Implementation of a DSP Based Impedance Measurement Instrument Using Ellipse Fitting Algorithms

摘要

In this paper, the DSP implementation of an impedance measurement instrument based on ellipse fitting algorithms is described. The system prototype is based on a commercial DSP kit with few external electronics for baseline assessment and requirements definition. The implemented system is tested for impedance magnitudes from 100 OMEGA up to 15 k(OMEGA), phases in the +-90 deg range at 1 kHz measuring frequency with extremely good results.