Patent ID: 8669811

Claim:
A radio-frequency power amplifier with envelope tracking, comprising: a power RF amplifying device (T A ) for amplifying a RF signal; and a switching DC/DC converter (DCC), comprising a switching (T S ) device and a rectifying device (T R ), for providing said power RF amplifying device with a DC power supply (V 0 ) at a voltage level proportional to an envelope (E) of said RF signal; wherein said switching device is a RF power transistor; characterized in that said rectifying device is also a transistor of a same technology, connected as a two-terminal device; and in that said switching device and rectifying device are discrete transistors mounted on respective metal support plates (B S , B R ) in electrical connection with their sources or emitters, said metal support plates being mounted face to face, either in direct electrical contact or connected through a capacitor (C) sandwiched between them.