Low-power programmable linear-phase filter designed for fully balanced bio-signal recording application
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概要
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A reconfigurable fully differential programmable linear-phase filter is presented in the paper which can be used in portable multichannel electroencephalogram, electrocardiogram, wireless brain-heart monitoring systems used in hospital or home care settings. To reduce the influence of coefficient sensitivity and maintain an undistorted bio-signal, a fifth-order ladder-type Bessel Transconductance-Capacitor (Gm-C) lowpass filter is employed. The filter is designed as part of on-chip self-adjusting noise suppression block and its programmability makes it suitable for different biomedical signals processing. Simulation results show that this low-voltage and low-power filter possesses the HD3 of 50.7dB, dynamic range of 62dB, dc gain of -2.899dB, and power consumption of 30µW. Meanwhile, the designed filter can effectively reduce self-adjusting noise on specific channels and anti-aliasing of the analog-to-digital converter (ADC).
著者
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LEI Shaochong
School of Electronic & Information Engineering, Xian Jiaotong University
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LIANG Feng
School of Electronic & Information Engineering, Xian Jiaotong University
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Zhang Guohe
School of Electronic and Information Engineering, Xi'an Jiaotong University, Shaanxi 710049, China
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Shao Jun
School of Electronic and Information Engineering, Xi'an Jiaotong University
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Tao Huibin
School of Electronic and Information Engineering, Xi'an Jiaotong University
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