1. Design Technology Team, Memory Business, Samsung Electronics, Hwaseong, Korea
2. Department of Electrical Engineering, School of Electrical Engineering and Computer Science (SEECS), National University of Sciences and Technology (NUST), Islamabad, Pakistan
3. Department of Semiconductor Systems Engineering, Sungkyunkwan University, Suwon, Korea
4. School of Electrical and Electronic Engineering, Department of Systems Semiconductor Engineering and BK21 Graduate Program in Intelligent Semiconductor Technology, Yonsei University, Seoul, Korea