EMI filter for controlling cutoff frequency
US7825750B2 · kind B2 · utility
5Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2007 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Nov 21, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/0107
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed relates to an electromagnetic interference (EMI) filter. Capacitance and resistance or inductance of an EMI filter, which includes a resistor and a capacitor or an inductor and a capacitor, can be controlled, such that a cutoff frequency can be freely controlled without manufacturing a separate EMI filter according to a characteristic of a desired cutoff frequency. Further, an intelligent EMI filter that can be applied to a surge protection device, which includes an ESD protection function as well as the EMI filter, is provided, such that a process can be simplified and costs can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.