Abstract
KALLMAN has described a bipolar negative resistance element using a few grains1,2 or thin layers2 of semiconductor material. Later2 he describes a technique using “plain iron wire”. The purpose of this communication is to emphasize the elegant simplicity of the latter method; it is found possible to demonstrate many of his results in less than 1 h, using only readily available materials.
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Kallman, H. E., Proc. I.R.E., 50, 2138 (1962).
Kallman, H. E., Proc. I.E.E.E., 51, No. 2, 396 (1963).
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BRABHAM, H. Kallman's Bipolar Negative Resistor. Nature 200, 253 (1963). https://doi.org/10.1038/200253a0
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DOI: https://doi.org/10.1038/200253a0
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