I'm in a digital logic class and I've got a solid grasp on Boolean algebra, SOP, POS, NAND, NOR gates, etc. Now I'm having trouble in understanding what NMOS, PMOS and CMOS transistors are and how they're used. I've read the textbook for my class and I'm just completely lost.
Could someone give me an explanation about them, how they're used and how to draw them (schematic symbol)? One example that was mentioned in class was something along the lines of having a CMOS circuit implemented with NMOS and PMOS transistors or something.