Project 3

SIwave is a specialized design platform for power integrity, signal integrity and EMI analysis of IC packages and PCBs. SIwave helps you model, simulate and validate high-speed channels and complete power delivery systems typical in modern high-performance electronics. It accurately extracts multi-gigabit SERDES and memory buses, providing product sign-off compliance for various designs. SIwave’s full wave extraction of complete power distribution networks (PDN) enables you to verify noise margins and ensure impedance profiles are met through automatic decoupling analysis in low voltage designs.

This example is based on a the analysis of electrothermal.

Expected Results

Ideally, the output signals should represent the input signals. To achieve

this, the signal path should be treated like a transmission line whose characteristic impedance is matched to that of the driver and the receiver. Since a via is located on the net, you can expect to see a discontinuity For the plane impedance, ideally, you would see the impedance of the power supply at the terminal where the IC is drawing current. If the imped ance is too high, an adequate voltage cannot be maintained on the IC at all times.

The implied assumption with the desired behavior is that there is no dis continuity in the signal return path, and, equivalently, that the potential variation between planes is small over the frequency range of interest. Whether this assumption is reasonable depends on the geometry of the РСВ.

To determine if the results agree with these expectations, you will examine the results in both the time domain and the frequency domain, and the impedance of the planes versus frequency. You will also examithe resonant modes of the planes to understand the observed behavior.

SIwave Reporter is launched. A graph showing the response for
the traces is generated.