[1] South China Univ Technol, Shien Ming Wu Sch Intelligent Engn, Guangzhou 511442, Peoples R China
[2] Univ Macau, Inst Microelect, State Key Lab Analog & Mixed Signal VLSI, Macau 999078, Peoples R China
[3] Univ Macau, Fac Sci & Technol, Dept Elect & Comp Engn, Macau 999078, Peoples R China