Consider the FET amplifier of Fig. 4 for the case V-0.4V and k=5mA/V² VGS=0.6V, VDD=1.8V, and RD=10k a) Find the de quantities ID and VDs. b) Calculate the voltage gain Vas Fig. 4 VDD Rp obs

7) Consider the multi-stage amplifier shown below with its corresponding small signal model. Using the provided small Vo Vin signal model, perform small signal analysis to determine expressions the you would need to determine Av Do NOT solve for Av, just provide the expressions that you would need to determine Av. Show your work! Do NOT make any approximations. Vin + Vgs Vin Vcc Rd1 M1 gm 1 Vgs ro1 Vo1 Vo1 Vcc ww ww1. Rd1 Rc2 Q2 Re2 + Vbe rπ2 Vo www. gm2 Vbe Re2 WWW ro2 ww - Vo Rc2

Vin VGG VDD RD Ovout Rs The amplifier above has Rs = 1 ks, Rp = 5 k and is biased by VGG and VDD to have 8m = 9 mA/V. If Vin 1 V Vpp, what is the = peak-to-peak value of Vout?

b)The transistor consists of three terminals. The main reason for designing configurations is that it requires four terminals in order to provide the input and the output connections of the circuit for effective amplification. Now in your own words describe how Bipolar Transistors Transistor ( BJT ) various configurations are designed with relating diagrams. In your own estimation evalute which one is most widely used when looking at appreciable output for an amplifier?

For the BJT amplifier given in Figure, Find the small-signal input resistance Ri. Given: B=100, l=1mA Vcc vi A. infinite B. 25 Ohm C. VT/I Ri D. 2500 Ohm +V I -VEE E. Additional info is required to find. +vo

Vo 7) Consider the multi-stage amplifier shown below with its corresponding small signal model. Using the provided small signal model, perform small signal analysis to determine expressions the you would need to determine Av Vin Do NOT solve for Av, just provide the expressions that you would need to determine Av. Write your answer's and show your work! Do NOT make any approximations. Vin Vcc Rd1 M1 Vo1 Vin 2 quot + Vgs gm1 Vgs ro1 Vo1 Vcc WWW www. Rd1 Rc2 Q2 Re2 Vo + 4 Vbe rл2 gm2 Vbe Re2 ro2 Vo Rc2

Q2: For the circuit shown in figure (2), he=100 for all transistors and 1/hobs = 200k2. Find: a. DC values for Ics, Ici. Vez, Ic7 and Vco. b. Ad, A, and CMRR of the difference amplifier. +15v 10KE 100k 1k 10k Q8 Q3 v1 Q7 25k Q1 Q2 14.3k Q5 Q6 Q9 -15v Figure (2)

Consider the circuit shown below of a common source amplifier with a current mirror bias. Find the following: a. Find kp and kn. b. Find the drain current of M2 given that IBIAS = 2mA and VouT = 2.5V. c. Find the gm and r. of transistor M1. d. Sketch the small signal model of transistor M3 (Hint: Is there any small signal in any terminal of M3? If yes, then where is it? If no, then what happens to the small signal model?). It is given that the NMOS (M1) parameters are H,Con = 3mA/V? , VTH,n = 0.5V and A = 0.02 and the PMOS (M2 and M3) parameters are µ.Cox = 1mA/V? and VTH,p = -0.6V. The PMOS transistor M3 does not have channel length modulation while PMOS transistor M2 has A = 0.02. It is also given that the dimensions of M2 and M3 have equal widths of 5µm and lengths of L2 = 3µm and L3 = 1.5µm, respectively. M1 has length of L1 = 1µm and width of W1 = 2µm. 5V 5V M3 M2 VOUT VIN M1 IBIAS

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