Title :
A GSM Power Amplifier Directly-Powered From a DC-DC Power Converter
Author :
Tao, Chengwu ; Fayed, Ayman A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
A commercial off-the-shelf GSM PA powered directly from a DC-DC converter is presented. The converter is implemented in 0.35 μm CMOS and employs frequency hopping with phase chopping to eliminate spurious noise. Measurement results demonstrate elimination of spurs, allowing an incompliant GSM PA that is violating the limits of the GSM spectral mask by 9.3 dB to be brought back to compliance without additional filtering or linear regulation between the converter and the PA.
Keywords :
CMOS analogue integrated circuits; DC-DC power convertors; cellular radio; power amplifiers; CMOS; DC-DC power converter; GSM power amplifier; GSM spectral mask; commercial off-the-shelf GSM PA; frequency hopping; phase chopping; size 0.35 mum; Frequency conversion; Frequency shift keying; GSM; Noise; Power generation; Switches; Buck converters; DC-DC converters; power amplifiers; switching regulators;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2011.2176477
