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of the complex frequency variable s. That is, the impedance is the ratio of two polynomials in s.

There are three broad areas of study in network synthesis; approximating a requirement with a rational function, synthesising that function into a network, and determining equivalents of the synthesised network.

Approximation

The idealised prescribed function will rarely be capable of being exactly described by polynomials. It is therefore not possible to synthesise a network

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