基于EFM32的高精度动态心电记录仪的低功耗设计

Low-power Design of EFM32-based High Precision Dynamic ECG Recorder

电池供电的动态心电记录仪是临床诊断和分析突发性与慢性心血管疾病的重要仪器,随着记录时间、体积重量与测量精度要求不断提高,然而系统必须兼具低功耗和高运算性能的特点。针对该矛盾,采用单片24位集成模拟前端ADS1298作为高精度信号采集电路,以32位Cortex-M3内核的新型低功耗微控制器EFM32G880F128为主控芯片,着重研究主频与功耗的关系,并提出软硬件优化措施。实验结果表明:该解决方案能很好地满足记录仪低功耗、微型化和高精度的设计要求。

Battery operated ECG Holter recorder is of great importance in clinical diagnosis and analysis of paroxysmal and chronic cardiovascular disease. With the increase of the record time and measurement accuracy, and the smaller volume, it puts forward higher request for the system＇s power consumption and operational performance. For this contradiction, the ADS 1298 integrated circuit serves as the analog signal measurement front-end, and the new type microcontroller of low power using 32-bit Cortex-M3 as the kernel, EFM32G880F128, is taken as the main control chip. By studying the relationship between main frequency and current consumption, we put forward the hardware and software optimization measures. The experiment results show that, this solution can better meet the design requirements of the recorder with low power consumption, miniaturization and high accuracy.