High-speed digital optical fiber isolation transmission device and method

Abstract

The invention discloses a high-speed digital optical fiber isolation transmission device and method, and belongs to the field of high-speed digital isolation transmission control. A digital technologyand an optical fiber transmission technology are combined, so that the data transmission performance is excellent; an optical fiber is used for transmission, the device and the method have the advantages of high isolation voltage level, high anti-jamming capability, large input dynamic range, high response speed and the like, and high-speed and high-precision signal transmission can be realized in the high-voltage and strong-electromagnetic interference environment; a high-speed digital serial communication SERDES technology is adopted, low-speed parallel signals are converted into high-speedserial signals, and point-to-point double-wire data transmission is achieved, so that the transmission capacity and the system performance can be improved, and the communication cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of high-speed digital isolation transmission control, and in particular relates to a high-speed digital optical fiber isolation transmission device and method. Background technique [0002] In the high-performance program-controlled high-voltage DC power supply and high-voltage source-measurement unit, in order to better suppress noise interference and improve the electromagnetic compatibility of the system, strict electrical isolation between the input circuit and the output circuit is required. At the same time, the signals on the input and output sides participate in the loop control, and good real-time communication must be carried out to obtain stable closed-loop adjustment performance of the power loop. Especially in the high-voltage source-measurement unit, since the output voltage is DC high voltage, the current detection, gear control and protection control signals on the output side are relatively weak (the ...

AI Technical Summary

Problems solved by technology

Traditional signal isolation and transmission often use optocoupler isolation and magnetic isolation, both of which have their own shortcomings

There is no direct electrical connection between the input and output of the optocoupler device, and it has a certain isolation effect. However, due to its inherent current transmission characteristics, its linearity and accuracy are poor when used for analog signal transmission. It is used for digital signal transmission. The time response speed is slow, and high-speed and precise isolated transmission cannot be realized; the magnetic isolation circuit can only transmit AC signals, the transmission rate is low, and the anti-interference performance is poor, and high-speed real-time isolated transmission cannot be realized

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