Hi I'm a beginner trying to learn CMOS cuicuit.
Let's say we have two NMOS connected as shown. Given: A, B, C are connected to Vdd = 5V; VtM1 = 0.6V is the threshold voltage of M1; VtM2 = 0.5V is the threshold voltage of M2.
Could someone please explain why the voltage of node "y" is Vy = Vdd - VtM1 - VtM2 ? (which means if the input of M2, Vx = 5V - 0.6V = 4.4V, the output of M2 is Vy = 4.4V - 0.5V = 3.9V ?)