US 12,316,355 B2
Reconfigurable output balun for wideband push-pull power amplifiers
Kunal Datta, Sunnyvale, CA (US); Hemin Wu, San Jose, CA (US); Shanshan Zhao, San Jose, CA (US); Sheikh Nijam Ali, San Jose, CA (US); and Jinghang Feng, San Jose, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Jul. 11, 2022, as Appl. No. 17/811,659.
Claims priority of provisional application 63/203,502, filed on Jul. 26, 2021.
Prior Publication US 2023/0024830 A1, Jan. 26, 2023
Int. Cl. H04B 1/04 (2006.01); H03F 3/21 (2006.01); H03F 3/26 (2006.01)
CPC H04B 1/04 (2013.01) [H03F 3/211 (2013.01); H03F 3/265 (2013.01); H04B 2001/0416 (2013.01); H04B 2001/0433 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A push-pull power amplifier comprising:
an input selection circuit configured to output a selected radio frequency signal based on a band control signal, the selected radio frequency signal chosen from one of a first radio frequency signal of a first frequency band or a second radio frequency signal of a second frequency band;
an input balun;
a pair of amplifiers including a pair of inputs connected to the input balun and a pair of outputs, the pair of amplifiers operable to amplify the selected radio frequency signal; and
an output balun connected to the pair of outputs of the pair of amplifiers, the band control signal operable to control an impedance of the output balun.