DesignCon 2022 Schedule Builder

This paper presents a parametric ADC-based SerDes system modeling framework intended to support all project phases: from architectural definition, through analog and digital design, to validation.

Modeling techniques that enable a single model to support a wide range of system modeling activities are introduced. The parametrization of key design variables allows for the evaluation of architectural options to generate block level specifications. Object oriented modeling is used to decouple block interfaces from the evolving block implementation, thereby maintaining a simulation-ready top-level model. The block-level models support automated export to SystemVerlilog thereby facilitating mixed-signal design validation.

A correlation example is described to illustrate how the proposed modeling framework can be configured to reflect the IBIS-AMI model of a 112Gb/s ADC-based SerDes product.

In addition to being a valuable tool during SerDes development, these models can be delivered to system integrators enabling the incorporation of accurate models that capture the details of a real-life ADC-based SerDes right from the feasibility study phase. These models allow system integrators better observability and flexibility in performing end-to-end link analysis: including simulation of co-packaged and opto-electrical systems, and exploring interaction between SerDes and FEC. The underlying implementation can be obfuscated at different hierarchy levels for IP protection.

Takeaway

A unified system modeling framework is presented. Participants will gain knowledge that with a little bit of up-front effort, system modeling can be structured such that a single model can span the SerDes development cycle from conception to validation. This eliminates the potential for model divergence or the overhead of correlation, which is typical when multiple single-use models are used.