Optimization And Implementation Of The Modular ECG Amplifier

Cardiovascular morbidity is increased year by year, seriously affecting people’s health. ECG testing equipment provides protection for cardiovascular disease prevention and diagnosis. Modular ECG amplifier for ECG testing equipment has an important significance. On the basis of the previous, there is a design of an optimal ECG amplifier module. The INA128instrumentation amplifier is used on the front-end circuit primary amplification, and DC suppression feedback circuit to reduce the baseline drift. The right leg drive circuit has been optimized to better suppress common mode interference. Second voltage-controlled voltage source low-pass filter is used for anti-aliasing filtering. The double-T RC notch filter with adjustable Q value further suppresses frequency interference, in order to ensure the quality of the ECG signal.With the ECG amplifier module, we get a clear and stable ECG waveform, and with the help the USB6008OEM acquisition card, the host computer display and processing of the ECG signal can be enabled. The entire ECG amplifier module with small size, high precision, low power consumption, can be used for the design of the ECG equipment and speeds up product development.