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1. US20170077875 - Doherty power amplifier and transmitter

Office United States of America
Application Number 15362502
Application Date 28.11.2016
Publication Number 20170077875
Publication Date 16.03.2017
Grant Number 10084413
Grant Date 25.09.2018
Publication Kind B2
IPC
H03F 3/68
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
68Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
H03F 1/02
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03F 3/21
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
H03F 3/189
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
189High-frequency amplifiers, e.g. radio frequency amplifiers
H03F 3/24
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
24of transmitter output stages
CPC
H03F 1/0288
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
0205in transistor amplifiers
0288using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
H03F 2200/411
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
411the output amplifying stage of an amplifier comprising two power stages
H03F 2203/21103
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
20Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
211using a combination of several amplifiers
21103An impedance adaptation circuit being added at the input of a power amplifier stage
H03F 2203/21106
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
20Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
211using a combination of several amplifiers
21106An input signal being distributed in parallel over the inputs of a plurality of power amplifiers
H03F 2203/21142
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
20Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
211using a combination of several amplifiers
21142Output signals of a plurality of power amplifiers are parallel combined to a common output
H03F 3/189
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
189High frequency amplifiers, e.g. radio frequency amplifiers
Applicants Huawei Technologies Co., Ltd.
Inventors Yongge Su
Lei Yang
Kun Wang
Agents Leydig, Voit & Mayer, Ltd.
Title
(EN) Doherty power amplifier and transmitter
Abstract
(EN)

A Doherty power amplifier (100) includes: a first amplification circuit (110), including a main power amplification branch and at least one auxiliary power amplification branch; a delay device (383), connected in the main power amplification branch; a combiner network (140), configured to: perform impedance inversion on the first amplification circuit (110), and couple an output end of the main power amplification branch and an output end of the at least one auxiliary power amplification branch to a load (160); and a first power divider (130), connected to an input end of the main power amplification branch and an input end of the at least one auxiliary power amplification branch, and configured to allocate an input signal of the first power divider (130) to the main power amplification branch and the at least one auxiliary power amplification branch.