Power supply cord with a noise filter

Details Power supply cord with a noise filter Power supply cord with a noise filter

1987-06-03

1988-10-11

Nussbaum, Marvin L.

Wave transmission lines and networks

Transmission line inductive or radiation interference...

174 32, 174 35R, 333181, 333185, H03H 701, H01R 1366

Patent

active

047774550

ABSTRACT:
A power supply cord having a noise filter is used for connecting an electronic apparatus to a power source, the noise filter being mounted on the cord within 30 cm from the end thereof connected to the electronic apparatus of the noise generating source. Such a power supply cord is used even with an electronic apparatus that does not have a noise filter so that a countermeasure for noise is easily provided without the especially troublesome application of wiring within a shielding case for the electronic apparatus. Since the noise filter is positioned within 30 cm from the end of the power supply cord to be connected to the noise generating source, the power supply cord does not act as a radiation antenna for the noise band from the noise generating source so that the power supply cord eliminates noise from both ends effectively and has a superior filter characteristic.

REFERENCES:
patent: 2186578 (1940-01-01), Doughman
patent: 4611185 (1986-09-01), Dirmeyer et al.
patent: 4614924 (1986-09-01), Kamitz et al.
Denes et al.--"Tiny Filters Block the Path of Radio Frequency Interference", Electronics, Oct. 31, 1966, pp. 58-67.

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