US 12,126,307 B2
Power amplifier modules with controllable envelope tracking noise filters
Florinel G. Balteanu, Irvine, CA (US); Serge Francois Drogi, Flagstaff, AZ (US); Robert John Thompson, Cedar Rapids, IA (US); Shayan Farahvash, Kensington, CA (US); David Richard Pehlke, Westlake Village, CA (US); and Stephan Henzler, Munich (DE)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Aug. 16, 2021, as Appl. No. 17/445,179.
Claims priority of provisional application 62/706,579, filed on Aug. 26, 2020.
Prior Publication US 2022/0069775 A1, Mar. 3, 2022
Int. Cl. H03F 1/30 (2006.01); H03F 1/02 (2006.01); H03F 3/24 (2006.01); H04B 1/40 (2015.01)
CPC H03F 1/0238 (2013.01) [H03F 3/245 (2013.01); H04B 1/40 (2013.01); H03F 2200/105 (2013.01); H03F 2200/165 (2013.01); H03F 2200/451 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mobile device comprising:
a transceiver configured to generate a radio frequency signal;
a power management system including an envelope tracker configured to generate a power amplifier supply voltage that changes in relation to an envelope of the radio frequency signal, the envelope tracker including a DC-to-DC converter configured to output a plurality of regulated voltages, a modulator configured to generate a modulator output voltage at an output based on the plurality of regulated voltages and the envelope of the radio frequency signal, and a modulator output filter coupled between the output of the modulator and the power amplifier supply voltage; and
a power amplifier module including a power amplifier configured to amplify the radio frequency signal and to receive power from the power amplifier supply voltage, the power amplifier module further including a controllable filter configured to filter the power amplifier supply voltage.