Design and measurements of optical modul for automotive LIN bus system

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Dr. Gerhátné Udvary Eszter
Department of Broadband Infocommunications and Electromagnetic Theory

It is common today that complex and compact integrated circuits are found and used together with popular and widespread wireless communication devices. It is essential that both device technologies must function and perform reliably in the presence of the other's electromagnetic field.

In the automotive industry the analysis of electromagnetic compatibility is very important as today's vehicles are equipped with electronic devices which provide safety and comfort. By installing these components in a vehicle, a closed system is created, so it is essential to prevent harmful emissions of these devices and have the technology to shield their effects.

In my thesis I have designed an OptoLIN module for LIN bus systems used primarily in the automotive industry. After the physical realisation of the module I have run some functional tests and analyzed the module's fail points. Then I corrected these issues and errors and I ran some tests about conducted and radiated emissions and made immunity measurements according to ISO10605, ISO11452 and CISPR-25 international standards. At the end I compared the results to the test results made by a professional OptoLIN device and I validated my circuit.


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