NETWORK DEVICES WITH SOLID STATE TRANSFORMER THAT PROVIDES TERMINATION OF OPEN-DRAIN TRANSMIT DRIVERS OF A PHYSICAL LAYER MODULE

摘要

Embodiments disclosed herein provide a network device including an electronic load circuit coupled in parallel between a non-magnetic transformer and a physical layer (PHY) module. Data signals are received via a network connector, and the electronic load circuit is operable to provide DC termination of open-drain (DC common-mode control and current souring to) transmit drivers of a physical (PHY) layer module. A common-mode suppression (CNS) circuit can be coupled to positive and negative input signals to the PHY layer module. The CNS circuit is operable to block common-mode noise currents while passing differential mode data signal currents bi-directionally between the network connector and the PHY layer module. Further embodiments disclosed herein describe a network device including a class AB common mode suppression (CNS) circuit coupled in parallel between a line voltage source and a physical layer (PHY) device that provides active EMIR suppression and Phy device termination. A network connector is coupled to provide the line voltage source to the class AB CNS circuit. The class AB CNS 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 CNS circuit is coupled in parallel between the network connector and a physical layer (PHY) device. The class AB CNS circuit suppresses common mode noise, and terminates open-drain transmit drivers of the PHY device, thereby minimizing electromagnetic interference.