Solitary Electromagnetic Wave Theory and Lossy Line Technologies for Switching Mode Circuit

The electric or electronics circuit engineers are addressing many kinds of the difficult problems whenever the development of the equipment and the systems. Among them, EMI including SI (signal integrity) and timing control of the signals are the typical highly difficult problems of the digital circuit as shown in the first half in detail. The solitary electromagnetic wave (SEMW) theory and the lossy line technologies were developed for the solution of these problems. Development process of SEMW theory, outline of it, and some application examples of it about the digital circuit that is the typical switching mode circuit (SMC) are presented. SMC consists of switching transistor, power line, and signal line. It is expected that the electromagnetic wave will be generated by the switching transistor. Therefore, the current of switching transistor was analysed in accordance with semiconductor physics. Applying non-linear wave physics and electromagnetic physics to this result, SEMW theory was developed. It will supplement the conventional electromagnetic physics and will help the great progress of IT in the future. According to the solitary electromagnetic wave (SEMW) theory, it is estimated that the transmission loss is useful to improve the performance and stabilizing the operation of the switching mode circuit (SMC) including the digital circuit. The validation result of the excellent effect of transmission loss at the digital circuit by experiment and calculation are presented. The lossy line technologies will also solve many problems about the wiring of system on a chip (SoC) Suitable material for on-chip interconnects has been believed to be the low resistive conductor by basing on the AC circuit theory of engineering. On the other hand, according to the solitary electromagnetic wave (SEMW) theory, it is clarified that the lossy transmission line is contrarily suitable for the signal line of the switching mode circuit (SMC) including the digital circuit. Therefore, the effects when the wire with relatively low conductivity is used to the signal interconnects was analysed based on the SEMW theory. At last, the design examples of the quasi-stationary state closed circuit (QSCC) were Shown.