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Bainter_Notch_Filter.php   10067 Bytes    16-07-2014 00:19:23


Bainter Notch Filter Calculator




• The Q of the circuit depends only on the Gain of the OPAMP
• Notch-depth does not drift with temperature. Tuning with R6
• Easy shifting of Frequency by changing R1
• Lowpass (R4>R3), Notch (R4=R3) and Highpass (R4<R3) characteristic is possible.
• Maybe helpful : find parallel resistors

adubli   Active filter has stable notch and response can be regulated
adubli   Analog Devices Mini Tutorial No 203





Circuit Diagram :



Bainter Notch Filter



Calculations :




Center Frequency

[Hz]

Q

 

C1, C2

[nF]

R1, R2

[Ω]

R3, R4

[Ω]

R5, R6

[Ω]






Transfer Function :




Bainter Notch Filter Transfer Function



Simulations :



Simulations were done using TARGET 3001. Center Frequency : 1000 Hz

Parts used in Simulation :

OPAMP: LM358

Target 3001 FileBainter_Notch_Filter.T3001




 

 R1,R2 = 1 kΩ
 R3,R4 = 79.58 Ω
 R5,R6 = 31.8 kΩ
 C1,C2 = 100 nF
 Q = 10
 B = 100 Hz







 

 R1,R2 = 1 kΩ
 R3,R4 = 159 Ω
 R5,R6 = 15.9 kΩ
 C1,C2 = 100 nF
 Q = 5
 B = 200 Hz







 

 R1,R2 = 1 kΩ
 R3,R4 = 397.9 Ω
 R5,R6 = 6366 Ω
 C1,C2 = 100 nF
 Q = 2
 B = 500 Hz







 

 R1,R2 = 1 kΩ
 R3,R4 = 795.8 Ω
 R5,R6 = 3183 Ω
 C1,C2 = 100 nF
 Q = 1
 B = 1000 Hz











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t1 = 3913 d

t2 = 579 ms

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