A Simple Bridge Resistance Deviation-to-Frequency Converter for Resistive Sensor Bridges
Po Lee, Min-Young An, Chang-Soo Won, Jin-Woong Jung, Won-Sup Chung, Sang‐Hee Son · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2007
A bridge resistance deviation-to-frequency (BRDto-F) converter is presented for interfacing resistive sensor bridges. It consists of a linear operational transconductance amplifier (OTA), a current-controlled oscillator (CCO). A prototype circuit built using discrete components exhibits a conversion sensitivity amounting to 16.90 ㎑/ Ω and a linearity error less than ±0.03%. Its application to a load cell is also presented.