RT Journal Article
T1 Method to reduce quantization error in direct interface circuits for resistive sensors
A1 Hidalgo-López, José Antonio
A1 Sánchez-Durán, José Antonio
A1 Oballe-Peinado, Óscar
K1 Detectores
AB Reading resistive sensors and converting their information to digital values is a matter of great interest in practical applications. Direct Interface Circuits (DICs) perform this task efficiently through a resistance-to-time-to-digital conversion. The main benefit of this type of circuit is the simplicity of its design and the accuracy of the results. However, one of its drawbacks is that quantization errors in the measurements seriously compromise accuracy if the information is not converted using a high-frequency clock or with high capacitor values. To avoid this situation, this article presents a new type of DIC with the same passive elements as a classic DIC, but which uses a high value resistor in the final instant of the resistance-to-time conversion. The circuit has been implemented using a commercial FPGA with the capture module operating at different clock frequencies. The results show that relative errors in measuring resistors of up to 33 Ω decrease to 1.56% when operating with a 12.5 MHz timer.
PB Institute of Electrical and Electronics Engineers (IEEE)
YR 2020
FD 2020-02-03
LK https://hdl.handle.net/10630/36995
UL https://hdl.handle.net/10630/36995
LA eng
NO J. A. Hidalgo-López, J. A. Sánchez-Durán and Ó. Oballe-Peinado, "Method to Reduce Quantization Error in Direct Interface Circuits for Resistive Sensors," in IEEE Sensors Journal, vol. 20, no. 23, pp. 13910-13918, 1 Dec.1, 2020, doi: 10.1109/JSEN.2020.2971315.
NO This work was supported by the Spanish Government and by the European ERDF program funds under Contract TEC2015-67642-R and by the Universidad de Málaga under program “Plan Propio 2018”.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026