LM148J/883 National Semiconductor, LM148J/883 Datasheet - Page 10

• Manufacturer Part Number: LM148J/883
• Description: IC,Operational Amplifier,QUAD,BIPOLAR,DIP,14PIN,CERAMIC
• Manufacturer: National Semiconductor

Typical Applications—LM148
(Continued)
A 1 kHz 4 Pole Butterworth
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Use general equations, and tune each section separately
Q
= 0.541, Q
= 1.306
1stSECTION
2ndSECTION
The response should have 0 dB peaking
A 3 Amplifier Bi-Quad Notch Filter
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Ex: f
= 3 kHz, Q = 5, R1 = 270k, R2 = R3 = 20k, R4 = 27k, R5 = 20k, R6 = R8 = 10k, R7 = 100k, C1 = C2 = 0.001 µF
NOTCH
Better noise performance than the state-space approach.
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