The analysis of the waveform distortion caused by the characteristic of the signal transmission line and the proposal of high-speed bus circuit with low-power-dissipation

Abstract

A high-speed bus circuit with low-power-consumption has been required among computer systems, especially in mobile use. This paper proposes an efficient and effective method to improve the analysis of bus circuits to be adapted to a higher-speed transmission with low-power-consumption. The proposed method is made by analyzing pulse waveform distortion focusing the relationship between the harmonics of the fundamental frequency of the pulses and the frequency response of transmission line. Further, in this paper, the looped bus circuit with non-power-consuming termination is proposed, which can improve the waveform distortion dramatically and realize both high-speed and low-power-consumption even at the system that the location of a driver is changed among IC's connected on the bus line. The looped bus circuit with non-power-consuming termination proposed by authors can achieve a data transmission rate 400M transfer/s, whereas conventional bus circuits are below 100_??_200M transfer/s, verified by the above proposed method, SPICE simulation and experiment.