Solved: (1) Consider the OpAmp circuit. Assume operation in the linear range.

Question

(1) Consider the OpAmp circuit. Assume operation in the linear range. Let Rout = 0 Ω and Rin = 00 Ω. a) Determine the Thevenin equivalent for the input circuit with Vsa and Vsb, i.e. values for VTH and RTH. (4 pts.) + Vsa Re Re Av Vo Rb Ra b) Determine the relationship vo in terms of vsa and Vsb. Solve with a finite A and then let A go to infinity. (Hint: Note that V₁ = VTH. Solve for the input and output in terms of vi and then eliminate Vi.) (4 pts.) c) Calculate values of Ra and Rb for which vo = 4(Vsa+Vsb). (4 pts.) (2) Consider the OpAmp circuit shown. Each OpAmp has Rout = 0 and Rino 2. Assume operation in the linear range. a) Determine the relationship Vo/vs. for the ideal case. Ra + Vs b) If Ra = Rb = Rc = Rd 3000 Q2 and vs = = Hint: consider two stages. (8 pts.) (3) Consider the OpAmp circuit shown. Assume operation in the linear range. Let R = 2000 2, Rout = 0, and Rin = 00 Q. a) b) Draw the equivalent circuit with a finite A. (2 pts) If is = 3.0 mA and A is infinite (ideal case), calculate the output voltage vo. (3 pts.) Avi Rb Av2 Vo Rd Re 5.00 V, calculate v₁ and Vo. is Av R Vo SHOW YOUR WORK