Invention Grant
- Patent Title: Global shutter image sensor pixels having improved shutter efficiency
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Application No.: US15795718Application Date: 2017-10-27
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Publication No.: US10582140B2Publication Date: 2020-03-03
- Inventor: Jaroslav Hynecek
- Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Applicant Address: US AZ Phoenix
- Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee Address: US AZ Phoenix
- Agency: Treyz Law Group, P.C.
- Agent Michael H. Lyons; David K. Cole
- Main IPC: H04N5/363
- IPC: H04N5/363 ; H04N5/3745

Abstract:
An image sensor may be provided with an array of image sensor pixels formed on a substrate having front and back surfaces. Each pixel may have a photodiode that receives light through the back surface, a floating diffusion node, a charge transfer gate, and first and second reset transistor gates. A source follower transistor may have a gate coupled to the floating diffusion node and a source coupled to an addressing transistor. The pixel may be coupled to a column feedback amplifier through the addressing transistor and a column feedback reset path. The amplifier may provide a kTC-reset noise compensation voltage to the reset transistors for storage on a holding capacitor coupled between the floating diffusion and a drain terminal of the source follower. The floating diffusion may be bounded at the front surface by the transfer gate, the reset gate, and p-type doped regions.
Public/Granted literature
- US20180048841A1 GLOBAL SHUTTER IMAGE SENSOR PIXELS HAVING IMPROVED SHUTTER EFFICIENCY Public/Granted day:2018-02-15
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