Low noise multirate SC read-out circuitry for thermoelectric integrated infrared sensors
- 17 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 664-667
- https://doi.org/10.1109/imtc.1994.352011
Abstract
In this paper we present a switched capacitor multirate read-out circuit for thermoelectric infrared sensors integrated on chip. The target application is a passive intrusion detector. The signal generated by the sensor in this particular application is quite small (few tens of μV) and has a narrow bandwidth (0.1+10 Hz). It must be amplified (keeping the noise level as low as possible) and band pass filtered. An auto-zeroed low-noise transconductance stage transforms the sensor output voltage in a current, which is applied to a multirate switched capacitor integrator, performing the signal processing. A prototype was integrated in a 1.2 μm CMOS technology. Simulation and experimental results are reported Author(s) Malcovati, P. Phys. Electron. Lab., Eidgenossische Tech. Hochschule, Zurich, Switzerland Leme, C.A. ; Lenggenhager, R. ; Maloberti, F. ; Baltes, H.Keywords
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