・In Japanese
Premise knowledge
・Scilab
・Transfer function
・How to draw a Bode diagram
■What is a bandpass filter?
A bandpass filter is a filter that allows only specific frequencies to pass, and is expressed by the transfer function below.
■Bode plot of bandpass filter
The parameters are as follows.
The results drawn with Scilab are as follows. (Reference: How to use Scilab)
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s=poly(0,'s');
p=syslin('c',0.628*s/(s^2+0.628*s+6.28^2);
bode(p);
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■Simulating the operation of a bandpass filter with Scilab
Create it in Scilab as follows.
<When f=1Hz (6.28rad/s)>
The black line is the input, and the green line is the output. Frequencies in this band pass through, so the input and filtered values are equal.
<When f=10Hz (62.8rad/s)>
You can see that frequencies in this band are not passed.
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