Noise filter

Details Noise filter Noise filter

1989-04-19

1991-01-08

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333181, 333185, 361303, 361313, H03H 701, H03H 709

Patent

active

049839349

ABSTRACT:
A noise filter including a wound unit which is composed of two film sheets one of which is laid on the other. On one film sheet, two first conductors are formed, and a second conductor is formed on the other film sheet. Four terminals are fixed to the first conductors in such a manner that one pair of the terminals are fixed to one of the first conductors and the other pair of terminals are fixed to the other first conductors. By laying one of the film sheets on the other film sheet and winding the same together with the first and second conductors, each of the first conductors opposes the second conductor, whereby distributed capacitance (C1) is formed between each of the first conductors and the second conductor. The capacitance is connected in series between the first conductors via the second conductor. Cores are inserted in a hollow portion of the wound unit, whereby inductances (L1, L2) are formed by the first conductors, respectively.

REFERENCES:
patent: 1298396 (1919-03-01), Pruessman
patent: 2016303 (1935-10-01), Sprague
patent: 3093775 (1963-06-01), Lamphier
patent: 3483453 (1969-12-01), Meyers
patent: 4048593 (1977-09-01), Zillman
patent: 4586112 (1986-04-01), MacDougall
patent: 4945322 (1990-07-01), Okumura

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