A Circuit for Amplifying and Denoising ECG Signal

Human signal is one of the important ways for various organs and tissues of the human body to interact. Therefore, detecting human signals can help people understand the current condition of the human body. In hospitals, ECG examination is one of the most common detection methods, it can help doctors determine the condition of the patient's heart. However, because the ECG signal has the characteristics of small amplitude and large noise, it is difficult to read the information carried by the signal. Based on the above discussion, this paper designs a signal processing circuit, which can amplify the circuit signal and remove the power supply noise at the same time. More importantly, its structure is simple and the power consumption is low. The simulation results show that the differential mode gain of the circuit reaches 38dB, the common mode gain reaches minus 41dB, and the power consumption is 18uW. The signal is not significantly distorted after amplification by this circuit. The circuit designed in this paper has a certain reference significance for the treatment of small human signals such as ECG signals in medical detection.