Invention Grant
- Patent Title: CMOS light sensing cell
- Patent Title (中): CMOS感光单元
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Application No.: US10916902Application Date: 2004-08-12
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Publication No.: US07145123B2Publication Date: 2006-12-05
- Inventor: Tarek Lule , Stephan Benthien
- Applicant: Tarek Lule , Stephan Benthien
- Applicant Address: FR Montrouge
- Assignee: STMicroelectronics S.A.
- Current Assignee: STMicroelectronics S.A.
- Current Assignee Address: FR Montrouge
- Agency: Wolf, Greenfield & Sacks, P.C.
- Agent Lisa K. Jorgenson; James H. Morris
- Priority: EP03354072 20030821
- Main IPC: H04N5/217
- IPC: H04N5/217 ; H01L27/00

Abstract:
A light sensing cell comprising output circuitry for generating an output voltage depending on the voltage of a sensing node, the voltage of the sensing node varying as a function of a received light; a reset transistor operable to force the voltage of the sensing node to a reset voltage; a feedback loop including an operational amplifier operable to add through a capacitive voltage divider a correction voltage to the voltage of the sensing node, said correction voltage depending on the output voltage; and preset mean circuitry for, during the operation of the reset transistor and until the amplifier is operated, setting the input of the capacitive voltage divider to a predetermined voltage.
Public/Granted literature
- US20050040320A1 CMOS light sensing cell Public/Granted day:2005-02-24
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