Answer Happy

You are now hired. Company Blue Tiger Analog designed an op-amp and your manager ask you to make an amplifier out of it. Unfortunately, The op-amp has a finite open-loop gain of A. On top of that, there seems to be a resistance between the two terminals. For simplicity, we assume that that resistance miraculous equals to R₁ as well. Vin Rc ww R₂ MM R₁ R₁ ww Figure 3: Non-Ideal Opamp. O Vout a Ignore Ro for part a. Derive the expression for the gain of this circuit (G= Vout/Vin) as a function of open loop gain A and any other relevant circuit parameters. What happens when A goes to infinite? b Without redesigning the amplifier which might take months, you decide to do an emer- gency fix by soldering a resistor Rc in parallel with R₂ to see if you can get the ideal gain back. Assume R₁ = 4 KN, R₂ = 2 KN, and A = 10, is that possible? If it is not, please state why. If it is, find the value of Rc.