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A List of Active Filter Circuit Topologies

Shown below are the 78 circuit solutions available in
Filter Wiz PRO, organized into the following categories:

  • 1st order low pass
  • 1st order high pass
  • 2nd order low pass
  • 2nd order high pass
  • 2nd order band pass
  • 2nd order low pass notch
  • 2nd order high pass notch
  • 2nd order notch

1st Order Low Pass

Low Pass I Low Pass II Low Pass III

1st Order High Pass

High Pass I High Pass II High Pass III
High Pass IV

2nd Order Low Pass

Sallen-Key I Sallen-Key II
Multiple Feedback I Multiple Feedback II
Fliege Bach
Twin-T KHN
KHN Inverting Tow-Thomas
MB Berka-Herpy
Akerberg-Mossberg PMG
Natarajan

2nd Order High Pass

Sallen-Key I Sallen-Key II
Multiple Feedback I Fliege
Twin-T KHN
KHN Inverting MB
Berka-Herpy Akerberg-Mossberg

2nd Order Band Pass

Deliyannis I Deliyannis II
Sallen-Key Multiple Feedback I
Multiple Feedback II Fliege
Twin-T KHN
KHN Inverting Tow-Thomas
MB Berka-Herpy
Akerberg-Mossberg PMG
Natarajan

2nd Order Low Pass Notch

Friend's SAB Scultety
Boctor Fliege
Twin-T KHN
KHN Inverting MB
Berka-Herpy Akerberg-Mossberg
Natarajan

2nd Order High Pass Notch

Friend's SAB Scultety
Fliege Twin-T
KHN KHN Inverting
MB Berka-Herpy
Akerberg-Mossberg Natarajan

2nd Order Notch (Band Reject)

Sallen-Key Fliege
Twin-T I Twin-T II
KHN KHN Inverting
MB Berka-Herpy
Akerberg-Mossberg Natarajan