提高低通滤波器的阶跃响应-嵌入式系统-电子产品世界
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提高低通滤波器的阶跃响应

资料介绍
摘要:添加一个低通滤波器的优化电路,使过滤器动态地调整其截止频率,保持相对较低的截止频率阶跃响应时间。

Maxim/Dallas > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS FILTER CIRCUITS (ANALOG)

Keywords: lowpass filter, step response, time-domain response, signal conditioning, switched-capacitor filter, Apr 26, 2004
SC filter

APPLICATION NOTE 3203
Lowpass Filter Has Improved Step Response

Adding optimization circuitry to a lowpass filter allows the filter to adjust its cutoff frequency dynamically,
preserving the step-response time for relatively low cutoff frequencies.


A common problem when designing lowpass filters for signal conditioning is their effect on the system's time-
domain response. Because pushing the cutoff frequency lower slows the step response, the system may fail to
recognize significant changes in time.


The Figure 1 circuit allows lower cutoff frequencies ……
提高低通滤波器的阶跃响应
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