Patent ID: 7714682
Filing Date: 2010-05-11
Classification: H02M,H03H

Abstract:
1. A device for attenuating high frequency communication signals on a power line, comprising: a toroid shaped core formed of magnetically permeable material and having an inner surface to be disposed substantially around the entire circumference of the power line; a conductive winding encircling said core and traversing an aperture of said core; wherein said winding includes a first spiral coil comprised of a plurality of insulated loops; said core has a first end and said first coil is disposed adjacent said first end of said core; and wherein said first spiral coil is configured to act as an impedance to high frequency signals traversing said winding and to allow signals below one hundred hertz to traverse said winding substantially unimpeded to thereby prevent saturation of the core by power carried by the power line.