Improvement of All Digital interferometer fiber optic gyroscope (IFOG) accuracy using True-Log amplifier

Abstract

because of its high performance fiber optic gyroscopes demand growing up very fast. Most of applications require high precision at ultra-low rotation rates which makes it complicated and costly. The use of high resolution analog to digital converters (ADC) can solve this problem but with high implementation complexity and cost. In this paper we introduce a new and a simple processing unit to improve All Digital IFOG accuracy by replacing ordinary transimpedance amplifier (TIA) with True-log amplifier (TLA). Our results show that ADC bits can reduced by 30% and have the same output accuracy.