US 12,395,134 B2
Phase shift matching for multi-path amplifiers
Parvez Daruwalla, San Diego, CA (US); Phanindra Yerramilli, San Diego, CA (US); and Emre Ayranci, Costa Mesa, CA (US)
Assigned to PSEMI CORPORATION, San Diego, CA (US)
Filed by pSemi Corporation, San Diego, CA (US)
Filed on Oct. 24, 2022, as Appl. No. 18/049,002.
Application 18/049,002 is a continuation in part of application No. 17/240,852, filed on Apr. 26, 2021, granted, now 11,967,935.
Prior Publication US 2023/0148375 A1, May 11, 2023
Int. Cl. H03F 1/22 (2006.01); H03F 3/193 (2006.01); H03F 3/195 (2006.01); H04B 1/12 (2006.01)
CPC H03F 3/195 (2013.01) [H03F 1/223 (2013.01); H03F 3/193 (2013.01); H04B 1/123 (2013.01); H03F 2200/372 (2013.01); H03F 2200/451 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A multi-path radio frequency (RF) front-end comprising:
a plurality of first path elements forming a first path extending between an input node and an output node of the RF front end while the RF front-end is operating in a first mode, the first path elements including a first phase shifter providing a first phase shift;
a plurality of second path elements forming a second path extending between the input node and the output node of the RF front end while the RF front-end is operating in a second mode, the second path elements including a second phase shifter providing a second phase shift;
the RF front-end providing a first output signal at the output node while the RF front-end is operating in the first mode, the first output signal having a first output signal phase shift relative to an input signal applied to the input node;
the RF front-end providing a second output signal at the output node while the RF front-end is operating in the second mode, the second output signal having a second output signal phase shift relative to an input signal applied to the input node;
the first phase shift and the second phase shift being selected so that the first output signal and the second output signal are substantially in phase.