A Design Method of Coding Circuit for Optical Fiber Transmission

Abstract

The invention discloses a coding circuit design method applied to optical fiber transmission. The method comprises coding processes and decoding processes: a coding process for collecting collection data in an FPGA and a decoding process for a control command, and a decoding process for controlling the collection data arranged in the FPGA and a coding process for the control command. According tothe method provided by the invention, the mode of combination of a synchronous head and a complete balanced code is used; the synchronous head and a transmission protocol are self-defined; a coder, decoder, a parallel-serial conversion circuit and a serial-parallel conversion circuit are designed, and thus bidirectional transmission of the high-voltage collection data and the low-voltage control command can be achieved through only connecting an external optical fiber transceiver; a hardware circuit is simple to design, and can completely replace a special chip and meet high voltage isolationtransmission requirements, and real-time uploading of the high-voltage end collection data and downloading of the low-voltage end control command are achieved.

Description

technical field [0001] The invention relates to the field of optical fiber transmission, in particular to a coding circuit design method for optical fiber transmission. Background technique [0002] In the fields of high-voltage generation and testing such as power systems and program-controlled power systems, in order to ensure safety and reduce signal interference, and realize the isolation of low-voltage control and high-voltage output, optical fiber is usually used for isolated transmission. Optical fiber transmission has the characteristics of fast speed and high safety. Optical fiber transmission usually uses the standard 8B / 10B protocol for transmission. The design of this protocol is complex, and the balance problem needs to be considered. The cost of the dedicated chip is high and the volume is large. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a coding circuit design method for optical fiber transmi...

AI Technical Summary

Problems solved by technology

[0002] In the fields of high-voltage generation and testing such as power systems and program-controlled power systems, in order to ensure safety and reduce signal interference, and realize the isolation of low-voltage control and high-voltage output, optical fiber is usually used for isolated transmission. Optical fiber transmission has the characteristics of fast speed and high safety. Optical fiber transmission usually uses the standard 8B / 10B protocol for transmission. The design of this protocol is complex, and the balance problem needs to be considered. The cost of the dedicated chip is high and the volume is large.

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