Invention Grant
- Patent Title: Image sensor with shared gray code generator and parallel column arithmetic logic units
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Application No.: US16854765Application Date: 2020-04-21
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Publication No.: US11431936B2Publication Date: 2022-08-30
- Inventor: Lihang Fan , Min Qu , Yu-Shen Yang , Charles Qingle Wu
- 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
- Agency: Perkins Coie LLP
- Main IPC: H03M1/12
- IPC: H03M1/12 ; H04N5/378 ; H03M7/16 ; H03M1/56 ; H03K19/21 ; H03K19/20

Abstract:
A readout circuit for use in an image sensor includes a plurality of comparators. Each one of the plurality of comparators is coupled to receive a ramp signal and a respective analog image data signal from a respective one of a plurality of column bit lines to generate a respective comparator output. Each one of a plurality of arithmetic logic units (ALUs) is coupled to receive phase-aligned Gray code (GC) outputs generated by a GC generator. Each one of the plurality of ALUs is further coupled to a respective one of the plurality of comparators to receive the respective comparator output. Each one of the plurality of ALUs is coupled to latch the phase-aligned GC outputs in response to the respective comparator output to generate a respective digital image data signal.
Public/Granted literature
- US20210329185A1 IMAGE SENSOR WITH SHARED GRAY CODE GENERATOR AND PARALLEL COLUMN ARITHMETIC LOGIC UNITS Public/Granted day:2021-10-21
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