1) Consider the amplifier shown below. Assume that VoQ = 6V and that the transistor is modeled as follows: VA= 100V, p = 100, VT = .025V 12V Vin WW 2K HH C1 12V 202K Vin2 42222 12K 1.2K Vo a) Determine the small signal parameters for the transistor Vo b) Perform small signal analysis to determine Av2 Vin2 shorts. = C2 Assume that the capacitors can be modeled as Vo Assume that the capacitors can be modeled as shorts. c) Perform small signal analysis to determine Av = d) Perform small signal analysis to determine Ri (at Vin) Assume that the capacitors can be modeled as shorts. Vin

A. For the configuration shown below in 4(A), find the small signal voltage gain (Voutp-Voutm)/Vin B. For the configuration shown in 4(B), find the following parameters (a) DC value of output voltage, (b) input common mode range and (c) small signal voltage gain when all transistors are in saturation vou/Vin as indicated in the diagram; Assume no body bias on M1 ad M2 For this problem ONLY, assume the following device parameters V7, = \V| = 0.5V;K, = k ,' = 100 µA / V²,a, = a, = 0.01 VDD = 3V (10/1) M, M. (10/1) (10/1) M, |M, (10/1) Voutp 20kΩ м, (200/1) м, м, (10/1) м, Vin (1/1) м, M. (10/1) + Vin DC VAN M, 100HA (1/1) M, M, (10/1) (A) (B) V. =-1V

2. The parameters of the transistor as shown in the figure below are ß = 100 and VA = 100V. a. Find the dc voltages at the base and emitter terminals. b. Find Rc such that VCEQ = 3.5V. c. Assuming Cc and CE act as short circuits, determine the small-signal voltage gain Av = Vo/Vs. d. Repeat part (c) if a 5000 source resistor is in series with the vs signal source. V+ = +5 V Rs = 100 £2 www Us Cc RB = 10 ΚΩ I= Iausmi 0.35 mA www RC -000 V=-5 V CE

Design a voltage divider biased CE stage with emitter degeneration. That stage should support a voltage gain of 5 and an input impedance larger than 3 KOhms with a bias current of 0.5 mA. Assume Beta=100, Is = 5e-17. Neglect the early voltage effect. You also need to provide values for the operating point of this transistor. Find the output resistance of this stage if the early voltage = 20 V.