便携式心电图仪的设计

Design of Portable ECG

本设计采用新型低功耗的16位单片机MSP430F2274作为整个系统的控制核心,利用低噪声、低功耗,有良好的共模输入抑制能力的仪表放大器INA2331,对输入的心电信号进行放大,再进行低通、高通滤波,滤去干扰信号,最后在通用示波器上得到清晰的心电波形。带字库液晶12864提供欢迎界面和操作菜单,并通过键盘选择,用MSP430F2274单片机内置的A/D、FLASH闪存实现心电图波形数据的转换、存储与回放。

The design uses a new type of low - power 16 - bit single - chip MSP430F2274 the control of the entire system as the core, using low - noise, low power consumption, good input common - mode rejection of the instrumentation amplifier INA2331, the input signal to the heart to enlarge and then tow - pass, high pass filter, least squares signal interference, and finally in general have been given clear oscilloscope ECG waveform. 12864 with the prevision of welcome character LCD interface and operation of the menu, and select a keyboard with a built - in MSP430F2274 Single Chip A / D, FLASH memory ECG waveform data to achieve the conversion, storage and playhaek.