1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
2. Analog and Logic IC Department, Nexperia Research and Development Penang, SAINS at USM, Bukit Jambul, Malaysia
3. State-Key Laboratory of Analog and Mixed-Signal VLSI-IME/DECE-FST, University of Macau, Macau, China