DocumentCode :
1615306
Title :
Consideration of interference between parallel connected class D amplifiers operated at different switching frequencies
Author :
Ishikawa, Yozo ; Yamamoto, Ryo ; Uchiyama, Hiroyuki ; Wei, Xiuqin ; Sekiya, Hiroo ; Suetsugu, Tadashi
Author_Institution :
Dept. of Electron. Eng. & Comput. Sci., Fukuoka Univ., Fukuoka, Japan
fYear :
2013
Firstpage :
1034
Lastpage :
1037
Abstract :
Multi frequency coupling is widely used in plasma processing technology in order to improve controllability of plasma chamber. This paper researches about influence of multi-frequency operation of parallel connected high efficiency switching power amplifier, class D amplifiers. In the analysis, it is seen that variation in dc supply voltage of one amplifier leg does not influence to output waveform of another amplifier leg. However, parallel connection of two amplifiers influences output power of both amplifiers due to change in impedance of output filter. A decoupling filter is proposed to the output of higher frequency amplifier to reduce the coupling. It is shown that decoupling filter successfully improved coupling between amplifiers.
Keywords :
HF amplifiers; filters; power amplifiers; amplifier leg; dc supply voltage variation; decoupling filter; frequency amplifier; multifrequency coupling; parallel connected class D amplifiers; parallel connected high efficiency switching power amplifier; plasma chamber; plasma processing technology; switching frequency; Couplings; Integrated circuit modeling; Plasmas; Power amplifiers; Power engineering; Power generation; Radio frequency;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering, Energy and Electrical Drives (POWERENG), 2013 Fourth International Conference on
Conference_Location :
Istanbul
ISSN :
2155-5516
Type :
conf
DOI :
10.1109/PowerEng.2013.6635753
Filename :
6635753
Link To Document :
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