The Journal of King Mongkut's University of Technology North Bangkok
วารสารวิชาการพระจอมเกล้าพระนครเหนือ

Samruan Wiangsamut
Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen
Thailand

Nawapak Eua-Anant
Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen
Thailand

Wutthichai Phornphatcharaphong
Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen
Thailand