High-pass and low-pass filters

Subsonic and ultrasonic filters can be combined into a single circuit for more stable and orderly bandwith. This good and qualified for only two frequencies with the rotation of widely separate. Circuit schematic above shows the rotation of the scond-order or high-pass Butterworth filter in combination with secon-order low-pass filter.
op amp bass
Part List :
R1___1K
R2___1K
R3___12K
R4___24K
C1___4n4
C2___2n2
C3___470nF
C4___470nF
IC___IC op-amp

For the capacitor , use the ceramic capacitors .

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