Also for the detector readout, we present a multi-channel charge-amplifier architecture with noise analysis. Effects of noise coming from amplifiers and related to the coupled detector’s dynamic conductances are illuminated. To pick up weak signals, synchronous detection can be implemented. A BDJ (Buried Double Junction) detector chip designed with a switched-phase architectural approach gives a minimum detectable signal of 15μlx@555nm or 1μlx@555nm at 27°C or – 10°C, for an integration time of 3s or 45s respectively.
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Guo-Neng Lu, Thierry Courcier, Bastien Mamdy, Sylvain Feruglio, Paul G. Charette, Vincent Aimez, Olivier Romain, Patrick Pittet, "CMOS buried multi-junction (BMJ) detector for bio-chemical analysis," Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 967412 (15 October 2015);