A ZPM-based Resistive Sensor Array Readout System With a Novel Compensation Method

Abstract

In this work, we present a modular acquisition platform for biasing and reading 2D crossbar resistive sensor arrays in either DC or AC mode based on the Zero Potential Method (ZPM). We also validate its scalability for arbitrary array dimensions with a minimum number of connections and array bond pads. The platform uses a new technique that compensates for the non-informative sensor bias component and allows the readout of sensor arrays with a wide range of nominal resistances. The platform is able to read up to 256 sensors in different array configurations and up to 4 sensors simultaneously. The platform's functionality is demonstrated using a 4 × 4 resistive array both in DC and AC mode. Such capabilities can be employed in a range of applications like Micro Total Analysis Systems (µTAS) devices, memristive reading and writing for neuromorphic systems, robotics sensing, or any other application based on crossbar resistive sensor matrices.