A low power level-crossing ADC for wearable wireless ECG sensors
A low power level-crossing ADC for wearable wireless ECG sensors
复制标题
用于可穿戴无线 ECG 传感器的低功耗跨电平 ADC
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Y. Lian
中科院分区：
文献类型：
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作者：
Zhenzhen Tian;R. Ying;Peilin Liu;Guoxing Wang;Y. Lian
大多数可穿戴生物医学设备都需要超低功耗。由于生物信号采样点的减少，基于事件驱动的模数转换器 (ADC) 可能是低功耗系统的绝佳候选者。在现有的基于事件驱动的ADC架构中，利用两个或多个高精度比较器来对输入信号进行采样。在本文中，我们提出了一种新方案，仅利用一个高精度比较器在低精度比较器的帮助下生成样本。对真实心电信号的Matlab仿真表明，与奈奎斯特采样方案相比，可以减少约25%的样本数量。
Ultra-low power consumption is desired in most wearable biomedical devices. The event-driven based Analog-to-Digital converter (ADC) could be an excellent candidate for low power system because of the reduction in sampling points for biosignals. In the existing event-driven based ADC architectures, two or more high precision comparators are utilized to sample the input signal. In this paper, we propose a new scheme utilizing only one high precision comparator to genertate samples with the assistance of a low precision one. From the Matlab simulations on real ECG signal, it is shown that around 25% reduction on the number of samples can be be achieved compared with the Nyquist sampling scheme.