US 12,143,069 B2
Multi-level envelope tracking systems with adjusted voltage steps
Serge Francois Drogi, Flagstaff, AZ (US); and Florinel G. Balteanu, Irvine, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Aug. 8, 2023, as Appl. No. 18/446,073.
Application 18/446,073 is a continuation of application No. 17/456,952, filed on Nov. 30, 2021, granted, now 11,757,414.
Application 17/456,952 is a continuation of application No. 16/948,550, filed on Sep. 23, 2020, granted, now 11,223,325, issued on Jan. 11, 2022.
Claims priority of provisional application 62/906,932, filed on Sep. 27, 2019.
Prior Publication US 2023/0387859 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/30 (2006.01); H03F 1/02 (2006.01); H03F 3/195 (2006.01); H03F 3/24 (2006.01)
CPC H03F 1/0227 (2013.01) [H03F 3/195 (2013.01); H03F 3/245 (2013.01); H03F 2200/102 (2013.01); H03F 2200/171 (2013.01); H03F 2200/336 (2013.01); H03F 2200/451 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mobile device comprising:
a front end circuit including a first power amplifier configured to amplify a first radio frequency signal and to receive power from a first power amplifier supply voltage, and a second power amplifier configured to amplify a second radio frequency signal and to receive power from a second power amplifier supply voltage; and
a power management circuit that includes an envelope tracker including a first modulator configured to control the first power amplifier supply voltage based on a plurality of regulated voltages and a first envelope signal corresponding to an envelope of the first radio frequency signal, a second modulator configured to control the second power amplifier supply voltage based on the plurality of regulated voltages and a second envelope signal corresponding to an envelope of the second radio frequency signal, and a switching point adaptation circuit configured to control a voltage level of at least one of the plurality of regulated voltages based on a radio frequency power level.