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

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 abou...

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Bibliographic Details
Main Authors: Posch, C., Matolin, D., Wohlgenannt, R.
Format: Conference Proceeding
Language:English
Subjects:
Bolometers
Capacitive sensors
Circuits
Infrared sensors
Optical amplifiers
Surveillance
Temperature dependence
Temperature sensors
Thermistors
Voltage
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Summary: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 10 kHz and consumes 85nW of static power. The amplifier circuit has been fabricated in a 0.35μm standard CMOS process and consumes less than 2000μm 2 of silicon area, enabling a square pixel size of 50μm x 50μm.
DOI:10.1109/ICECS.2007.4511179