FPGA-based optical interface 1+1 protection isolated multi-service Ethernet optical transceiver

Abstract

The invention discloses an FPGA-based optical interface 1+1 protection isolated multi-service Ethernet optical transceiver, comprising an optical signal transceiving circuit, a power supply circuit and a signal enhancement circuit, wherein the signal enhancement circuit comprises a first coil and a second coil, a capacitor C1 is coupled between a node at which the first coil and the second coil are connected and the ground, the secondary of an input transformer is also coupled with a common mode inductor, the arranged common mode inductor can suppress the outward radiation of electromagnetic waves during high-speed signal transmission from interfering with the signal transmission of adjacent equipment, the arranged capacitor C1 serves as a tap capacitor and is combined with the power supply circuit to provide a function of a DC bias voltage or a power source, the common mode current and common mode voltage on a cable can also be reduced by providing a low-impedance reflux path of common mode noises on a differential line, and thus the arranged enhancement circuit can not only enhance optical signals and extend the transmission distance, but also isolate the two ends of the input transformer and further prevent lightning strikes.

Description

technical field [0001] The invention relates to the field of communication circuits, and more specifically relates to an FPGA-based optical interface 1+1 protection isolation type multi-service Ethernet optical transceiver. Background technique [0002] In the past, the long-distance data communication in the field of industrial communication was directly communicated through cables. In order to achieve the transmission distance of tens to hundreds of kilometers, many repeaters need to be added to the transmission path, which greatly increases the construction cost. Cable communication has a large signal attenuation during data transmission and is easily interfered by external electromagnetic fields and electromagnetic waves. Therefore, the transmission distance is short, and the cost of communication cables is high and the confidentiality performance is poor. With the continuous development of the industrial field, optical fiber has become the main transmission medium in th...

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Problems solved by technology

[0004] However, after the switch receives the fiber optic signal, it needs to be transmitted to various company departments. The existing switch does not enhance the signal, so some departments far away from the switch will receive network signals worse, which may lead to data transmission during transmission. Lost or interrupted phenomenon, which makes it very inconvenient to use, if you need to add another switch, you need to increase the funds

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