[1] Fundamental R and D Division, Engineering Operations Headquarters, TOYOCOM Devices, 2-1-1 Koyato, Samukawa, Koza, Kanagawa 253-0192, Japan
[2] GPHSFSE, Grad. Sch. of Sci. and Eng., Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
[3] Department of Electrical Engineering, Faculty of Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan