Solitary Electromagnetic Waves Generated by the Switching Mode Circuit

Abstract

The switching mode circuit (SMC) performs by the switching transistor or the other switching devices. Usually, unlike the distorted continuous signal voltage on the linear circuit, the signal voltage of the SMC has two stationary states. The SMC has been applied widely to the power circuit and the signal circuit including the digital circuit now. The performance of the SMC has been supported by the improvement of the semiconductors. For example, the International Technology Roadmap for Semiconductors (ITRS) is showing the details of the technology trend of the worldwide semiconductors [1]. According to the ITRS, the technology about the high performance system on a chip (SoC) or the VLSI has been improved to 45nm from 78nm in the last five years. However the gate delay of the PMOS FET stays between 1.65ps and 1.73ps, and is increasing slightly. In addition, the improvement of the on-chip clock frequency is staying in 5-6GHz approximately. Many results of the research about the on-chip interconnect were presented [2, 3]. The themes of these studies are the influence of the resistance, the parasitic capacitances, the power noise, the substrate noise, and others to the performance of the SoC [4, 5]. Meanwhile, the on-chip transmission line interconnect [6, 7] and the optical interconnect [8] were proposed for improving the performance of the SoC. Many results of the study of the power distribution network (PDN) about the EMI also were presented [9-14]. The relevant papers which include above ones and the conventional theories were discussed from the point of view of the stagnation of the performance of the SoC and the suppression of the EMI of the SMC. Concurrently, the development of the theory and the technologies suitable to the SMC was started. As a result, the solitary electromagnetic wave (SEMW) theory and the technologies of the low impedance lossy line (LILL) and the matched impedance lossy line (MILL) were successfully developed. These are presented below together with the result of the analysis, experiments, and the review of the conventional theory and engineering.