Active pixel sensor with single pixel reset
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United States of America Patent
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Mar 9, 1999
Grant Date -
N/A
app pub date -
Mar 21, 1997
filing date -
May 22, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An active pixel image sensing device that provides uniform integration periods and either independent pixel reset, row, pixel reset, or column pixel reset, having a plurality of photodetector elements arranged in a matrix of rows and columns, each of the photodetectors having a transfer gate operatively connecting the photodetectors to a floating diffusion and further including a reset and clamp and sample function. A reset transistor for each row of photodetectors having a gate that can have a predetermined voltage applied to reset each row, and a column reset transistor for each column of photodetectors having a gate that can have a predetermined voltage applied to reset each column. This allows for uniform integration periods and a signal sample and clamp circuit for the entire array of photodetectors.
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