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. 05, 2017
Filed:
Aug. 26, 2016
Freescale Semiconductor, Inc., Austin, TX (US);
Abdulrhman M. S. Ahmed, Gilbert, AZ (US);
Joseph Staudinger, Gilbert, AZ (US);
Ebrahim Al Seragi, Mesa, AZ (US);
NXP USA, Inc., Austin, TX (US);
Abstract
A series-type Doherty amplifier circuit includes a first amplifier, a second amplifier, and a directional coupler. The first amplifier is of a first type and has an input for receiving a radio frequency input signal, and an output. The second amplifier is of a second type and has an input and an output. The directional coupler has a first terminal coupled to the output of the first amplifier, a second terminal coupled to the input of the second amplifier, and a third terminal coupled to the output of the second amplifier for providing a radio frequency output signal. The series-type Doherty amplifier circuit may also include variable phase and attenuation circuits for adjusting the phase and attenuation of input signal for the second amplifier. The ability to adjust phase and attenuation allows high operating efficiency for any saturation power level.