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:
Dec. 15, 2020
Filed:
Oct. 29, 2019
Nxp Usa, Inc., Austin, TX (US);
Ramanujam Srinidhi Embar, Gilbert, AZ (US);
Roy McLaren, Gilbert, AZ (US);
NXP USA, Inc., Austin, TX (US);
Abstract
A Doherty power amplifier includes input circuitry that provides input signals to carrier and peaking amplifiers with an input phase offset between 20 degrees and 160 degrees. Carrier and peaking amplifier output signals are combined at a combining node. A complex combining load matching circuit, which is connected to the combining node, consists of two, series-connected transmission line segments. The matching circuit provides a complex impedance, ZL, with a non-zero reactive portion, xn. The output circuit between the peaking amplifier and the combining node has an electrical length of 0 or n*180 degrees (n=an integer value). The output circuit between the carrier amplifier and the combining node has an electrical length, θx, equal to an absolute value of the input phase offset when the electrical length of the peaking output circuit is 0 degrees.