학술논문
CMOS Outphasing Class-D Amplifier With Chireix Combiner
Document Type
Periodical
Author
Source
IEEE Microwave and Wireless Components Letters IEEE Microw. Wireless Compon. Lett. Microwave and Wireless Components Letters, IEEE. 17(8):619-621 Aug, 2007
Subject
Language
ISSN
1531-1309
1558-1764
1558-1764
Abstract
This letter presents a CMOS outphasing Class-D power amplifier (PA) with a Chireix combiner. Two voltage-mode Class-D amplifiers used in the outphasing system were designed and implemented with a 0.18-$\mu$ m CMOS process. By applying the Chireix combiner technique, drain efficiency of the outphasing PA for CDMA signals was improved from 38.6% to 48% while output power was increased from 14.5 to 15.4 dBm with an adjacent channel power ratio of $-$45 dBc.