Network devices with solid state transformer and class AB output stage for active EMI suppression and termination of open-drain transmit drivers of a physical device
US7964993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2007 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Oct 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments disclosed herein describe a network device including a class AB common mode suppression (CMS) circuit coupled in parallel between a line voltage source and a physical layer (PHY) device that provides active EMI suppression and Phy device termination. A network connector is coupled to provide the line voltage source to the class AB CMS circuit. The class AB CMS circuit provides current to the PHY device, terminates open-drain transmit drivers of the PHY device and suppresses common mode noise thereby minimizing electromagnetic interference. In other embodiments, the class AB CMS circuit is coupled in parallel between the network connector and a physical layer (PHY) device. The class AB CMS circuit suppresses common mode noise, and terminates open-drain transmit drivers of the PHY device, thereby minimizing electromagnetic interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.