A Clockless Method of Flicker Noise Suppression in Continuous-Time Acquisition of Biosignals
A Clockless Method of Flicker Noise Suppression in Continuous-Time Acquisition of Biosignals
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DOI：
10.1109/biocas.2018.8584788
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
M. Maslik;T. Lande;T. Constandinou
中科院分区：
文献类型：
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作者：
M. Maslik;T. Lande;T. Constandinou
本文提出了一种新的斩波方法，可以在不需要固定频率时钟的情况下，抑制连续时间采集系统中的1/f闪烁噪声，随机地从输入端获得斩波信号，从而实现完全依赖于信号的功耗。对该方法进行了分析，解释了其操作基础，并给出了一个概念验证实现，并给出了仿真结果，表明在采集心电、脑电和脑电信号时，所获得的信噪比提高了8d B以上。
This paper presents a novel chopping method allowing suppression of 1/f flicker noise in continuous-time acquisition systems without the need for a fixed-frequency clock, stochastically deriving the chopping signal from the input and hence achieving completely signal-dependent power consumption. The method is analysed, its basis of operation explained and a proof-of-concept implementation presented alongside simulated results demonstrating an increase in achieved SNR of more than 8 dB during acquisition of ECG, EAP and EEG signals.