2026-05-30T04:49:56Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/271512026-02-03T11:09:19Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Hidalgo-López, José Antonio author 2023-08 This article proposes two novel circuits for the digital readout of resistive sensors with parasitic series resistances caused by the lead wire needed to connect remote sensors. Both circuits are based on so-called direct interface circuits (DICs). These circuits perform a resistance-to-time-to-digital conversion by adding some external components to a digital processors (DP). The new circuits are very simple since they only use a capacitor and two or three resistors, depending on the proposal. A single discharging of the capacitor provides two or three time measurements to estimate the resistance of the sensor, eliminating the influence of lead wire resistances. Using a single discharging process simultaneously reduces error sources, measurement time, and energy consumption. A circuit that uses an FPGA as DP to estimate resistances corresponding to several thermal sensors presents systematic errors below 0.15% or 0.12%, depending on the proposal, for a maximum measurement time of 1.09 ms. Hidalgo-López, J. A. (2023). Direct Interface Circuits for Resistive Sensors Affected by Lead Wire Resistances. Measurement, 113250. https://hdl.handle.net/10630/27151 10.1016/j.measurement.2023.113250 Electrónica Circuitos de interfaces Cables eléctricos Detectores Direct interface circuits for resistive sensors affected by lead wire resistances