LM148-N, LM248-N, LM348-N
SNOSBT2E –MAY 1999–REVISED MARCH 2013
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Use the BP outputs to tune Q, Q′, tune the 2 sections separately
R1 = R2 = 92.6k, R3 = R4 = R5 = 100k, R6 = 10k, R0 = 107.8k, RL = 100k, RH = 155.1k,
R′1 = R′2 = 50.9k, R′4 = R′5 = 100k, R′6 = 10k, R′0 = 5.78k, R′L = 100k, R′H = 248.12k, R′f = 100k. All capacitors
are 0.001 μF.
Figure 26. Lowpass Response
Typical Simulation
Figure 27. LM148, LM741 Macromodel for Computer Simulation
For more details, see IEEE Journal of Solid-State Circuits, Vol. SC-9, No. 6, December 1974
o1 = 112IS = 8 × 10−16
o2 = 144*C2 = 6 pF for LM149
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