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Graphical Analysis of Tuned Coupled Circuits

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2 Author(s)
Harrison, A.E. ; University of Washington, Seattle, Wash. ; Mather, N.W.

A new basis for normalizing the transfer admittance of two coupled tuned circuits permits the representation of this admittance by a single universal curve which is a parabolic locus on the complex plane. Within the limitations of the assumptions of high Q and small frequency deviations, data can be obtained from this curve for different Q ratios, as well as the usual values of coupling and relative tuning. The method also simplifies the calculation of the input admittance of coupled circuits. Extension of the method to triple tuned circuits is possible, but the applicability of a single universal curve is lost.

Published in:

Proceedings of the IRE  (Volume:37 ,  Issue: 9 )