A Continuous-Time Auto-Ranging Interface for Wide-Dynamic-Range Resistive Sensing

Le résumé fourni par la source

In this paper a low-cost, portable resistance measurement instrument capable of continuous, high-accuracy operation over a wide resistance range from 50Ω to$40 \mathrm{M} \Omega$is detailed and presented. The proposed architecture employs a voltage divider based measurement architecture with selectable reference resistors and a dynamic range-switching algorithm to enable auto range selection across multiple resistance decades. Experimental results demonstrate a relative measurement error below 2% throughout a wide dynamic measurement range, while the proposed switching strategy ensures stable range transitions with minimal transient disturbance and measurement discontinuities. The developed instrument is suitable for applications that require precise and continuous resistance monitoring under conditions of significant resistance variability.

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