Radio-frequency power amplifier with fast envelope tracking

Nicolas Le Gallou (1) , Christophe Delepaut (1) , David Sardin (2) , Michel Campovecchio (2)

1 ESTEC - European Space Research and Technology Centre
2 XLIM-C2S2 - C2S2

A radio-frequency power amplifier with envelope tracking, comprising: a power RF amplifying device for amplifying a RF signal; and a switching DC/DC converter, comprising a switching device and a rectifying device, for providing said power RF amplifying device with a DC power supply at a voltage level proportional to an envelope of said RF signal; wherein said switching device is a RF power transistor; characterized in that said rectifying device, and preferably also said power RF amplifying device, is also a transistor of a same technology, connected as a two-terminal device. Preferably, said power RF amplifying device is also a transistor of said same technology. A low-pass filter can also be provided for reducing the bandwidth of the envelope signal on which the PWM signal driving the DC/DC converter depends.

Domaines: Electronique

Nicolas Le Gallou, Christophe Delepaut, David Sardin, Michel Campovecchio. Radio-frequency power amplifier with fast envelope tracking. United States, Patent n° : US 8669811 B2. 2014. ⟨hal-01138141⟩