4) Consider the 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(s). Do NOT solve for Av(s), just provide the expressions that you would need to determine Av(s). Show your work! Do NOT make any approximations. Vin Cf Vcc www R 20 "|||||S CL Vin www R1 Cf + Vberπ Hli R gm Vbe ww ro Vo CL

You are tasked with designing a linear amplifier using an NPN BJT for the circuit shown below. This means the transistor iv curves apply here. The voltages given are Vcc = 14 V and Vs = 1.0 V. The datasheet for the transistor says VBE (ON) = 0.7 V,VCE (SAT) = 0.2 V, and ß = 400. The design should have ic = 12 mA and VCE = 8 V. Find the resistances Rb and Rc that give the required ic and VCE. Vs H Rb M d VBE Rc VCE Vcc

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

4) Consider the 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(s). Do NOT solve for Av(s), just provide the expressions that you would need to determine Av(s). Show your work! Do NOT make any approximations. Vin Cf Vcc WWW R Vo CL Vin W R1 Cf + Vberπ ww R gm Vbe W ro Vo CL