Title :
A linear resistance-to-frequency converter
Author :
Mochizuki, Kouii ; Watanabe, Kenzo
Abstract :
A resistance-to-frequency converter consisting of a Wheatstone bridge followed by an integrator and a comparator is described. It is basically a relaxation oscillator whose frequency changes linearly with a resistance change detected by the bridge. Analyses show that a resolution higher than 0.05% is possible with the simple configuration and an excellent linearity is kept over the wide resistance change by a simple compensation method. The converter is therefore best suited for an interface of a resistive sensor. Experimental results are also given to demonstrate its performance
Keywords :
Bridge circuits; Detectors; Educational institutions; Feedback circuits; Frequency conversion; Immune system; Linearity; Oscillators; Performance analysis; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1995. IMTC/95. Proceedings. Integrating Intelligent Instrumentation and Control., IEEE
Conference_Location :
Waltham, MA, USA
Print_ISBN :
0-7803-2615-6
DOI :
10.1109/IMTC.1995.515153