Draw the schematic of a cmos inverter indicating input

Question

Problem

1. Indicate on the drawing the Source, Drain and Gate, and draw an arrow showing where the inversion layer pinches off when Drain voltage is above threshold. Dimension b is called and why Is it made as small as practical?

2. Draw the schematic of a CMOS inverter, indicating input, output, V_dd, and ground.

3. Calculate the small signal gain of the amplifier with your value of V_gs. Show your work