Transmission circuit for Ethernet

Abstract

The invention discloses a transmission circuit for Ethernet. The transmission circuit comprises four transmission sub-circuits, each transmission sub-circuit is coupled between Ethernet physical layer equipment and Ethernet connection equipment, comprises a first coil, a second coil, a first magnetic core and a transformer, and is used for transmitting a pair of Ethernet differential mode signals. A second connection point of the first coil and a third connection point of the second coil are both coupled to an Ethernet connection device. A first connection point of the first coil and a fourth connection point of the second coil are both coupled to a ground terminal. The first coil and the second coil jointly wind the first magnetic core in the same direction. The transformer includes a third coil and a fourth coil. A fifth connection point and a sixth connection point of the third coil are respectively coupled to the second connection point and the third connection point, and two ends of the fourth coil are coupled to Ethernet physical layer equipment.

Description

technical field [0001] The invention relates to a transmission circuit for Ethernet. More specifically, the Ethernet transmission circuit of the present invention can replace a traditional Ethernet transformer, and provide functions of signal coupling, DC isolation and surge protection for Ethernet transmission. Background technique [0002] Traditional network transformers for Ethernet (hereinafter referred to as "Ethernet transformers") include transformers with center taps, so they must be produced by manual winding, which makes traditional Ethernet transformers less adaptable to changes in production capacity. Poor and relatively expensive to produce. In addition, the traditional Ethernet transformer does not have the function of surge protection, which makes the Ethernet system often unable to operate in environments that are susceptible to surge interference (such as lightning strikes, static electricity, or switching actions of power supplies of other loads in the sa...

AI Technical Summary

Problems solved by technology

[0002] Traditional network transformers for Ethernet (hereinafter referred to as "Ethernet transformers") include transformers with center taps, so they must be produced by manual winding, which makes traditional Ethernet transformers less adaptable to changes in production capacity. Poor and relatively expensive to produce

In addition, the traditional Ethernet transformer does not have the function of surge protection, which makes the Ethernet system often unable to operate in environments that are susceptible to surge interference (such as lightning strikes, static electricity, or switching actions of power supplies of other loads in the same circuit). Effectively operates such that Ethernet service has to be interrupted

Images