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The aim of this article is to describe a feedback circuit with thermoresistive sensor based on thermal sigma-delta modulator. The circuit uses 1-bit first order sigma-delta modulator in which a considerable part of conversion functions is performed by the sensor. This transducer circuit is able to measure digital physical quantities that interact with the sensor: temperature, thermal radiation and fluid velocity. In this study, it is used to measure environment temperature, on which digitaldoi:10.1109/i2mtc.2014.6860715 dblp:conf/i2mtc/RosaO14 fatcat:pwpjanesa5bixbgd2zcwgcafvm