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Physical interface board of high speed 1553B optical fiber bus

An optical fiber bus and physical interface technology, applied in optical fiber transmission, electromagnetic wave transmission systems, electrical components, etc., can solve the problems of difficult high-frequency signal sampling, low efficiency of short frame data, etc., and achieve the effect of preventing signal interference.

Active Publication Date: 2011-04-27
BEIHANG UNIV YUNNAN INNOVATION INST
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Problems solved by technology

[0006] The above two technologies have their own shortcomings. For the "oversampling" technology, it is difficult to sample high-frequency signals on the FPGA; for the "clock data recovery" technology, it is only suitable for The transmission of long frame data, and its efficiency is very low for short frame data

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  • Physical interface board of high speed 1553B optical fiber bus
  • Physical interface board of high speed 1553B optical fiber bus
  • Physical interface board of high speed 1553B optical fiber bus

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Embodiment Construction

[0020] The structure of the high-speed 1553B fiber optic bus physical interface board mainly includes fiber optic transceivers, FPGA logic devices, double-row pins and other supporting components. Its system structure is as follows: figure 1 shown. In the specific implementation process, interface circuit design and FPGA logic design are the two most important design links, which will be explained separately below.

[0021] (1) Interface circuit part

[0022] The interface circuit part mainly realizes the correct conversion from the LVPECL level of the fiber optic transceiver to the LVTTL level of the FPGA. The key issue involved is the matching of the source end of the fiber optic transceiver and the terminal resistance.

[0023] According to the LVPECL standard, the impedance of the source device of the differential signal and the impedance of the terminal device must strictly meet specific requirements, otherwise the signal in transmission will ring or surround oscillation...

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Abstract

The invention relates to a novel physical (PHY) interface board of an optical fiber bus. The interface board comprises an interface circuit part and a coding / decoding logic design part, wherein the coding / decoding logic part comprises a serial data coding / decoding module, a data caching and converting module and a user interface input / output module. The physical interface board is mainly applied to computer bus systems in the fields of aerospace and industrial control, improves the transmission speed of the conventional 1553B bus from 1Mbps to 200Mbps, and can provide an optical fiber communication interface to meet the requirements on optical fiber transmission.

Description

technical field [0001] The invention relates to a physical interface (PHY) board of a novel optical fiber bus. This interface board is mainly used in computer bus systems in aerospace and industrial control fields. It realizes the correct transmission and reception of Manchester II encoded high-speed data, supports a maximum data transmission rate of 200Mbps, and supports optical fiber communication. Background technique [0002] Manchester encoding is a data encoding technology with its own synchronous clock, which can be subdivided into two categories: the first type is mainly used for 10M Ethernet, which uses a jump from low to high to represent "1", and from high to high A low transition means "0"; the second type is often used in the MIL-STD-1553B bus standard, which uses a low-to-high transition to represent "0", and a high-to-low transition to represent "1". This encoding is also called "Manchester II encoding" (referred to as Manchester II encoding). [0003] Mann ...

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Application Information

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IPC IPC(8): H04B10/12H04B10/00H04B10/25
Inventor 胡凯姜宏丁毅田俊玲张慧颖
Owner BEIHANG UNIV YUNNAN INNOVATION INST
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