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This paper proposes a novel analysis method of bus signal transmission and a high-speed bus circuit with low-power consumption. The novel analysis method utilizes the relation between frequency responses of a bus circuit and pulse waveform distortions when the signal is transmitted on the bus circuit. The proposed analysis method is used to find out the worst case of the bus transmission and to enable the SPICE simulation of bus circuits at the maximum transfer rate, which was evaluated by examining a conventional driver-end terminated bus circuit. The proposed high-speed low-power bus circuit is a looped bus circuit with non-power-dissipated terminations. The proposed bus circuit can achieve data transmission at 400M transfer/s, while the conventional driver-end terminated bus circuit transmits at below 160M transfer/s.