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Heat Balanced Bolometer with Sigma-Delta Interface

Authors:
Matthieu Denoual
Mathieu Pouliquen
Gilles Allègre
Damien Brouard
Arthur Veith
Olivier de Sagazan
Patrick Attia

Keywords: bolometer; sigma-delta modulator; electrical substitution; frequency sensor

Abstract:
This paper presents a single-loop 2nd order sigmadelta interface circuit for a bolometer operating in closed-loop mode. Switched capacitor circuitry is developed to implement the sigma-delta structure. The sigma-delta modulator acts both as digital readout circuit and as a mean of heat feedback. The design approach of the sigma-delta structure and the feedback shaping is explained. The circuit is designed for a realization in AMS CMOS 0.35μm technology.

Pages: 56 to 60

Copyright: Copyright (c) IARIA, 2012

Publication date: August 19, 2012

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-61208-208-0

Location: Rome, Italy

Dates: from August 19, 2012 to August 24, 2012