The switching mode circuit (SMC) is being used in almost all electronics equipment. This book presents the theories and the technologies based on the novel solitary electromagnetic wave theory for the analysis and design of SMCs. Conventional theories and technologies are also presented for better understanding the comparative differences between the design implications for SMCs. This book presents the ultimate solution for the electromagnetic interference problems encountered while designing a switching mode circuit - including EMC, crosstalk, bounce, spike, and other signal integrity items except the low frequency phenomenon which is caused in the lower band range (approximately less than one megahertz). The book will benefit a wide range of readers. Students of advanced physics and electronics courses can learn the physics behind electric circuits and acquire knowledge of the application of electromagnetic wave theory principles in the construction of AC circuits. Professors and researchers alike can improve their knowledge of SMCs. This reference also presents professional Engineers with an opportunity to gain knowledge of developing a variety of commercially viable SMC based devices including high performance electromagnetic wave simulators, power components, ICs, PCBs and much more.