Invention Publication
- Patent Title: PIXEL DESIGNS WITH REDUCED LOFIC RESET AND SETTLING TIMES
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Application No.: US17849403Application Date: 2022-06-24
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Publication No.: US20230421922A1Publication Date: 2023-12-28
- Inventor: Zhe Gao , Chengcheng Xu , Dennis Tunglin Lee , Tiejun Dai
- Applicant: OMNIVISION TECHNOLOGIES, INC.
- Applicant Address: US CA Santa Clara
- Assignee: OMNIVISION TECHNOLOGIES, INC.
- Current Assignee: OMNIVISION TECHNOLOGIES, INC.
- Current Assignee Address: US CA Santa Clara
- Main IPC: H04N5/378
- IPC: H04N5/378 ; H04N5/355 ; H01L27/146

Abstract:
Pixel designs with reduced LOFIC reset and settling times are disclosed herein. In one embodiment, a pixel cell includes a photosensor configured to photogenerate image charge in response to incident light, a floating diffusion to receive the image charge from the photosensor, a transfer transistor coupled between the floating diffusion and the photosensor to transfer the image charge to the floating diffusion, and a first reset transistor coupled between the floating diffusion and the voltage supply. The pixel cell further includes a capacitor having two ends, and a second reset transistor. A first end of the capacitor is coupled to the floating diffusion. The second reset transistor is coupled between a second end of the capacitor and the voltage supply.
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