a) explain the function of the Q3-Q4 transistor pair, the Q5-Q6 transistor pair, Q1 and Q2

b) calculate the required gate source voltage for Q3 (VGS3) and Q5 (VGS5)

c) calculate the value of resistor R1 (in kΩ) to achieve the required reference current IREF

d) calculate the output resistance of the Q3-Q4 pair (ro4) in kΩ and the output resistance of the Q5-Q6 pair (ro6) in kΩ

e) calculate the minimum drain-source voltage for Q4 (VDS4min) and Q6 (VDS6min) to ensure that Q4 and Q6 remain in the saturation region

f) calculate the small signal parameters (including the output resistance) of Q1

g) calculate the small signal parameters (including the output resistance) of Q2

h) calculate the small signal gain Av = vout/vin

i) calculate the input and output resistance of the amplifier

An amplifier circuit from an analogue integrated circuit is shown in Figure 1 below. Q5 R1 IREF www PMOS NMOS vin NMOS NMOS Q1 Q4 PMOS Q6 12 Q2 NPN Figure 1 Analogue integrated circuit amplifier. vout O 12V VDD