US 12,407,306 B2
Radio frequency front end with integrated channel matching calibration
Guillaume Alexandre Blin, Carlisle, MA (US); Bang Li Liang, Ottawa (CA); and Thomas Obkircher, Santa Ana, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Aug. 4, 2022, as Appl. No. 17/817,453.
Claims priority of provisional application 63/203,913, filed on Aug. 4, 2021.
Prior Publication US 2023/0038733 A1, Feb. 9, 2023
Int. Cl. H03F 3/19 (2006.01); H03G 3/30 (2006.01); H04B 1/40 (2015.01)
CPC H03F 3/19 (2013.01) [H03G 3/3036 (2013.01); H04B 1/40 (2013.01); H03F 2200/451 (2013.01); H03G 2201/103 (2013.01); H03G 2201/307 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A front end system comprising:
a plurality of front end amplification chains including transmit and receive chains for at least two radio frequency bands, each of the front end amplification chains configured to either transmit or receive radio frequency signals via one of a plurality of antennas, and each of the front end amplification chains further including an amplifier configured to amplify the corresponding radio frequency signal;
a control circuit configured to generate a bias current; and
a multiplexor configured to receive the bias current from the control circuit and provide the bias current to a selected one of the amplifiers.