Title :
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
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 0.35¿m standard CMOS process and consumes less than 2000¿m2 of silicon area, enabling a square pixel size of 50¿m×50¿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;
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
DOI :
10.1109/ICECS.2007.4511179
