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Difference Amplifier (Subtractor) - 14180_125
Difference Amplifier (Subtractor) - 14180_127

Neets Module 08-Introduction to Amplifiers
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3-38 Eout = E2 - E1 Eout = (+12V) - (+3V) Eout = +9V To check this output, first compute the value of R2 plus R4: With this value, compute the current through R2 (IR2): (indicating current flow from left to right) Next, compute the voltage drop across R2 (ER2): Then compute the voltage at point B: Since point B and point A will be at the same potential in an operational amplifier: Now compute the voltage developed by R1 (ER1): Compute the current through R1 (IR1):






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