1. Peng Cheng Laboratory Shenzhen 518000 China
2. Frontier Institute of Chip and System State Key Laboratory of Integrated Chips and Systems Zhangjiang Fudan International Innovation Center Fudan University Shanghai 200433 China
3. Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 China
4. Dipartimento di Elettronica Informazione e Bioingegneria Politecnico di Milano 20133 Milano Italy