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Image sensor with controllable transfer gate off state voltage levels

  • US 8,174,601 B2
  • Filed: 12/19/2008
  • Issued: 05/08/2012
  • Est. Priority Date: 12/19/2008
  • Status: Active Grant
First Claim
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1. An image sensor comprising:

  • a pixel array comprising a plurality of pixels each having a photosensitive element coupled to a transfer gate; and

    a signal generator coupled to the pixel array;

    wherein the signal generator is configured to generate a transfer gate signal for application to at least one of the transfer gates; and

    wherein the transfer gate signal has at least an on state voltage level and first and second off state voltage levels, wherein the first off state voltage level has a higher magnitude than that of the second off state voltage level, and wherein the transfer gate signal has the second off state voltage level during readout of one or more of the pixels.

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