DocumentCode
3151757
Title
Envelope tracking power amplifier robust to battery depletion
Author
Choi, Jang-Young ; Kim, Dongkyu ; Kang, Dong-Hyung ; Park, Jongho ; Jin, Boyuan ; Kim, Bumki
Author_Institution
Pohang University of Sceinece and Technology, Republic of Korea
fYear
2010
fDate
23-28 May 2010
Firstpage
1
Lastpage
1
Abstract
A wideband envelope tracking power amplifier, which is robust to battery depletion, is introduced. An integrated boost converter keeps a stable operation of the PA supply modulator. Even at the battery depletion from 4.2V to 2.8V, there is no significant degradation of output power and linearity in the power amplifier. Moreover, the efficiency degradation by the additional regulator is minimized for the novel supply modulator architecture proposed in this work. The fabricated 2.535GHz envelope tracking power amplifier presents max/min power-added efficiencies of 32.3/26.2% for 10MHz BW 3GPP LTE standard along the battery voltage from 4.2V to 2.8V.
Keywords
Batteries; Broadband amplifiers; Degradation; Integrated circuit technology; Microwave amplifiers; Microwave circuits; Microwave technology; Power amplifiers; Power generation; Robustness;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location
Anaheim, CA
ISSN
0149-645X
Print_ISBN
978-1-4244-6056-4
Electronic_ISBN
0149-645X
Type
conf
DOI
10.1109/MWSYM.2010.5518021
Filename
5518021
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