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LM224WN Scheda tecnica(PDF) 10 Page - STMicroelectronics |
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LM224WN Scheda tecnica(HTML) 10 Page - STMicroelectronics |
10 / 16 page Typical Single - Supply Applications LM124W-LM224W-LM324W 10/16 Figure 20. Activer bandpass filter Figure 21. High input Z, DC differential amplifier Figure 22. Using symmetrical amplifiers to reduce input current (general concept) 1/4 LM124W 1/4 LM124W R3 10kW 1/4 LM124W e 1 e O R8 100k W R7 100k W C3 10mF VCC R5 470k W C2 330pF R4 10M W R6 470k W R1 100k W C1 330pF Fo = 1kHz Q = 50 Av = 100 (40dB) 1/4 LM124W R1 100k W R2 100k W R4 100k W R3 100k W +V2 +V1 Vo 1/4 LM124W For (CMRR depends on this resistor ratio match) R 1 R 2 ------- R 4 R 3 ------- = e0 (e2 - e1) As shown e0 = (e2 - e1) 1 R 4 R 3 ------- + ⎝⎠ ⎛⎞ 1/4 LM124W I B 2N 929 0.001mF I B 3M W I B eo I I e I I B I B Aux. amplifier for input current compensation 1.5M W 1/4 LM124W |
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