Device for preventing mixing of extrinsic noise and protector
US6809609B1 · kind B1 · utility
5Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Mar 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/38
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A two-staged coupling transformer comprised of an up-stream coupling transformer and a down-stream coupling transformer are successively provided between an input terminal and an output terminal, wherein respective primary windings are connected to the input side while secondary windings are connected to the output side. The up-stream coupling transformer and the down-stream coupling transformer are set to be of identical turns ratios and are connected by respectively converting each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.