Hey, this exercise is from my electronics exam (which i failed). My approach in finding a solution to these kinds of problems is to strategically pick out the KCL equations at the input nodes of each opamp. Since we can find the proper values of the voltages at the inputs, its all very straightforward. The thing is, i dont know how i should get the voltage at the inputs of opamp A2 (normally, i'd use superposition, but since we're working with controlled voltage sources...im at a dead end). My result is:
Va2+=[R2/(R2+R5)] * (K5Vx + K1Vy) (voltage divider)
V2 = [R11/(R11 + R14)] * (K4V4 + Va2+) (idem)
Another thing i found hard to determine was the voltage Vx. Since we dont have current flowing to the + input of the opamp, theres no voltage drop and Vx = K3V1...but what about the Vi source? should i use superposition to find Vx?
Sorry if these questions are stupid in some way...but i need to be sure of what im doing
Help would be very much appreciated...
Va2+=[R2/(R2+R5)] * (K5Vx + K1Vy) (voltage divider)
V2 = [R11/(R11 + R14)] * (K4V4 + Va2+) (idem)
Another thing i found hard to determine was the voltage Vx. Since we dont have current flowing to the + input of the opamp, theres no voltage drop and Vx = K3V1...but what about the Vi source? should i use superposition to find Vx?
Sorry if these questions are stupid in some way...but i need to be sure of what im doing
Help would be very much appreciated...
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