1. School of Microelectronics, Dalian University of Technology, Dalian 116024, China
2. Institute of Microelectronics, Tsinghua University, Beijing 100084, China
3. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
4. State Key Laboratory of ASIC and Systems, Shanghai Institute of Intelligent Electronics & Systems, Fudan University, Shanghai 200433, China