Low‐Pass Filters
Low‐Pass Filters
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低通滤波器
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
C. Choi
中科院分区：
文献类型：
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作者：
C. Choi
低通滤波器抑制信号的高频分量，而不影响低频分量。
设计一个频率响应满足低通要求的电路（低通滤波器）的方法包括两个步骤：通过传递函数近似要求和综合传递函数。
有几种近似方法，例如，巴特沃思，切比雪夫，逆切比雪夫和考尔近似。由一种方法得到的传递函数不同于由其他方法得到的传递函数，并且具有不同的性质。然而，每个传递函数的频率响应满足低通要求。
保留字：
低通滤波器
Sallen-Key低通电路
巴特沃思近似;
切比雪夫近似
过渡带
A lowpass filter suppresses the high-frequency components of a signal, leaving intact the low-frequency ones.
An approach to design a circuit (a lowpass filter) whose frequency response satisfies the lowpass requirements consists of two steps: approximation of the requirements by a transfer function and synthesis of the transfer function.
There are several approximation methods, for instance, Butterworth, Chebyshev, inverse Chebyshev, and Cauer approximations. A transfer function obtained by one method is different from those obtained by the others, and has different properties. However, the frequency response of each of the transfer functions satisfies the lowpass requirements.
Keywords:
lowpass filter;
Sallen-Key lowpass circuit;
Butterworth approximation;
Chebyshev approximations;
transition band