DocumentCode
1523731
Title
High bandwidth current mode amplifier for envelope modulated RF amplifiers
Author
Watkins, Gavin T.
Author_Institution
Toshiba Res. Eur. Ltd., Bristol, UK
Volume
46
Issue
13
fYear
2010
Firstpage
894
Lastpage
895
Abstract
A high bandwidth discrete current mode amplifier capable of driving large voltages into low impedances is presented. A differential current mirror output stage ensures stability at high frequencies. Small signal bandwidth is 24 MHz and large signal bandwidth extends into the megahertz region. When amplifying the AC component of a 3 MHz 3rd generation partnership project (3GPP) long term evolution (LTE) envelope signal, an efficiency of 19.1% is achieved at 18.8 V peak-to-peak output across a 15 Ω load.
Keywords
3G mobile communication; circuit stability; current mirrors; current-mode circuits; electric impedance; radiofrequency amplifiers; 3GPP LTE envelope signal; 3rd generation partnership project long term evolution envelope signal; AC component; bandwidth 24 MHz; differential current mirror output stage; envelope modulated RF amplifier; frequency 3 MHz; high bandwidth discrete current mode amplifier; low impedance; megahertz region; signal bandwidth; stability; voltage 18.8 V;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2010.1376
Filename
5493516
Link To Document