Question 1 Recall that Vcc = 22V, R1 = 39k2, R2 = 3.9k2, Rc = 10k2, RE = 1.5k2 and Cg is a bypass capacitor. At the above Q-point, the small signal h-parameters are as follows: hựe = 100, hie = 1.2kN, hoe and hre are assumed to be zero Rc HE i) Draw the small signal equivalent circuit (include C¡ and C2). E RE CE Fig 1 ii) Neglecting C1 and C2, find (showing your working steps): a) The input impedance, Zi; expression relating Vi and Ii should be included in your working. b) The output impedance, Zo; expression relating Vo and Io should be included in your working. c) The no load voltage gain, AvNL; iii) If an input AC source applied to V; has a source resistance of Rs = 700 Q and open circuit AC voltage of Vs = 20 mV (Vpp), find Vo (Vpp). Suggestion: apply the parameters obtained in the previous question. iv) With the above source applied to Vi, now a load resistance of RL = 1 k2 is connected between Vo and ground. Find the resulting loaded output voltage, VL (Vpp). in

2. The analog signal shown in the following figure is to be delta modulated. The sampling period and the step size are indicated by the grid on the figure. Draw the staircase function that follows the signal as closely as possible and write down the delta modulation output.

Q22...