Feed forward active EMI filters
US8823448B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2013 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Mar 29, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus for active feed forward electromagnetic interference (EMI) filtering, including, a noise detection circuit that receives EMI noise occurring at a noise source, and an active feed forward circuit operatively coupled to the noise detection circuit. The active feed forward circuit generates a noise canceling signal based on the EMI noise received by the noise detection circuit. The apparatus further includes a filter operatively coupled to the active feed forward circuit and the noise source, the filter adapted to receive the EMI noise occurring at the noise source and the noise canceling signal from active feed forward circuit, wherein the filter cancels the received EMI noise based on the received noise canceling signal to reduce EMI noise at a load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.