运算放大器电路集锦Op Amp Circuit Collection
Op Amp Circuit Collection
National Semiconductor Application Note 31 September 2002
Note: National Semiconductor recommends replacing 2N2920 and 2N3728 matched pairs with LM394 in all application circuits.
Section 1―Basic Circuits
Inverting Amplifier Non-Inverting Amplifier
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Difference Amplifier
Inverting Summing Amplifier
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R5 = R1//R2//R3//R4 For minimum offset error due to input bias current
For minimum offset error due to input bias current
AN-31
2002 National Semiconductor Corporation
AN007057
www.national.com
AN-31
Section 1―Basic Circuits
(Continued) Inverting Amplifier with High Input Impedance
Non-Inverting Summing Amplifier
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*RS = 1k for 1% accuracy
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*Source Impedance less than 100k……
