The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2025
Filed:
Apr. 18, 2023
Apple Inc., Cupertino, CA (US);
Fei Wang, Santa Clara, CA (US);
Xiang Guan, Santa Clara, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
This disclosure is directed to a series Doherty power amplifier including two-transformers. The series Doherty combiner may include a first branch including a main amplifier and a first transformer coupled to a load. In particular, a primary inductor of the first transformer may be coupled to the main amplifier and a secondary inductor of the first transformer may couple to the load. The series Doherty combiner may also include a second branch including an auxiliary amplifier and a second transformer coupled to the secondary inductor of the first transformer. The second transformer may couple to the load via the secondary inductor of the first transformer. As such, the load is coupled in series to the first branch and is coupled in series to the second branch. Moreover, the load is coupled in shunt to the main amplifier and the auxiliary amplifier.