Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2005-09-07
2008-12-02
Yam, Stephen (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S2140AG, C250S208100, C348S301000, C348S308000
Reexamination Certificate
active
07459667
ABSTRACT:
A method and apparatus to operate a pixel circuit within an active pixel image sensor in a common gate amplifier mode. A bias voltage is applied to a row select transistor in a pixel circuit, and the row select transistor is operated in a common gate amplifier mode. Moreover, the row select transistor can be operated in the common gate amplifier mode for a reset period. An integrated photo current is transferred from a sense capacitor to a capacitor coupled between a drain of the row select transistor and a sense node. Also, a row select voltage is applied to the row select transistor, and the pixel circuit is operated in a common source amplifier mode for a readout period.
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Fife Keith G.
Lee Hae-Seung
Baumann Russell E.
Sensata Technologies, Inc.
Yam Stephen
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