US 12,301,180 B2
Stacked power amplifiers with DC current reuse
David Richard Pehlke, Westlake Village, CA (US); and Gregory Edward Babcock, Ottawa (CA)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Jan. 27, 2022, as Appl. No. 17/586,095.
Claims priority of provisional application 63/199,880, filed on Jan. 29, 2021.
Prior Publication US 2022/0247365 A1, Aug. 4, 2022
Int. Cl. H03F 3/195 (2006.01); H03F 3/24 (2006.01); H04B 1/04 (2006.01); H04B 1/3827 (2015.01)
CPC H03F 3/195 (2013.01) [H03F 3/245 (2013.01); H04B 1/04 (2013.01); H04B 1/3833 (2013.01); H03F 2200/451 (2013.01); H04B 2001/0408 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mobile device comprising:
a transceiver configured to generate a first radio frequency input signal and a second radio frequency input signal; and
a front end system including a stacked power amplifier configured to receive power from a power high supply voltage and a power low supply voltage, the stacked power amplifier including a first power amplifier configured to amplify the first radio frequency input signal and a second power amplifier configured to amplify the second radio frequency input signal, the first power amplifier and the second power amplifier electrically connected in a stack between the power high supply voltage and the power low supply voltage and configured to operate with a shared DC bias current.