Two calibration methods to improve the linearity of a CMOS image sensor

Conference paper (2018)

Authors

F. Wang Electronic Instrumentation -

A.J.P.A.M. Theuwissen Electronic Instrumentation -

Research Group

Electronic Instrumentation () (TU Delft)

Calibration CMOS image sensor Linearity

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Published Date

2018

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

Abstract

This paper presents two on-chip calibration methods for improving the linearity of a CMOS image sensor (CIS). A prototype 128 × 128 pixel sensor with a size of 10 μm×12 μm is fabricated using a 0.18 μm 1P4M CIS process. Both calibration methods show obvious improvement on the linearity of the CIS. Compared with the voltage mode (VM) calibration, the pixel mode (PM) calibration method achieves better linearity results by improving the nonlinearity of the CIS 26×. This results in a minimum nonlinearity of 0.026%, which is a 2× better than the state-of-the-art.

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