发明授权
- 专利标题: Image sensor having supplemental capacitive coupling node
- 专利标题(中): 具有补充电容耦合节点的图像传感器
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申请号: US13619879申请日: 2012-09-14
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公开(公告)号: US08426796B2公开(公告)日: 2013-04-23
- 发明人: Duli Mao , Hsin-Chih Tai , Vincent Venezia , Howard E. Rhodes , Sohei Manabe
- 申请人: Duli Mao , Hsin-Chih Tai , Vincent Venezia , Howard E. Rhodes , Sohei Manabe
- 申请人地址: US CA Santa Clara
- 专利权人: OmniVision Technologies, Inc.
- 当前专利权人: OmniVision Technologies, Inc.
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Blakely Sokoloff Taylor & Zafman LLP
- 主分类号: H01L27/146
- IPC分类号: H01L27/146
摘要:
An image sensor includes a pixel array, a bit line, a supplemental capacitance node line, and a control circuit. The pixel array includes a plurality of pixel cells each including a floating diffusion (“FD”) node and a photosensitive element coupled to selectively transfer image charge to the FD node. The bit line is coupled to selectively conduct image data output from a first group of the pixel cells. The supplemental capacitance node line is coupled to the FD node of a second group of the pixel cells different from the first group. The control circuit is coupled to the supplemental capacitance node line to selectively increase the potential at the FD node of each of the pixel cells of the second group by selectively asserting a FD boost signal on the supplemental capacitance node line.