Filter circuits having transformers as filter elements

Details Filter circuits having transformers as filter elements Filter circuits having transformers as filter elements

1981-11-02

1983-10-11

Nussbaum, M.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333168, H03H 709, H03H 7075

Patent

active

044095694

ABSTRACT:
Filter circuits of the type having inductance and capacitance elements, wherein the number of magnetic components is reduced by using two transformers to perform the functions of four individual inductors. Each transformer has one end of the primary winding connected to one end of the secondary winding, and a pi or T equivalent circuit in which one of the inductance values is equal in magnitude and opposite in sign to a corresponding equivalent circuit inductance value of the other transformer.

REFERENCES:
Jordan et al, "Fundamentals of Radio", Prentice-Hall, New York, 1952; Title page and pp. 113-115.

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