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agaelema
modified 6 years ago

OpAmp - Differential Amplifier

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In this configuration the OpAmp works as a differential amplifier. Normally R1=R3 and R2=R4 to facilitate the design and minimize the influence of bias current. In this case: Vou = (V+ - V-)*(R4/R3) In this example R4 is the resistor of 20k and R3 the resistor of 10k. Ps .: This simulation use DC signals because it's easier to see the numerical results and check with the formula. You can change to sine or square wave if prefer.
published 6 years ago

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