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An Active Pulse Transmission Line Simulating Nerve Axon

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3 Author(s)
Nagumo, J. ; Dept. of Applied Physics, Faculty of Engineering, University of Tokyo, Tokyo, Japan ; Arimoto, S. ; Yoshizawa, S.

To electronically simulate an animal nerve axon, the authors made an active pulse transmission line using tunnel diodes. The equation of propagation for this line is the same as that for a simplified model of nerve membrane treated elsewhere. This line shapes the signal waveform during transmission, that is, there being a specific pulse-like waveform peculiar to this line, smaller signals are amplified, larger ones are attenuated, narrower ones are widened and those which are wider are shrunk, all approaching the above-mentioned specific waveform. In addition, this line has a certain threshold value in respect to the signal height, and signals smaller than the threshold or noise are eliminated in the course of transmission. Because of the above-mentioned shaping action and the existence of a threshold, this line makes possible highly reliable pulse transmission, and will be useful for various kinds of information-processing systems.

Published in:

Proceedings of the IRE  (Volume:50 ,  Issue: 10 )

Date of Publication:

Oct. 1962

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