Asymmetrical PCB Interconnect Tree Modelling with Coupling Effect

B. Ravelo (1) , F. Vurpillot (2) , A K Jastrzebski

1 Pôle Electronique et Systèmes
2 GPM - Groupe de physique des matériaux

The paper describes integrity analysis of the signal propagating on asymmetrical tree with coupling from neighboring lines. Theoretical principle illustrating the modelling methodology and the developed routine algorithm is mathematically established. The developed model was applied to 2:1 asymmetrical microstrip tree with neighboring single lines at 10-to-100µm distance. Frequency-and time-domain analyses were conducted to check the coupling influence onto the signal distribution tree due to the substrate dielectric dispersion using broadband model. Examples of applications from DC to 10GHz were investigated to evaluate the influence of the coupling on the asymmetrical tree responses. It was shown that ringing effects and distorted signals were occurring from the two tree branch outputs. Furthermore, time-domain analyses were performed with 8-bits high speed input signal data with 0.5 Gbps rate. It was found that the signal quality was degraded and the amplitude of the shared signals was slightly affected by the coupling. Index Terms-Behavioral model, asymmetrical tree, signal integrity, interconnect network, SIMO/SISO-transform.

Domaines: Electronique

B. Ravelo, F. Vurpillot, A K Jastrzebski. Asymmetrical PCB Interconnect Tree Modelling with Coupling Effect. EMC Europe 2014, Sep 2014, Gothenburg, Sweden. ⟨hal-02485771⟩