Abstract
The 2-D resistive sensor array in the row–column fashion suffered from the crosstalk problem for parasitic parallel paths. Firstly, we proposed an Improved Isolated Drive Feedback Circuit with Compensation (IIDFCC) based on the voltage feedback method to suppress the crosstalk. In this method, a compensated resistor was specially used to reduce the crosstalk caused by the column multiplexer resistors and the adjacent row elements. Then, a mathematical equivalent resistance expression of the element being tested (EBT) of this circuit was analytically derived and verified by the circuit simulations. The simulation results show that the measurement method can greatly reduce the influence on the EBT caused by parasitic parallel paths for the multiplexers' channel resistor and the adjacent elements.
Highlights
Miniaturized and integrated resistive sensor arrays were important for sensing applications, such as tactile sensing [1,2,3,4,5,6,7,8], temperature sensing [8,9], light sensing [10,11], photoconductive image sensing [12], olfactory sensing [13], etc
To have individual access of all resistors with a good measurement performance in the 2-D networked resistive sensor arrays, we propose using a novel crosstalk suppression method, which is based on the Improved Isolated Drive Feedback Circuit with Compensation (IIDFCC) of the column multiplexer resistor
As to the column number and the row number in IDFC and IIDFC, we found in Figure 4 that at least one parameter had a significant influence on their Rxy errors; with the increase of the column number or the row number in IIDFCC, we found that the absolute Rxy errors were reduced significantly compared with the other two circuits and the coefficient of its Rxy errors was negative
Summary
Miniaturized and integrated resistive sensor arrays were important for sensing applications, such as tactile sensing [1,2,3,4,5,6,7,8], temperature sensing [8,9], light sensing [10,11], photoconductive image sensing [12], olfactory sensing [13], etc. Suppressed the crosstalk caused by the adjacent row or column elements with large number of op-amps using part virtual ground (PVG) technique. D’Alessio et al [3,4,8,14] suppressed the crosstalk caused by the adjacent elements and the multiplexers with larger number of op-amps using full virtual ground (FVG) technique In these methods, the measurement accuracy of the EBT suffered from the interferences of some parasitic parameters, such as the different offset and bias of the op-amps, and the different on resistances of the mux [14]. Simulations will be implemented to evaluate this method with different parameters such as the measurement range of the EBT, the multiplexers’ resistor, and the array size of 2-D networked resistive sensor arrays. The results of experiments will be analyzed and conclusions for the method will be given
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