Noise filter

Details Noise filter Noise filter

1989-03-23

1990-07-31

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

049453220

ABSTRACT:
A noise filter includes a wound unit that is composed of two film sheets, one of which is laid on another. On the film sheets, conductors are respectively formed, to which terminals are fixed, respectively. By laying one of the film sheets on another film sheet and winding the same together with the conductors, the conductors on the respective film sheets oppose each other via the film sheet, whereby distributed capacitance is formed between the conductors. Cores are inserted in a hollow portion of the wound unit, whereby inductances are respectively formed by the respective conductors and the cores. The inductances connected between the terminals at an input side and the terminals at an output side, respectively. The above-described distributed capacitance is connected between the conductors that include the inductances.

REFERENCES:
patent: 2016303 (1935-10-01), Sprague
patent: 2884605 (1959-04-01), Dubilier
patent: 4048593 (1977-09-01), Zillman
patent: 4298848 (1981-11-01), Kurose
patent: 4563658 (1986-01-01), Ikeda
patent: 4751479 (1988-06-01), Parr
patent: 4847575 (1989-07-01), Ikeda

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