Three amplifiers with the following charac­teristics are cascaded in the order 1, 2, 3. Amplifier 1: Avoc1=300, Ri1=6 kΩ,Ro1=3 kΩ Amplifier 2: Avoc2=200, Ri2=4 kΩ,Ro2=2 kΩ Amplifier 3: Avoc3=100, Ri3=2 kΩ,Ro3=1 kΩ Find the parameters for the simplified model of the cascaded amplifier.

Design an instrumentation amplifier like that pictured in Figure 1 by choosing appropriate resistor values Ra1, Ra2, RG, and R1, R2, R3, and R4, such that the overall differential gain is as close as possible to 25. Choose values in the 10s of k ohm range. Divide the gain between the stages as you wish, but justifyyour design choices. (Q1) Explain the chosen values and give a rationale.

Question 1 a. Compute Vo/Vs parametrically. Explain briefly the operation principle of the circuit. If R1 is replaced with a capacitor C1 what would have changed in the circuit, compare the operation principle of two circuits. b. Explain briefly the saturation region in operational amplifiers (2 sentences).c. Explain the importance of feedback in operational amplifier circuits (3 sentences).d. Propose a method to obtain exponential voltage output in operational amplifier circuits (3 sentences).

The figure below shows an inverting amplifier connected to a load RL. Determine the power gain of the amplifier. power gain for the amplifier, G, is defined as the power ratio that reaches the load RL versus the power supplied by the source VS.