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《Computer Knowledge and Technology》 2008-01
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New Design of Preamplifier Circuit for ECG Signal

ZHANG Lei,ZHANG Hui (Department of College Computer Teaching,Anhui University,Hefei 230039,China)  
Based on the structure of classical instrumental amplifier,a preamplifier for the measurement of EEG signals is improved and designed.According to the characteristics in the ECG signal collection,we add a radio filter,a right-leg -driven circuit、a high-pass filter with reverse feedback and so on,which makes the CMRR of the preamplifier higher and safer for the detected person. The results indicate that the frequency response and CMRR meet the standard,making it suitable for ECG monitor.
【CateGory Index】: TN722
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