The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 1992
Filed:
Jan. 03, 1990
W Richard Frederick, Mundelein, IL (US);
Integrated Power Components, Mundelein, IL (US);
Abstract
An integrated electromagnetic interference filter includes an inductor assembly for attenuating both common mode and differential mode electromagnetic interference conducted emissions from electronic equipment. The inductor assembly includes an outer core of permeable material defining an outer window, and an inner core of permeable material disposed in the outer window and defining an inner window. A first power lead for connecting the equipment to a source of electrical power includes a portion wound in one direction about only the outer core. The inductor assembly includes a second power lead for connecting the equipment to the source of electrical power with a portion of the second lead wound about both the inner and outer cores in the opposite direction to the winding of the portion of the first power lead. The outer core provides a magnetic path for the attenuation of common mode emissions and the inner core provides a magnetic path for the attenuation of differential mode noise. The filter can also include a multiple function capacitor including three capacitive elements.