Patent ID: 9590569
Date: 2017-03-07
CPC Classifications: H03F

Claim:
1. A power-amplifier (PA) system comprising: a first amplification path having one or more PAs configured to generate a high power radio-frequency (RF) signal from an input RF signal when in a high power mode; a second amplification path having one or more PAs configured to generate a low power RF signal from the input RF signal when in a low power mode; a routing circuit configured to receive and route the input RF signal to the first amplification path or the second amplification path; and a switching circuit including a first pole coupled to the first amplification path and a second pole coupled to the second amplification path, the switching circuit configured to route the high power RF signal through the first pole or the low power RF signal through the second pole to a selected output path among a plurality of output paths corresponding to a plurality of operating bands.