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The Darlington Problem

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1 Author(s)
Weinberg, Louis ; Hughes Research and Development Laboratories, Culver City, California

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Any RLC transfer function with an even or odd numerator is realized as the transfer voltage ratio of a Darlington network, where such a network is defined as one containing lossless elements plus only one resistance. The single resistance appears within the network, and the termination is thus lossless. An unbalanced network that contains no mutual inductance is achieved by the procedure. The method makes use of Norton's theorem, zero shifting, and the paralleling of ladder networks. The number of ladders and elements required in the realization is kept small by a technique demonstrated in the paper.

Published in:

Journal of Applied Physics  (Volume:24 ,  Issue: 6 )