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1. US20100327969 - Power amplifier having parallel amplification stages and associated impedance matching networks

Office United States of America
Application Number 12494414
Application Date 30.06.2009
Publication Number 20100327969
Publication Date 30.12.2010
Grant Number 07944291
Grant Date 17.05.2011
Publication Kind B2
IPC
H03F 1/14
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
08Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
14by use of neutralising means
Applicants Avago Technologies Wireless IP (Singapore) Pte. Ltd.
Inventors Jung Joo Min
Jeon Moon Suk
Jung Sang Hwa
Kim Jung Hyun
Title
(EN) Power amplifier having parallel amplification stages and associated impedance matching networks
Abstract
(EN)

An amplification device includes a series combination of a driver stage, an output terminal matching network, and a secondary amplification stage. The driver stage includes a driver amplifier and an output matching network. The secondary amplification stage includes a parallel combination of an impedance transformation network and a main amplification stage. The main amplification stage includes a plurality of main amplification branches in parallel with each other, and an input matching network in series with the parallel combination. Each main amplification branch includes a main amplifier, and input and output impedance matching networks. A control circuit supplies activation signals to the main amplification branches to selectively turn them on and off. The device has no switches in the path of the signal that is amplified. In at least one operating mode, the control circuit turns on at least two of the main amplification branches at the same time.