The Study about the New Method of Interface Circuit Design for Variable Resistive Sensors

가변형 저항 센서를 위한 새로운 방식의 인터페이스 회로 설계에 관한 연구

A new interface circuit for variable resistive sensors is proposed. The interface circuit compose of only two strain gages, a voltage-to-current converter, and current mirror with two outputs. A new dual slope A/D converter based on linear operational transconductance amplifier for the testing of prototype interface circuit is also described. The theory of operation is presented and experimental results are used to verify the theoretical predictions. The results show close agreement between predicted behaviour and experimental performance.