Determine the differential voltage gain of the circuit and

Question

Question 1:

Determine the differential voltage gain (v_o/(v_i1-v_i2)) of the circuit shown in Figure 1.

Assume:

K'n (W/L)= K'p (W/L)= 4 mA/V², |V_t| = 1.5 V

V_DD = 10 V, V₁ = 7.8V, V₂ = 7.5 V, λ₁ = λ₂ = 0.01 V^-1, l₁=5 mA

Question 2:

The circuit shown in Figure 2 has the following parameters:

I_REF= 50 μA, -V_EE= -5 V, β =125 and V_A=40 V.

Determine:

a) The output current of the circuits based on n=1

b) Repeat part (a) for n=3.

c) What is the current source voltage (V_CS) for n=3?

d) What is the minimum value of V_EE?

Question 3:

Use the Open-circuit time-constant technique and derive an expression for the f_H of the circuit shown in Figure 3.