EMI filter circuit
US6898092B2 · kind B2 · utility
20Cited by
14References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Jun 25, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/15
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Techniques for reducing noise generated by a circuit include a common mode filter and a differential mode filter. The common mode filter includes an input for sensing a common mode signal between a power source and the circuit, an output, and active circuitry for producing an offset signal on the output. The differential mode filter includes an input, an output, and active circuitry for sensing a differential mode signal and producing variations in resistance between the input and output to offset the differential signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.