236A1
  • Filed: 06/30/2011
  • Published: 01/05/2012
  • Est. Priority Date: 06/30/2010
  • Status: Active Grant
First Claim
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1. A pixel array, comprising:

  • a plurality of pixels, wherein each pixel comprises;

    one and only one chemically-sensitive field-effect transistor (ChemFET), having a floating gate, and a source coupled to a fixed voltage line; and

    a cascoded device, coupled to the drain of the ChemFET;

    wherein the cascoded device is configured to counteract a gate-to-drain parasitic capacitance of the ChemFET.

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