Solid-state devices
All electronic devices such as computer chips and hi-fi’s are made up of n-type and p-type semiconductors
- diode: n-p junction, acts as a one-way for current
- transistor: n-p-n junction, acts as a “tap” for current
- a memory element of a computer chip is made of four transistors
Solid-state devices can be made very small, allowing computers to perform very complex operations