CMOS image sensor permitting increased light sensitivity...

Details CMOS image sensor permitting increased light sensitivity... CMOS image sensor permitting increased light sensitivity...

2005-12-13

2005-12-13

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C348S301000

Reexamination Certificate

active

06974944

ABSTRACT:
An image sensor, includes: a plurality of pixel circuits, each of which comprises a photoelectric conversion element, a first transistor controlled by a detection signal generated by the photoelectric conversion element, and a second transistor connected to the first transistor and controlled by a select line; and a common amplifier circuit, which is provided commonly to the plurality of pixel circuits, and which has a third transistor connected in parallel to the first transistor, and a current circuit for supplying current to the first and third transistors, wherein an amplifying circuit, which amplifies the detection signal, is formed by the first transistor in a pixel circuit selected by the select line, and by the third transistor in th common amplifier circuit.

REFERENCES:
patent: 6310571 (2001-10-01), Yang et al.
patent: 6717616 (2004-04-01), Afghahi et al.

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