Op amp practice problems
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Read the op-amp class notes.

For the circuit shown,

• R₁ = 2.2 kΩ
• R₂ = 82 kΩ
• R₃ = 3.3 kΩ
• R_f = 27 kΩ
• v_i1 = -80 mV
• v_i2 = -9 V
• v_i3 = 0.4 V

What is the output voltage v_o?

Answer