Abstract
CONVENTIONAL low-frequency delay lines, built from capacitors and iron-cored inductors, show both linear and non-linear distortion. The linear distortion gives rise to dispersion, since the time delay depends on frequency. It is only possible to realize a time delay that is approximately constant over a limited frequency range1–3. The non-linear distortion is due to the iron-cored inductors. Only for signals that are sufficiently small is this distortion negligible. So the iron limits the allowable energy-level.
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JANSSEN, J. Discontinuous Low-frequency Delay Line with Continuously Variable Delay. Nature 169, 148–149 (1952). https://doi.org/10.1038/169148a0
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DOI: https://doi.org/10.1038/169148a0
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