US 11,894,808 B2
Power amplifier with variable bias impedance
Philip John Lehtola, Cedar Rapids, IA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Sep. 28, 2021, as Appl. No. 17/487,933.
Application 17/487,933 is a continuation of application No. 16/527,594, filed on Jul. 31, 2019, granted, now 11,165,392.
Claims priority of provisional application 62/713,150, filed on Aug. 1, 2018.
Prior Publication US 2022/0021340 A1, Jan. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/02 (2006.01); H03F 3/21 (2006.01); H03F 1/08 (2006.01); H03F 3/19 (2006.01); H03G 3/30 (2006.01)
CPC H03F 1/0205 (2013.01) [H03F 1/08 (2013.01); H03F 3/19 (2013.01); H03F 3/21 (2013.01); H03G 3/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power amplifier system comprising:
a bias circuit configured to receive a bias voltage and generate a bias signal;
at least one power amplifier stage configured to receive an input radio frequency signal and generate an output radio frequency signal; and
at least first and second bias impedance components operatively coupled between at least one bias circuit and at least one power amplifier stage, the first and second bias impedance components configured to bias the at least one power amplifier stage with a variable impedance based on a control signal that is received separately from the bias circuit, each of the at least first and second bias impedance components configured to receive the same control signal.