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Method and apparatus for increasing retention time in image sensors having an electronic shutter

  • US 6,522,357 B2
  • Filed: 09/30/1997
  • Issued: 02/18/2003
  • Est. Priority Date: 09/30/1997
  • Status: Expired due to Term
First Claim
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1. In a pixel having an electronic shutter, a method of increasing the retention time of the electronic shutter comprising:

  • a) employing a reset signal to drive a diode node to a predetermined voltage immediately after an integration is complete and during readout, and to substantially inhibit subthreshold leakage from a storage node; and

    b) employing a sample signal to control a pass gate, said sample signal having a state where said sample signal is a negative voltage.

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