Transmission circuit for Ethernet

Abstract

The invention discloses a transmission circuit for Ethernet. The transmission circuit comprises four sub-circuits, each sub-circuit is coupled between an Ethernet physical layer device and an Ethernet connection device, and is used for transmitting a pair of differential mode signals of the Ethernet. Each sub-circuit comprises a diode bridge, a first capacitor and a second capacitor. In each sub-circuit, a first input terminal and a second input terminal of the diode bridge are coupled to an Ethernet connection device. The first capacitor is coupled between the first input terminal and an Ethernet physical layer device. The second capacitor is coupled between the second input terminal and the Ethernet connection device. The transmission circuit also includes a third capacitor and a fourth capacitor. The third capacitor is coupled to the ground terminal and the anode output terminal of each diode bridge. The fourth capacitor is coupled to the ground terminal and the cathode output terminal of each diode bridge.

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 used for Ethernet (hereinafter referred to as "Ethernet transformers") include transformers with center taps, so they must be produced by manual winding, which results in poor adaptability to changes in production capacity, and production The cost is relatively high. 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). Effec...

AI Technical Summary

Problems solved by technology

[0002] Traditional network transformers used for Ethernet (hereinafter referred to as "Ethernet transformers") include transformers with center taps, so they must be produced by manual winding, which results in poor adaptability to changes in production capacity, and production relatively high cost

In addition, traditional Ethernet transformers do 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 with other loads in the same circuit). Effectively operates such that Ethernet service has to be interrupted

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