1. By: Benjamin Grydehoej
Active Filter Design:
By: Benjamin Grydehoej
Napier University

2. Requirement for the Butterworth filter:
Active Filter Design:
Requirement for the Butterworth filter:
Data: • -3 dB Pass band Attenuator
• 3.4 KHz Pass band frequency
• 6.0 KHz Stop band frequency
• 10 dB Stop band Attenuator
• 6 dB Pass band Gain

3. Active Filter Design:
Types of filters:

4. Active Filter Design: Sallen-key:
This circuit has a phase orientation of 0 degree
The Gain is chosen by R3 & R4

5. Multiple Feedback: (MFB)
Active Filter Design:
Multiple Feedback: (MFB)
This circuit has a phase orientation of 180 degree
The Gain is chosen by R1 & R2

6. Active Filter Design:
Measurement:

7. Gain frequency Resopnse graph for Sallen-key:
Active Filter Design:
Gain frequency Resopnse graph for Sallen-key:

8. Gain frequency Resopnse graph for MFB:
Active Filter Design:
Gain frequency Resopnse graph for MFB: