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Signal Integrity Analysis with Power Delivery Network
Abstract
Increased frequencies and reduced rise times have made signal integrity simulations an integral part of high speed board designs. Signal integrity simulations are usually performed considering an ideal power source and power integrity simulations are performed assuming ideal transmission lines. But due to ever decreasing rise times errors creep into signal quality and timing analysis by ignoring the effects of the PDN. This paper outlines the necessity and the impact of including power delivery network effects for signal quality and timing analysis. This paper highlights the combined effort of signal integrity and power delivery simulations which are performed to obtain the optimal topology, terminations and decoupling solution for motherboard implementation of 533MT/s DDR2 devices that are soldered directly on the motherboard
... The Icc(t) approac estimation on the voltage drop if su be fulfilled [4]. This paper focuses on improvi delivery analysis methodology th modeling assumptions starting fr model and towards the platform in limitations of Icc(t) based method simulation and validation results t simulation approach [5] [6] are als The impact of the power delivery signaling perfomance is further di future design references. ...
The conventional power delivery analysis applying Icc(t) approach has the propensity to yield pessimistic outcome that leads to power delivery network (PDN) over-design. In addition, the noise profile captured using Icc(t) approach has high prospect of miscorrelation with the lab measurement data. Recent works adopting the signal integrity and power delivery (SIPD) co-simulation approach was found fruitful to produce better results compare to the conventional Icc(t) approach. However, the SIPD co-simulation approach is still unable to address the miscorrelation between the simulation and validation results based on time domain analysis. In this paper, the limitations of the Icc(t) based methodology and several important simulation assumptions that are critical to further improve the simulation accuracy are discussed. Key parameters that pose significant impacts to power delivery noise behavior are characterized through this evaluation. The impact of the power delivery noise to overall signaling perfomance is also discussed in this paper for future design references.
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