Method for controlling active pixel elements and active...

Details Method for controlling active pixel elements and active... Method for controlling active pixel elements and active...

2006-09-21

2008-03-25

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C348S294000, C348S297000, C348S302000, C348S308000

Reexamination Certificate

active

07348534

ABSTRACT:
An active pixel element of an image sensor array includes a sensor, a transfer transistor, a reset transistor, and a source follower. There is a column-read transistor positioned in each column of the image sensor array for controlling the read signals. When the sensor is reset, all column-read transistors are turned off while the transfer transistor and the reset transistor are turned on. When a reset signal is read and all column-read transistors are still turned off, the reset transistor is turned on so as to generate the same reset reference voltage when the sensor is reset. In this way, there is no difference in reset reference voltage between each column and between each row for the image sensor array.

REFERENCES:
patent: 2005/0205761 (2005-09-01), Shah

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