Measuring and limiting EMI with a selectable mode reflection network
US4996488A · kind A · utility
6Cited by
2References
11Claims
0Family size
Inventor
Key dates
| Filing date | Sep 22, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Sep 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/0814
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Selectable mode rejection network (SMRN) for electromagnetic interference (EMI) excludes common mode (CM) and, alternatively, differential mode (DM) conducted emissions (CE) from entering power transmission lines from electrical equipment powered from such lines and producing such unwanted electrical noise. Phase-switching the SMRN determines whether CM or DM is so excluded, thereby facilitating measurement of the unexcluded type of CE. So used in measuring EMI, such SMRN enables improved filter design for the respective types of CE and composite filters for limiting both CM and DM CE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.