If a transistor is a solid state digital switch, how can it also function as an analog amplifier?

Question

If a transistor is a solid state digital switch, how can it also function as an analog amplifier?

In: 4

Answer 1

Transistors are analog amplifiers. However they can’t give more power than the power supply can provide.

If you give the transistor a strong input, its amplification gets maxed out and it acts like a wire connected directly to the power supply (which is exactly what a switch is).