US 12,191,814 B2
Multi-mode power amplifier apparatus
Nadim Khlat, Cugnaux (FR)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Appl. No. 17/637,056
Filed by Qorvo US, Inc., Greensboro, NC (US)
PCT Filed Aug. 19, 2020, PCT No. PCT/US2020/046895
§ 371(c)(1), (2) Date Feb. 21, 2022,
PCT Pub. No. WO2021/034878, PCT Pub. Date Feb. 25, 2021.
Claims priority of provisional application 62/890,093, filed on Aug. 22, 2019.
Prior Publication US 2022/0302879 A1, Sep. 22, 2022
Int. Cl. H04B 1/04 (2006.01); H03F 1/02 (2006.01); H03F 3/24 (2006.01); H04B 1/02 (2006.01); H04B 1/18 (2006.01)
CPC H03F 1/0233 (2013.01) [H03F 3/245 (2013.01); H04B 1/04 (2013.01); H03F 2200/105 (2013.01); H03F 2200/451 (2013.01); H04B 2001/0433 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A multi-mode power amplifier apparatus comprising:
a first power amplifier configured to amplify a first composite signal comprising at least one radio frequency (RF) signal;
a second power amplifier configured to amplify a second composite signal comprising the at least one RF signal;
an output circuit configured to regenerate the at least one RF signal from the first composite signal and the second composite signal;
a first signal output and a second signal output configured to output the at least one RF signal; and
a control circuit configured to change a load impedance at one or more of the first signal output and the second signal output based on a modulation bandwidth of the RF signal to thereby cause the multi-mode power amplifier apparatus to operate in one of an envelope tracking (ET) mode and a hybrid mode.