LM348N 参数 Datasheet PDF下载

LM148/LM248/LM348

Typical Applications—LM148

(Continued)

A 1 kHz 4 Pole Butterworth

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Use general equations, and tune each section separately

Q

1stSECTION

= 0.541, Q

2ndSECTION

= 1.306

The response should have 0 dB peaking

A 3 Amplifier Bi-Quad Notch Filter

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Ex: f

NOTCH

= 3 kHz, Q = 5, R1 = 270k, R2 = R3 = 20k, R4 = 27k, R5 = 20k, R6 = R8 = 10k, R7 = 100k, C1 = C2 = 0.001 µF

Better noise performance than the state-space approach.

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