![]() Figure 1 shows the transformation equations for converting a parallel circuit into a series circuit (see Appendix 1 for the derivation).įigure 1: These circuits are equivalent at one frequency. This tip is useful in simplifying transformer equivalent circuits or filter networks down to two terminal devices. It also shows that a graphical representation of this transformation as a function of frequency looks much like a Smith Chart ( Editor's note : the Smith Chart is a graphical technique developed in the 1920s for analysis of transmission lines, impedance matching, antennas and more, and still used extensively in RF-related design). This Power Tip shows you how to do a quick conversion of parallel-to-series complex impedances (and vice versa). ( Editor's Note: To see a linked list of all entries in this series, click here.)
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