Why do you need a Transistor to amplify your signals? Why can’t you directly add an extra power source to your signal circuit to boost/amplify your signals in circuit?

Question

Maybe use a high volt battery as additional power source?

In: Engineering

Answer 1

if you look at a transistor radio, that should be obvious: because you would start to fry the environment if you were to send radio waves at a couple of gigawatts, just so your radio at distance x could pick up the signal and play it at an audible level without having to amplify it 🙂

Also, low power signals are much easier to handle. They don’t cause as much interference, you can use thinner conductors and put them closer together.