US 12,267,051 B2
Power amplifier system
Baker Scott, San Jose, CA (US); George Maxim, Saratoga, CA (US); Nadim Khlat, Cugnaux (FR); Chong Woo, Fremont, CA (US); and Jungmin Park, San Jose, CA (US)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Jan. 28, 2022, as Appl. No. 17/587,368.
Prior Publication US 2023/0246609 A1, Aug. 3, 2023
Int. Cl. H03F 1/32 (2006.01); H03F 1/56 (2006.01); H03F 3/24 (2006.01)
CPC H03F 3/245 (2013.01) [H03F 1/565 (2013.01); H03F 2200/222 (2013.01); H03F 2200/451 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A power amplifier system comprising:
a first amplifier having a first input and a first output;
a second amplifier having a second input and a second output; and
a reconfigurable switch network coupled between the first output, the second output, a fixed voltage node, and a radio frequency (RF) output, the reconfigurable switch network comprising a plurality of switch branches, wherein at least a first one of the plurality of switch branches comprises a first plurality of transistors stacked in series around an internal node to which a second one of the plurality of switch branches is coupled, wherein:
the first one of the plurality of switch branches having the first plurality of transistors stacked around the internal node is coupled between the first output and the second output; and
the second one of the plurality of switch branches is a series branch coupled between the internal node and the RF output.