| 摘要 |
There is described a RF front end circuit comprising:
-a common impedance matching network (4) connected to an output terminal (5),
-a first power amplifier (1), PA, arranged to drive power to the output terminal through the common impedance matching network,
-a second PA (2) adapted to drive power to the output terminal through the common impedance matching network and a second impedance matching network (12),
-a reference terminal (9, 92) at a reference voltage (Vdd2),
the second impedance matching network comprising at least a first connection path to the reference terminal, a second connection path to the second PA and a third connection path to the common impedance matching network,
wherein, the second impedance matching network comprises a first impedance switch (SI1) configured to open the first connection path responsive to the second PA being put into an OFF state. |
