2026-04-29T04:09:49Zhttps://repisalud.isciii.es/rest/oai/requestoai:repisalud.isciii.es:20.500.12105/171242024-01-16T12:15:58Zcom_20.500.12105_15322com_20.500.12105_2051col_20.500.12105_16927
Repisalud
author
Oballe-Peinado, Óscar
author
Vidal-Verdú, Fernando
author
Sánchez-Durán, José A
author
Castellanos-Ramos, Julián
author
Hidalgo-López, José A
2024-01-16T12:15:58Z
2024-01-16T12:15:58Z
2016-01-25
http://hdl.handle.net/10668/9786
http://hdl.handle.net/20.500.12105/17124
26821024
10.3390/s16020149
1424-8220
Sensors (Basel, Switzerland)
One of the most suitable ways of distributing a resistive sensor array for reading is an array with M rows and N columns. This allows reduced wiring and a certain degree of parallelism in the implementation, although it also introduces crosstalk effects. Several types of circuits can carry out the analogue-digital conversion of this type of sensors. This article focuses on the use of operational amplifiers with capacitive feedback and FPGAs for this task. Specifically, modifications of a previously reported circuit are proposed to reduce the errors due to the non-idealities of the amplifiers and the I/O drivers of the FPGA. Moreover, calibration algorithms are derived from the analysis of the proposed circuitry to reduce the crosstalk error and improve the accuracy. Finally, the performances of the proposals is evaluated experimentally on an array of resistors and for different ranges.
eng
FPGAs
direct sensor-to-digital device interface
parallel analogue data acquisition
resistive sensor arrays
Improved Circuits with Capacitive Feedback for Readout Resistive Sensor Arrays.
research article