论文信息 - Comparison of voltage sources with current sources on unbalanced differential microstrip line

Comparison of voltage sources with current sources on unbalanced differential microstrip line

Now voltage sources are widely used for differential signaling. However, a common mode current is excited in unbalance differential transmission line. In this paper, common-mode excitation by differential current sources is compared with that by differential voltage sources in the unbalanced differential transmission line. A equivalent circuit describing the differential transmission line are used for evaluation of common mode current generated by the differential voltage or current sources. As a result, by using the current sources, the primary common mode current can be reduced by about 15 dB at 100 MHz than that of the voltage sources.

Osami Wada | Takashi Hisakado | Tohlu Matsushima | Hiroaki Saito

[1] Ruey-Beei Wu,et al. Reduction in Reflections and Ground Bounce for Signal Line Over Slotted Power Plane Using Differential Coupled Microstrip Lines , 2009, IEEE Transactions on Advanced Packaging.

[2] Tetsushi Watanabe,et al. Calculation of Common-Mode Radiation from Single-Channel Differential Signaling System Using Imbalance Difference Model , 2010, IEICE Trans. Commun..

[3] Tetsushi Watanabe,et al. A Prediction Method of Common-Mode Excitation on a Printed Circuit Board Having a Signal Trace near the Ground Edge , 2004 .

[4] Melinda Piket-May,et al. The impact of a nonideal return path on differential signal integrity , 2002 .

[5] Y. Kayano,et al. Identifying EM radiation from asymmetrical differential-paired lines with equi-distance routing , 2012, 2012 IEEE International Symposium on Electromagnetic Compatibility.