A low-noise oversampling signal detection technique for CMOS image sensors

Author

Kawai, N. ; Kawahito, S.

Author_Institution

Graduate Sch. of Electron. Sci. & Technol., Shizuoka Univ., Japan

Volume

1

fYear

2002

fDate

6/24/1905 12:00:00 AM

Firstpage

265

Abstract

In this paper, we propose a method of low-noise signal readout using frame oversampling and a CMOS image sensor with non-destructive high-speed readout mode. The technique enables the use of high-gain column amplifiers and the digital integration of signals without noise accumulation. The column amplifier is effective for reducing the noises due to the wideband amplifier and the quantization noises. Simulation results show that the noise can be reduced by a factor of 20 log₁₀ M [dB] where M is the oversampling ratio.

Keywords

CMOS image sensors; digital readout; nondestructive readout; quantisation (signal); signal detection; signal sampling; CMOS image sensors; active pixel circuit; differential pulse code modulation; digital integration; frame oversampling; high-gain column amplifiers; low-noise signal readout; nondestructive high-speed readout mode; oversampling signal detection technique; predictive encoder; quantization noises; wide dynamic range; wideband amplifier noises; CMOS image sensors; CMOS technology; Charge coupled devices; Circuit noise; Diodes; Noise level; Noise reduction; Pulse amplifiers; Signal detection; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2002. IMTC/2002. Proceedings of the 19th IEEE

ISSN

1091-5281

Print_ISBN

0-7803-7218-2

Type

conf

DOI

10.1109/IMTC.2002.1006851

Filename

1006851