info about transistors

- 2 types of silicon
- p-type silicon: positive free-carriers (holes)
- n-type silicon: negative free-carriers (electrons)
- 2 types of transistors
- p-transistor: Gate (- charged), generates electric field that creates a (+ charged) p-type channel connecting sources & drain
- n-transistor: Gate (+ charged), generates electric field that creates a (- charged) n-type channel connecting sources & drain
CMOS
- Complementary Metal-Oxide Semiconductor (CMOS)
- use both p- & n-type transistors