Four-terminal network

Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters

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333175, 333185, H03H 709

Patent

active

044518048

ABSTRACT:
A four-terminal network, especially for filtering frequency bands or values, behaves as an ideal winding, therefore ensures high selectivity and, if equipped with an iron core, the possibility of carrying out switch operations. The network includes a pair of closely adjacent inductor coils having parallel turns for current in opposite directions, and equal inductance with a capacitor connected to at least one end of one of the coils.

REFERENCES:
patent: 1611932 (1926-12-01), Mathes
patent: 1613952 (1927-01-01), Johnson
patent: 3956717 (1976-05-01), Fisher et al.
patent: 4313222 (1982-01-01), Katthan
"The International Dictionary of Physics and Electronics", D. Van Nostrand, New York, 1961; p. 143.

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