1. School of Integrated Circuits, Shenzhen Campus of Sun Yat-Sen University, Shenzhen, China
2. School of Integrated Circuit Science Engineering, Tianjin University of Technology, Tianjin, China
3. School of Microelectronics, Shaanxi Key Lab. of Integrated Circuits and Systems, Xidian University, Xi’an, China
4. Department of Electrical Engineering, Hanyang University, Ansan, South Korea