1. High-Frequency High-Voltage Device and Integrated Circuits R&D Center, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, China
2. University of Chinese Academy of Sciences, Beijing, China
3. Key Laboratory of Microelectronics Devices and Integrated Technology, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, China
4. Zhuzhou CRRC Times Electric Co., Ltd., Zhuzhou, China