首页|高纯度脉搏信号处理电路的设计与实现

高纯度脉搏信号处理电路的设计与实现

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针对脉搏信号幅值微弱易受干扰等问题,设计一款高纯度脉搏信号处理电路.首先,通过轨对轨满摆20 dB放大器,对信号进行前置放大和二次放大,使信号达到易处理幅值.其次,采用基于 UAF42 的工频陷波器去除电力系统中的工频干扰.最后,设计八阶巴特沃斯低通滤波器应用于脉搏信号处理中,滤波器采用 Sallen-Key 拓扑结构以减少电路元件使用.实验结果表明,处理电路能有效抑制工频干扰且中心频率±0.5 Hz 可调,巴特沃斯低通滤波器能在不丢失原始信号的前提下去除高频噪声,以硬件方式实现脉搏信号的放大与提纯.
Design and Implementation of High Purity Pulse Signal Processing Circuit
To address the challenges associated with inadequate pulse signal amplitude and susceptibility to interference,this paper presents the design of a high-purity pulse signal processing circuit.Firstly,employing a rail-to-rail,full-swing 20 dB amplifier,the signal is pre-amplified and subsequently re-amplified to facilitate optimal processing amplitude.Secondly,a notch filter,based on the UAF42,is utilized to eliminate power frequency interference within the power system.Finally,an eighth-order Butterworth low-pass filter is designed for pulse signal processing,utilizing a Sallen-Key topology to minimize the number of circuit components.The test results demonstrate that the processing circuit effectively suppresses power frequency interference,with an adjustable center frequency of±0.5 Hz.Furthermore,the Butterworth low-pass filter effectively removes high-frequency noise without compromising the integrity of the original signal,thereby enhancing both the hardware amplification and purification of pulse signals.

pulse signalUAF42power-line interferenceButterworth filterSallen-Key topology

刘智、童耀南、崔建山、宋伟、陈振光

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湖南理工学院 信息科学与工程学院,湖南 岳阳 414006

多模态健康传感与智能分析湖南省工程研究中心,湖南 岳阳 414006

东莞市振海电子科技有限公司,广东 东莞 523430

脉搏信号 UAF42 工频干扰 巴特沃斯滤波器 Sallen-Key拓扑

湖南省自然科学基金项目湖南理工学院研究生科研创新项目

2023JJ30283

2024

湖南理工学院学报(自然科学版)
湖南理工学院

湖南理工学院学报(自然科学版)

影响因子:0.259
ISSN:1672-5298
年,卷(期):2024.37(3)