Dual Link DVI-Optical Extender Design

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Dr. Ruszinkó Miklós
Department of Electronics Technology

Digital signal transmission is today’s most advanced mechanism for uncompressed video stream transmission, used in many parts of the world, found in home media players, up to the professional studios. History of the high-bandwidth image transfer interfaces in less than two decades have evolved considerably, through the DVI interface was a pioneer. It is now used in many areas because of its simplicity, robustness and flexibility. Dual Link DVI interface for signal transmission, in addition to high bandwidth, plays a significant role in 3D projection, which is becoming more and more popular nowadays.

In my dissertation, I present the functional mechanism and the design flow of a device, capable of transmitting Dual Link DVI video signal on multimode fiber cables, fitting into the product range of Lightware Ltd. In the first chapter, the necessary theoretical background is presented, focusing on DVI and USB standards and optical signal transmission. The second chapter will introduce the design methodology, the device specifications and the main characteristics of the components used to carry out the given task.

The demonstration of the design phase of the two devices contains the presentation of the block diagrams, the accurate description of the operation and the explanation of the functioning of the special analog circuitry. In the PCB design phase, I illustrate the main aspects of the printed wiring board design. I briefly present the outcomes and errors of the assembly and the first power-up, and then I present the results of the functional tests.


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