新型心电信号检测带通滤波器的设计

发布时间：2018-01-09 18:14

本文关键词：新型心电信号检测带通滤波器的设计　出处：《重庆邮电大学学报(自然科学版)》2015年02期 　论文类型：期刊论文

【摘要】：提出了一种新型的用于心电信号检测的带通滤波器。心电信号是常见的生物电信号,低频达到0.1 Hz,高频分量超过100 Hz,其检测电路中需要一个0.1—100 Hz的带通滤波器。由于0.1 Hz的低截止频率和片上电容、电阻值的限制,采用传统滤波器设计方法很难达到设计要求。为寻找结构简单而性能达标的滤波器结构,引入了电流舵技术,用低通滤波器和高通滤波器串联的方式,使用不超过10 kΩ的电阻和不超过6 p F的电容就可以实现低达0.026 7 Hz的截止频率。该滤波器在SMIC 0.18μm工艺下进行设计与仿真,经过仿真验证,该滤波器在1.8V工作电源的情况下获得了0.026 7 202 Hz的通频带,低于168μV的输入参考噪声;0.1—100 Hz频带内相移小于±30°,带内波动小于1 d B,滤波器整体功耗为311 n W。该滤波器结构简单,所需电阻电容值小,具有低噪声、低功耗的特点。
[Abstract]:A new band-pass filter for ECG detection is proposed, which is a common bioelectric signal with a low frequency of 0.1 Hz and a high frequency component of more than 100 Hz. A band-pass filter of 0.1-100 Hz is needed in the detection circuit. The resistance is limited by the low cut-off frequency of 0.1 Hz and the on-chip capacitance. The traditional filter design method is difficult to meet the design requirements. In order to find a simple structure and the performance of the filter structure, the current rudder technology is introduced, and the low pass filter and high pass filter are used in series. A low cut-off frequency of 0.026 7 Hz can be achieved by using resistors of not more than 10 k 惟 and capacitors of no more than 6 PF. The filter is used in SMIC. The design and simulation are carried out under 0.18 渭 m process. The simulation results show that the filter has a pass band of 0.026 7 202 Hz at 1.8 V power supply, which is lower than 168 渭 V input reference noise. The phase shift in the frequency band of 0.1-100 Hz is less than 卤30 掳, the in-band fluctuation is less than 1 dB, and the overall power consumption of the filter is 311nW. The structure of the filter is simple and the value of resistance and capacitance required is small. It has the characteristics of low noise and low power consumption.
【作者单位】：重庆邮电大学光电工程学院;重庆邮电大学通信与信息工程学院;
【基金】：国家自然科学基金(61471075)~~
【分类号】：R318.6;TN713.5;TN911.23
【正文快照】： 0引言随着生物医疗和生物电子行业的快速发展,医疗电子产品的需求日益增加[1]。人们开始使用各种电子仪器来检测与处理各种生物电信号。而CMOS集成电路技术的进步则使得电路的设计更为简化,越来越多的功能被集成到芯片内部,以降低功耗并降低系统复杂度。生物电信号有很多种,常

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