Active pixel sensor with single pixel reset
First Claim
1. An active pixel image sensing device 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 a row reset signal that can be applied to reset the floating diffusion for each row, the improvement comprising:
- a reset transistor operatively connected to a column reset signal that can be applied in conjunction with the row control signal to reset any individual floating diffusion in a given row.
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Accused Products
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.
78 Citations
16 Claims
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1. An active pixel image sensing device 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 a row reset signal that can be applied to reset the floating diffusion for each row, the improvement comprising:
a reset transistor operatively connected to a column reset signal that can be applied in conjunction with the row control signal to reset any individual floating diffusion in a given row. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of making an active pixel image sensing device 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 a row reset signal that can be applied to reset the floating diffusion for each row, the improvement comprising the steps of:
providing a reset transistor that is operatively connected to a column reset signal that can be applied in conjunction with the row control signal to reset any individual floating diffusion in a given row. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
Specification