The following LNA utilizes a folded cascode topology to operate under a smaller VDD. Assuming that L1 and L2 resonate with the total capacitances at the respective output node and at the intermediate node, and assuming a Q of 10 for the inductors, calculate the overall gain (15 points) and NF (15 points) of the LNA. Use the gm1=gm2=0.02 S (20 mS). What is the main noise contributor to the overall noise figure and what would be the total NF when considering only the noise from the main noise contributor and RS? (10 points) (The inductor's equivalent RP also contributes to noise as well)
Operation frequency = 5 GHz
L1 = 1 nH
L2 = 0.5 nH
Q = 10
gm1 = gm2 = 20 mS
Rs = 50 ohms
DC
M Vout
Rs Vino Wr