How does transistor amplify?

Transistors, at least the typical bi-junction transistor, actually amplify current. We set them up in a voltage divider circuit that converts current gain into voltage gain. The simple explanation is...

vacuum tubes

The base is excited by a very low current. That turns the transistor on so that a higher amount of current flow comes out.

There are three pins on a transistor. One is hooked to the input signal. One to the power supply, and the third to ground. (These have different names depending on whether the particular device in...

Yes, but only if you already have the stronger current. A transistor is basically a switch which is activated by an electric current. AC (Alternating Current) can be amplified by using it to "switch"...