Patent ID: 9590689
Date: 2017-03-07
CPC Classifications: H04B

Claim:
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, and configured 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 configured to drive power to the output terminal through the common impedance matching network; and a reference terminal at a reference voltage, wherein the second impedance matching network includes 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, and the second impedance matching network includes 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.