You can’t readily increase a DC voltage unless you convert it into some sort of AC first. This was a particularly ... What they did have was a special kind of device. When you apply current ...

Then they’ll convert it back to DC. If you are talking AC voltages, you could just use ... a lot of mobile radios (and other devices) took this idea to its logical conclusion.

A power tip that discusses how to address highly integrated USB PD charger design constraints with a self-biasing circuit.

A power supply for electronic devices. Also called an "AC adapter" or "charger," power adapters plug into a wall outlet and convert AC to a single DC voltage. Computers use multiple DC voltages ...