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. |
主权项 |
1. A Radio Frequency, RF, front end circuit comprising:
an output terminal, a common impedance matching network connected to the output terminal, a first power amplifier, PA, coupled to the common impedance matching network, arranged to drive power to the output terminal through the common impedance matching network, a second PA coupled to the common impedance matching network through a second impedance matching network, and adapted to drive power to the output terminal through the common impedance matching network, a reference terminal at a reference voltage,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 configured to open the first connection path between the second impedance matching network and the reference terminal responsive to the second PA being put into an OFF state. |