A Two-Stage Capacitive-Feedback Differencing Amplifier for Temporal Contrast IR Sensors

Author

Posch, Christoph ; Matolin, Daniel ; Wohlgenannt, Rainer

Author_Institution

Austrian Res. Centers GmbH - ARC, Vienna

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1071

Lastpage

1074

Abstract

This paper presents a small-area, ultra low-power, low-mismatch differencing amplifier for use in transient pixels of micro-bolometer based temporal contrast IR sensors. The two-stage capacitive-feedback amplifier works in the sub-threshold domain, has a voltage gain of 46dB, a 3dB bandwidth of about 10kHz and consumes 85nW of static power. The amplifier circuit has been fabricated in a 0.35Â¿m standard CMOS process and consumes less than 2000Â¿m² of silicon area, enabling a square pixel size of 50Â¿mÃ—50Â¿m.

Keywords

CMOS analogue integrated circuits; CMOS image sensors; bolometers; differential amplifiers; feedback amplifiers; infrared detectors; integrated circuit design; low-power electronics; CMOS process; low-mismatch low-power differencing amplifier; microbolometer; power 85 nW; power consumption; temporal contrast IR vision sensors; two-stage capacitive-feedback amplifier; Bolometers; Capacitive sensors; Circuits; Infrared sensors; Optical amplifiers; Surveillance; Temperature dependence; Temperature sensors; Thermistors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2007. ICECS 2007. 14th IEEE International Conference on

Conference_Location

Marrakech

Print_ISBN

978-1-4244-1377-5

Electronic_ISBN

978-1-4244-1378-2

Type

conf

DOI

10.1109/ICECS.2007.4511179

Filename

4511179