1. School of Microelectronic, University of Science and Technology of China, East China Research Institute of Electronic Engineering,Hefei,China
2. East China Research Institute of Electronic Engineering,Department of Microelectronic,Hefei,China
3. School of Electronic Information and Electric Engineerin, Shanghai Jiao Tong University,Shanghai,China
4. School of Information Science and Technology, University of Science and Technology of China,Hefei,China
5. School of Microelectronic, University of Science and Technology of China,Hefei,China
6. University of Texas at San Antonio San,Department of Electrical and Computer Engineering,Antonio,USA