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《Application of Electronic Technique》 2011-07
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Amplitude and phase measurement circuit design used on neuromuscular disease assessment system

Li LiLi,Tian Xuelong,Li Yiyan(College of Bioengineering,Chongqing University,Chongqing 400030,China)  
Accurately picking up amplitude and phase at the same time is essential for neuromuscular disease assessment system.Based on the feature of highly integration of AD8302,a circuit to measure amplitude and phase was designed in this research,and the schematic diagram was provided.The method of circuit design was provied in detail with the frequency of 50 kHz.As a result of performance analysis of this system,the measured value of amplitude and phase is approach to rated value: 0.5 dB accuracy was achieved over a 20 dB range when measuring gain.Phase accuracy was 0.9° for a 90° range.
【CateGory Index】: R746
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