Power supply apparatus for suppressing attenuation of a transmission signal
US7633774B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 2006 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Oct 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5454
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A power supply apparatus has a coupled transformer that inputs and outputs a communication signal and a capacitor that has high impedance to a commercial power supply frequency and low impedance to a communication signal frequency. The capacitor is connected between a primary winding of the coupled transformer and a power reception terminal. To both ends of the capacitor, a switching regulator is connected via a noise reduction circuit. To a secondary winding of the coupled transformer, a modem of a power line communication apparatus is connected. In the configuration, the coupled transformer and the switching regulator are thus connected in series.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.