Design of ECG Signal Acquisition and Processing Circuit

Abstract

This paper designs an ECG signal acquisition and processing circuit. The circuit includes p reamplifier circuit, a high-pass filter circuit, a low-pass filter circuit, 50Hz frequency filter circuit, the main amplifier circuit. Experiments show that it can effectively filter all kinds of interference in the ECG signal. The circuit can realize the acquisition and processing of ECG signal, which has the characteristics of low cost and easy operation. In troduction ECG is a weak signal and it is easy to interference by external noise. Therefore, the key of getting a ccurate ECG signal is how to remove noise. Currently, Most of scholars study how to filter baseline drift, 50Hz frequency interference and high frequency noise of ECG.Research methods and focus are different. Among them, more research is software algorithm of the ECG signal acquisition and processing. However, many ECG signal processing algorithms mainly achieve the desired treatment effect through the simulation method. Timeliness and usefulness are weak and limited to hardware re source conditions. It is difficult to achieve in the specific circuit. The circuit of design ECG signal acquisition and processing combines the characteristics of ECG.It designs the preamplifier circuit, high-pass filter circuit, low-pass filter circuit, 50Hz frequency trap circuit, main amplifier circuit. It can solve ECG acquisition and interference problems a nd reduce the impact of external interference signals to the ECG signal acquisition. It can effectively filter out the interference signal and achieve more accurate ECG signal.