DocumentCode
2867438
Title
Combined Linear and Δ-Modulated Switched-Mode PA Supply Modulator for Polar Transmitters
Author
Kitchen, Jennifer ; Chu, Wing-Yee ; Deligoz, Iiker ; Kiaei, Sayfe ; Bakkaloglu, Bertan
Author_Institution
Arizona State Univ., Tempe, AZ
fYear
2007
fDate
11-15 Feb. 2007
Firstpage
82
Lastpage
588
Abstract
A combined linear and Δ-modulated switched-mode PA supply modulator for polar transmitters is designed in a 0.25μm CMOS process. The modulator follows the input envelope and achieves 20dB output DR, a maximum efficiency of 75.5%, and 75dB SNDR for envelope signals up to 4MHz occupied RF BW. For a 1625kb/s 8PSK RF input at 900MHz, polar modulation of a GSM-900 PA provides 10dB ACPR improvement.
Keywords
power amplifiers; switched mode power supplies; 0.25 micron; 900 MHz; polar modulation; polar transmitters; switched-mode PA supply modulator; Bandwidth; Buck converters; Digital modulation; Power generation; Power supplies; Regulators; Signal processing; Switching converters; Transmitters; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid-State Circuits Conference, 2007. ISSCC 2007. Digest of Technical Papers. IEEE International
Conference_Location
San Francisco, CA
ISSN
0193-6530
Print_ISBN
1-4244-0852-0
Electronic_ISBN
0193-6530
Type
conf
DOI
10.1109/ISSCC.2007.373598
Filename
4242275
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