1. Institute of Microelectronics, State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macau 999078, China
2. Department of Electrical Engineering-MNS, University of Leuven, 3000 Leuven, Belgium
3. School of Physics and Information Engineering, Jiangsu Second Normal University, Nanjing 210013, China
4. MOE Key Laboratory of Fundamental Physical Quantities Measurement, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China