1. Department of Electronics Engineering and Computer Science, Tung-Fang Design Institute, Kaohsiung, Taiwan, R.O.C.
2. Department of Electronic Engineering, Southern Taiwan University of Science and Technology, Tainan, Taiwan, R.O.C.
3. Graduate School of Electronic and Optoelectronic Engineering, National Yunlin University of Science and Technology, Yunlin, Taiwan, R.O.C.