Patent ID: 8897730

Claim:
An apparatus comprising: a first amplifier configured to receive a first radio frequency (RF) signal and to amplify the first RF signal on a first path during a first mode of the apparatus; a second amplifier configured to receive a second RF signal and to amplify the second RF signal on a second path during a second mode of the apparatus, wherein the second amplifier has a different gain than the first amplifier, and wherein the first and second paths intersect at a junction node; a switching device coupled with the second amplifier to switch the apparatus between the first mode and the second mode; and a matching circuit coupled between the junction node and the second amplifier to: convert, at a fundamental frequency of the second RF signal, an output impedance at an output terminal of the second amplifier to a junction impedance at the junction node; and present an open circuit at a third harmonic of the first RF signal.