1Fukuda H, Takano H, Hatakeyama T, et al. A unique digital control scheme of multiple bridges power conversion circuit for advanced magnetic resonance imaging. IEE Power Electronics and Variable Speed Drives Conference Proceeding, Sept. 1996:366~371
2Flinders F M, Wolfs P J,Kwong K C. Improved techniques for switching Power Amplifiers. IEEE Trans. on Power Electronics, 1993,8(4):673-679