Reference no: EM132542666
Question 1: Find the expression for the voltage gain, input and output impedances of the circuit below. Ignore the early effect for the voltage gain and input impedance derivation.
![1807_figure.jpg](https://secure.expertsmind.com/CMSImages/1807_figure.jpg)
Question 2: Given Vcc = 27V, β1 = 250 and β2 = 100 and VA = ∞
a. Calculate all the terminal currents (Ic, IB and IE) of each transistor.
b. Calculate the overall gain of this amplifier.
c. Calculate the Ri and Ro
![2142_figure1.jpg](https://secure.expertsmind.com/CMSImages/2142_figure1.jpg)
Question 3: For the circuit shown below, find the values for Vb, Ic1, Ic2 and Ic3. Assume β = 50 and VA = ∞.
![2476_figure2.jpg](https://secure.expertsmind.com/CMSImages/2476_figure2.jpg)
Question 4: Consider the following amplifier circuit. All capacitors are infinite valued.
![1636_figure3.jpg](https://secure.expertsmind.com/CMSImages/1636_figure3.jpg)
a. Specify the type of amplifier in each stage.
b. Draw the small signal model of this amplifier and include the early effect.
c. Derive an expression for RoutI and Rout2 including early effect.
d. Derive expressions for Rinl and Ring. Ignore the early effect.
e. Derive the expressions for the overall voltage gain Vout/Vsig
Question 5: Design the common emitter with degeneration amplifier of the Figure P1 below. The amplifier should have a gain of 10 and an output impedance of 500Ω. The voltage drop across RE must sustain 300 mV and the current IR1 is approximately 10 times the base current. For the circuit, assume v 150 and the early voltage is negligible.
![2300_figure4.jpg](https://secure.expertsmind.com/CMSImages/2300_figure4.jpg)