3導体伝送線回路の新理論―ノイズを物理により解明する―

抄録

Usually an electric circuit is placed in the circumstance, and the electric circuit always emits electromagnetic noise to the circumstance and receives noise from the circumstance. Previously, we did not understand how the electromagnetic noise is generated in the circuit. This is related with the fact that the existing multiconductor transmission-line theory is not arranged to treat the electromagnetic noise, and we cannot calculate the coupling of the transmission lines with the circumstance. We have constructed a new multiconductor transmission-line theory and understood the noise problem in terms of the theory. We show that usual electric circuits always emit and absorb noise. To cure this problem, we should introduce one more line (third line) to the electric circuit and use this line as the central line for symmetric arrangement of the power supplies and electric loads to minimize the noise. We can then construct an electric circuit, which is free from noise.