Wan-De Weng1,2, Rui-Chang Lin1,3 and Chung-Ta Hsueh2
1Graduate School of Engineering Science and Technology
2Department of Electrical Engineering
National Yunlin University of Science and Technology
Yunlin, 640 Taiwan
E-mail: {wengwd, g9212718}@yuntech.edu.tw
3Department of Electronic Engineering
Nan Kai Institute of Technology
Nantou, 542 Taiwan
E-mail: rclin@nkc.edu.tw