A digital pixel image sensor for real-time readout

Author

Andoh, Fumihiko ; Shimamoto, Hiroshi ; Fujita, Yoshihiro

Author_Institution

NHK Sci. & Tech. Res. Labs., Tokyo, Japan

Volume

47

Issue

11

fYear

2000

fDate

11/1/2000 12:00:00 AM

Firstpage

2123

Lastpage

2127

Abstract

An experimental digital image sensor that converts analog video signals into 8-bit digital signals for each unit pixel, and reads out the signals at an operating clock of standard TV has been developed. Each pixel is equipped with a photodiode, a 1-bit analog-to-digital converter (1-bit ADC), an 8-bit pulse counter, and a signal processing circuit. The sensor system displays a two-dimensional (2-D) image in real time. The 1-bit ADC has a dynamic range of 110 dB at an operating voltage of 1.3 V. “Knee” characteristics and the results of an investigation into random noise sources in the circuit are also described

Keywords

analogue-digital conversion; counting circuits; image sensors; random noise; readout electronics; 1.3 V; 2D image; 8 bit; analog video signals; analog-to-digital converter; digital pixel image sensor; knee characteristics; operating clock; operating voltage; pulse counter; random noise sources; real-time readout; signal processing circuit; standard TV; Circuits; Clocks; Digital images; Image converters; Image sensors; Photodiodes; Pixel; Standards development; TV; Two dimensional displays;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.877174

Filename

877174