Verstärkungsschaltung mit Leistungsoptimierung

Details

Veröffentlichungs-Nr.

EP2482449

Aktenzeichen

EP11368002

Anmeldetag

27. Januar 2011

Veröffentlichung

20. März 2019

Erteilung

20. März 2019

Rechtsraum

EP

IPC

H03F1/02H03F3/193H03F3/21H03F3/72

Abstract

A Power amplifier circuit comprising an input (100), an output (700) comprising; - means for sensing (131, 132, 133) the input voltage; - a set of n cascode circuits, each comprising a first transistor (110-1, 110-2, ... 110-n) having a gate, a source and a drain terminal and further comprising a second transistor (120-1, 120-2, ... 120-n) having gate, source and drain terminal; the source and gate of the first transistor of said cascode circuits being respectively connected to a first reference voltage (GND) and to receive the input signal (RFin), the drain of said first transistor being connected to the source of said second transistor, the drain of which being coupled to said output (700); - a control ciurcuit (150) receiving the input voltage sensed by said sensing means (131, 132, 133) for generating a set of control signals which are transmitted to the gate of the second transistor of said n cascode circuits; By activating or disactivating one or more of the n cascode circuits, the total size of the amplification components can be adapted to the value of the output power to generate.

Anmelder

Firmen

Telefonaktiebolaget LM Ericsson (publ)
OCT Circuit Technologies International Limited
ST-Ericsson SA

Land

🇸🇪 Schweden

Fachgebiete