1. Soft I/O
Interface Research Section, Electronics and Telecommunications Research Institute, Daejeon 34129, Republic of Korea
2. Display and Nanosystem Laboratory, College
of Engineering, Korea University, Seoul 136-713, Republic of Korea
3. Research Institute of Electrical
Communication, Tohoku University, Sendai, Miyagi 980-8577, Japan
4. School
of Electrical Engineering, Pusan National University, Pusan (Busan) 609-735, Republic of Korea