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เราจะทำแบบวิศวกรผู้ยิ่งใหญ่
7. July 2026
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Bainter_Notch_Filter.php 10841 Bytes 04-03-2025 19:11:10
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
Active filter has stable notch and response can be regulated
Analog Devices Mini Tutorial No 203
• 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
Active filter has stable notch and response can be regulated
Analog Devices Mini Tutorial No 203Circuit Diagram :
Calculations :
Transfer Function :
Simulations :
Simulations were done using TARGET 3001. Center Frequency : 1000 Hz
Parts used in Simulation :
OPAMP: LM358
Bainter_Notch_Filter.T3001
Parts used in Simulation :
OPAMP: LM358
Bainter_Notch_Filter.T3001
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R1,R2 = 1 kΩ
R3,R4 = 79.58 Ω R5,R6 = 31.8 kΩ C1,C2 = 100 nF Q = 10 B = 100 Hz |
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R1,R2 = 1 kΩ
R3,R4 = 159 Ω R5,R6 = 15.9 kΩ C1,C2 = 100 nF Q = 5 B = 200 Hz |
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R1,R2 = 1 kΩ
R3,R4 = 397.9 Ω R5,R6 = 6366 Ω C1,C2 = 100 nF Q = 2 B = 500 Hz |
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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 = 7299 d
t2 = 250 ms |
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