US 11,728,773 B2
Apparatus and methods for bias switching of power amplifiers
Netsanet Gebeyehu, San Jose, CA (US); Srivatsan Jayaraman, Santa Clara, CA (US); and Edward James Anthony, Robins, IA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Jun. 14, 2022, as Appl. No. 17/806,854.
Application 17/806,854 is a continuation of application No. 17/249,185, filed on Feb. 23, 2021, granted, now 11,394,347.
Application 17/249,185 is a continuation of application No. 16/867,821, filed on May 6, 2020, granted, now 10,958,218, issued on Mar. 23, 2021.
Application 16/867,821 is a continuation of application No. 15/941,464, filed on Mar. 30, 2018, granted, now 10,666,200, issued on May 26, 2020.
Claims priority of provisional application 62/481,368, filed on Apr. 4, 2017.
Prior Publication US 2022/0311386 A1, Sep. 29, 2022
Int. Cl. H03F 3/04 (2006.01); H03F 1/02 (2006.01); H03F 3/193 (2006.01); H03F 3/19 (2006.01); H03F 3/24 (2006.01); H03F 1/56 (2006.01); H03F 3/195 (2006.01); H04B 1/04 (2006.01); H04B 1/3827 (2015.01); H01L 25/065 (2023.01); H03F 1/30 (2006.01); H03F 3/191 (2006.01)
CPC H03F 1/0216 (2013.01) [H03F 1/0227 (2013.01); H03F 1/0266 (2013.01); H03F 1/56 (2013.01); H03F 3/19 (2013.01); H03F 3/193 (2013.01); H03F 3/195 (2013.01); H03F 3/24 (2013.01); H03F 3/245 (2013.01); H04B 1/04 (2013.01); H01L 25/0655 (2013.01); H01L 2224/16227 (2013.01); H01L 2224/48227 (2013.01); H01L 2924/15313 (2013.01); H01L 2924/19041 (2013.01); H01L 2924/19042 (2013.01); H01L 2924/19043 (2013.01); H01L 2924/19105 (2013.01); H03F 1/302 (2013.01); H03F 3/04 (2013.01); H03F 3/191 (2013.01); H03F 2200/102 (2013.01); H03F 2200/105 (2013.01); H03F 2200/222 (2013.01); H03F 2200/318 (2013.01); H03F 2200/336 (2013.01); H03F 2200/451 (2013.01); H04B 1/3827 (2013.01); H04B 2001/045 (2013.01); H04B 2001/0416 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mobile device comprising:
a power amplifier including an amplification transistor having an input configured to receive a radio frequency signal, a first bias network electrically connected to the input of the amplification transistor, and a second bias network electrically connected to the input of the amplification transistor;
a bias control circuit including a first switch, a first reference current source configured to provide a first reference current to the first bias network through the first switch, a second switch, and a second reference current source configured to provide a second reference current to the second bias network through the second switch; and
a power management circuit configured to control a voltage level of a supply voltage of the power amplifier, the power management circuit operable in a first mode and a second mode.