Consider the following RF power amplifier: where L1 is a large inductor and C1 a coupling capacitor. Vbias is set so that M1 operates in its saturation region. Plus, the circuit is configured DC C1 sinoot out so that VcVdd/2. DC Vin (+ 1) What is this PA class? 2) Derive M1 total drain current (DCtac) in function off t)-irf sin(wot)?. 3) Plot ID versus ?0t. What is the conduction angle ??' 4) Derive the maximum theoretical efficiency formula (show all intermediate steps and details). 5) What is the Power Added Efficiency (PAE) expression?. 6) Why is efficiency an important metric for RF PA design