US 12,068,765 B2
Envelope controlled radio frequency switches
Florinel G. Balteanu, Irvine, CA (US); Yu Zhu, Wellesley, MA (US); and Paul T. DiCarlo, Marlborough, MA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Jul. 25, 2022, as Appl. No. 17/814,671.
Application 17/814,671 is a continuation of application No. 16/946,835, filed on Jul. 8, 2020, granted, now 11,431,357.
Claims priority of provisional application 62/871,876, filed on Jul. 9, 2019.
Prior Publication US 2023/0082437 A1, Mar. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 1/04 (2006.01); H04B 1/00 (2006.01); H04B 1/10 (2006.01)
CPC H04B 1/0078 (2013.01) [H04B 1/0458 (2013.01); H04B 1/1027 (2013.01); H04B 2001/0408 (2013.01); H04B 2001/1063 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mobile device comprising:
an antenna; and
a front end system including a radio frequency switch configured to selectively provide a radio frequency signal to the antenna based on a first switch control signal, charge pump circuitry configured to generate a first regulated voltage based on an envelope signal indicating an envelope of the radio frequency signal and to generate a second regulated voltage, and a level shifter operable to level shift an input control signal to generate the first switch control signal, the level shifter configured to control a voltage level of the first switch control signal based on the first regulated voltage in a first state of the input control signal, and based on the second regulated voltage in a second state of the input control signal.