1. School of Mechanical and Electronical Engineering, Chuzhou University, Chuzhou 239000, China
2. Changxin Memory Technologies Inc., Hefei 230601, China
3. The 50th Research Institute of China Electronics Technology Group Corporation, Shanghai 200331, China
4. State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, China