Gilbert B K, Sutterer W F, Johnson S A, Sturm R E, Wood E H, Tiemann J J, Baertsch R D
ISA Trans. 1976;15(2):169-74.
The analysis and processing of biological signals is often hampered by the contamination of these low frequency, often low amplitude waveforms by motion artifact in fluid-filled catheter systems and skin electrodes, power line hum, and so on. Although noise suppression techniques have relied upon low pass filtration of the analog signals with active or passive RLC filters, even the most recent active RLC filter implementations display operational characteristics not entirely satisfactory for low frequency applications.
生物信号的分析与处理常常受到干扰，这些低频且通常低幅度的波形会被充满液体的导管系统和皮肤电极中的运动伪影、电源哼声等所污染。尽管噪声抑制技术依赖于使用有源或无源RLC滤波器对模拟信号进行低通滤波，但即使是最新的有源RLC滤波器实现方案，在低频应用中的运行特性也并非完全令人满意。
