Design of the Intelligent Simple Electrocardiograph

摘要

This paper proposes a low-cost simple intelligent electrocardiograph (ECG) which is easy to popularize. With AT89S52 singlechip as its core controller, and based on software system developed by RTX51, the ECG is able to achieve real-time display of heart waveform and heart rateon its LCD. It adopts INA128- a low-power-consuming and highly-precise instrument amplifier- to be the pre-amplifier, and thus has a high CMRR. It has high-pass, low-pass and band-stop filter circuit to restrain various disturbances. The system is connected to the PC with serial communicate interface to display, analyze and process heart waveforms. The simple intelligent electrocardiograph is easy to use and easy to carry in practical application.