Sensors & Transducers Journal
(ISSN: 2306-8515, e-ISSN 1726-5479)
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205.767 |
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(ISSN: 2306-8515, e-ISSN 1726-5479) |
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Vol. 18, Special Issue, January 2013, pp. 33-46
Selected papers from the 3rd International Conference on
Sensor Device Technologies and Applications (SENSORDEVICES' 2012)
and The 6th International Conference on Sensor Technologies
and Applications (SENSORCOMM' 2012),
19 - 24 August 2012, Rome, Italy
Design of a Sigma-Delta Interface for Heat Balanced
BolometerMatthieu DENOUAL, Damien BROUARD, Arthur VEITH, Mathieu POULIQUEN, Olivier de SAGAZAN, Patrick ATTIA, Gilles ALLEGREGREYC-ENSICAEN, 6 bd Maréchal Juin, 14050 Caen, France ENSICAEN, 6 bd Maréchal Juin, 14050 Caen, France IETR University of Rennes, Campus Beaulieu, 35000 Rennes, France NXP-Semiconductors, Campus Effiscience, 14460 Colombelles, France Tel.:+33 (0)2 31 45 26 92, +33 (0)2 31 45 26 98 E-mail: mdenoual@greyc.ensicaen.fr
Received: 19 November 2012 /Accepted: 14 December 2012 /Published: 22 January 2013 |
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Abstract: This paper presents the design of a sigma-delta interface for a heat balanced bolometer. The sigma-delta interface acts both as digital readout circuit and as a mean of heat feedback. The heat balancing is based on the Electrical Substitution principle and implementation through capacitive coupling. The design from the functional block down to the layout is presented. Expected performance of the realized chip is evaluated through transistor level circuit simulation and top-simulations. The circuit is designed for a realization in AMS CMOS 0.35 µm technology operating at 3.3 V.
Keywords: Bolometer, Heat balanced, Electrical substitution, Sigma-delta modulator
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