Linearity analysis of a CMOS image sensor

• DOI: 10.2352/issn.2470-1173.2017.11.imse-191
• Publication Date: 2017-06-23T03:04:40Z
• Authors: Fei Wang; Albert Theuwissen
• Keywords: Linearity; Dot pitch; CMOS Sensor

In this paper, we analyze the causes of nonlinearity a voltage-mode CMOS image sensor, including theoretical derivation and numerical simulation. A prototype chip designed in 0.18 μm 1-poly 4-metal process technology is implemented to verify analysis. The pixel array 160 × 80 with pitch 15 μm, it contains dozens groups pixels that have different design parameters. From measurement results, confirmed these factors affecting linearity can give guidance for future realize high sensor.