Invention Grant
- Patent Title: Active pixel with precharging circuit
- Patent Title (中): 带有预充电电路的有源像素
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Application No.: US12284491Application Date: 2008-09-22
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Publication No.: US08476567B2Publication Date: 2013-07-02
- Inventor: Yannick De Wit , Tom Walschap
- Applicant: Yannick De Wit , Tom Walschap
- Applicant Address: US AZ Phoenix
- Assignee: Semiconductor Components Industries, LLC
- Current Assignee: Semiconductor Components Industries, LLC
- Current Assignee Address: US AZ Phoenix
- Main IPC: H01J40/14
- IPC: H01J40/14

Abstract:
An active pixel including a precharge circuit for a sample and hold (S/H) stage and methods of operating the same are provided. In addition to the precharge circuit and S/H stage, the pixel may include a sensor circuit to generate a signal in response to electromagnetic radiation received on a photodetector included therein, and a multiplexer circuit. The S/H stage may include a switching-element to couple the signal from the sensor circuit to a capacitor element in the S/H stage to read-out and store the signal. The multiplexer circuit may include a switching-element coupled to an output node of the capacitor element to couple the signal to a column. The precharge circuit may include a switching-element coupled between the output node of the capacitor element and the column to precharge the capacitor element to a fixed voltage applied to the column when the S/H stage is not reading-out the signal.
Public/Granted literature
- US20100072350A1 ACTIVE PIXEL WITH PRECHARGING CIRCUIT Public/Granted day:2010-03-25
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