Amplifier shared between two columns in CMOS sensor

Details Amplifier shared between two columns in CMOS sensor Amplifier shared between two columns in CMOS sensor

2002-08-28

2008-12-30

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S302000, C348S303000, C348S308000, C348S332000, C250S208100

Reexamination Certificate

active

07471324

ABSTRACT:
The present invention provides an improved shared amplifier circuitry and method of operation which minimizes offset and column to column fixed pattern noise during a read out operation. The circuit improves the consistency of the pixel to pixel output of the pixel array and increases the dynamic range of the pixel output and saves chip area. This is accomplished by simultaneously sampling and storing charge accumulated signals from a first and a second desired pixel from a respective first and second column. The circuit amplifies the first charge signal and then samples and amplifies the reset signal of the first desired pixel and subsequently outputs the amplified first charge signal and the reset signal. Then the circuit amplifies the second charge signal and the reset signal of the first desired pixel and subsequently outputs the amplified second charge signal and the reset signal.

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