An Optimization Approach to Eliminate Crosstalk in Zero-Potential Circuits for Reading Resistive Sensor Arrays

Crosstalk is a well-known problem in resistive sensor arrays (RSA). The zero potential method (ZPM) commonly used readout circuit that uses multiplexers and demultiplexers to reduce the main sources of crosstalk. However, internal resistors these switches cause secondary crosstalk RSA alters values read. solution effects this still case study. In previous literature, resistances have been considered as known and, most cases, equal for all switch channels. real situation, they are unknown may vary between work, Least-Squares (LSQR) presented obtain true from read voltage signals. Calibration columns added purpose. To prove performance proposed, several simulations carried out with different sensors, resistances, size noise level. Results show proposed LSQR allows obtaining simultaneously accurate both sensors resistors. way, neutralized. It also shows better when compared existing approaches.