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Sallen-Key Band-Pass Filter

​
low-pass
R
1
10000
Ω
R
2
10000
Ω
C
1
10
μF
C
2
10
μF
R
4
R
3
0
0.5
1
10
100
stages
1
high-pass
R
1
10000
Ω
R
2
10000
Ω
C
1
10
μF
C
2
10
μF
R
4
R
3
0
0.5
1
10
100
Stages
1
plot settings
​
center freq
1
10
100
BW (decades)
2
4
6
​
autoscale
max
0
min
-50
Bode plots
​
​
single high-pass
single low-pass
overall
​
​
Sallen–Key topology filters are second-order active filters whose simplicity makes them a popular choice for general filtering applications. In this Demonstration, Bode plots are produced for single-stage low-pass and high-pass filters or a combination of these filters, up to 10 stages each.
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