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An Improved Zero Potential Circuit for Readout of a Two-Dimensional Resistive Sensor Array.

Jian-Feng Wu¹, Feng Wang², Qi Wang³

¹School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China. wjf@seu.edu.cn.

Sensors (Basel, Switzerland)

|December 9, 2016

Summary

This study introduces an improved zero potential circuit to accurately measure resistance in 2-D sensor arrays. The novel design effectively suppresses crosstalk, enhancing measurement precision for the element being tested.

Keywords:

crosstalk improved zero potential circuit measurement the 2-D resistive sensor array zero potential circuit

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Area of Science:

Electrical Engineering
Sensor Technology
Circuit Design

Background:

Traditional zero potential circuits in 2-D resistive sensor arrays suffer from crosstalk due to bypass currents.
This crosstalk impacts the accuracy of measuring the element being tested (EBT).

Purpose of the Study:

To design and verify an improved zero potential circuit that suppresses crosstalk.
To enhance the measurement accuracy of individual elements in 2-D resistive sensor arrays.

Main Methods:

Developed a novel zero potential circuit utilizing an additional operational amplifier (op-amp) in negative feedback.
Simulated circuit performance using NI Multisim 12, analyzing parameter effects on EBT accuracy.
Verified key features of the improved circuit through experimental prototype testing.

Main Results:

The improved circuit successfully samples total bypass current for precise EBT resistance calculation.
Simulations and experiments confirmed enhanced accuracy in accessing the EBT compared to traditional methods.
The enhanced circuit requires additional components (op-amp, resistor, sampling channel).

Conclusions:

The novel zero potential circuit effectively mitigates crosstalk in 2-D resistive sensor arrays.
Despite increased component count, the improved circuit offers superior accuracy for EBT measurement.
This advancement is crucial for precise sensing applications utilizing 2-D resistive arrays.