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Analysis of a sigma–delta resistance-to-digital converter for differential resistive sensors

Publication Type : Journal Article

Publisher : IEEE

Source : IEEE Transactions on Instrumentation and Measurement, vol. 58, no. 5, pp. 1617-1622, May 2009

Url : https://ieeexplore.ieee.org/abstract/document/4776437

Campus : Coimbatore

School : School of Engineering

Department : Electronics and Communication

Year : 2009

Abstract : A direct resistance-to-digital converter (RDC) that is suitable for differential resistive sensors is proposed and analyzed in this paper. The RDC presented here provides a digital output that is linearly proportional to the parameter being sensed by a differential resistive sensor possessing either linear or inverse characteristics. The RDC employs the sigma-delta analog-to-digital conversion (Sigma-Delta ADC) principle and, hence, possesses all the advantages and limitations of such an ADC. Analysis shows that the proposed RDC has negligible sensitivity to variations in circuit parameters. Experimental results on a prototype built and tested gave a worst-case error < 0.15%, establishing the efficacy of the proffered RDC.

Cite this Research Publication : N. M. Mohan, B. George and V. J. Kumar, "Analysis of a Sigma–Delta Resistance-to-Digital Converter for Differential Resistive Sensors," in IEEE Transactions on Instrumentation and Measurement, vol. 58, no. 5, pp. 1617-1622, May 2009, doi: 10.1109/TIM.2009.2012949.

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