ABSTRACT
Most of the ECG signal generators used in China are imported ones and hence expensive. In this paper, an ECG signal generator system is introduced to design five waveforms: 60 Hz waveform heart rate, 90 Hz waveform heart rate, ventricular tachycardia waveform, ventricular fibrillation, and 10 Hz sine wave. The STM32 chip produced by ATMEL company was used as the main control chip in the signal generator. The functions can be achieved by the PWM signal frequency variable and some filter circuits. The aforementioned five waveforms can be arbitrary-switched. The principle of generating waveform, the design hardware circuit, and the software programming are described in this paper. Compared with the ECG signal generator implemented by some other pure hardware, this signal generator requires low power and is inexpensive, small, portable, and easy to maintain.
