M. Hampe, Sanaz Mortazavi, Alexander Stieler, K.-D. Tieste, L. Claus
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Analysis and Assessment of the Common Mode Termination for Automotive Ethernet 1000BASE-T1
In this work the currently proposed common mode termination (CMT) for 1000BASE-T1 is analyzed analytically. Especially the complex mixed mode scattering parameters of this circuit are calculated as a function of frequency. In addition, simulations and measurements are performed using a simple printed circuit board. All in all, the obtained results show a very good agreement. Based on this, an evaluation of the CMT is finally performed. It can be stated that the current circuit design reduces the common mode only to a very limited extent.