DC25_PAPER_TRACK01_UsingResponseSurfaceMethodology_Neally_v2.pdf

1、 Using Response Surface Methodology to Overcome Incumbent Inertia:A T-coil Case Study Scotty Neally,AMD,Inc.Scotty.N David Kopp,AMD,Inc.David.K Garth Sundberg,Ansys,Inc.Garth.S Abstract The most common layout optimization technique is to iterate upon frequency domain performance until a criterion is

2、 met.We believe this results in either a sub-optimal or over-constrained solution due to a few critical interactions.Frequency domain metrics do not comprehend risetime degradation and neglect system-level equalization,while iteration can exclude viable solution space as the design progression intro

3、duces new boundary conditions.Early electrical decisions like pin assignment,circuit topology,and stackup ordering have an outsized influence on the signal and power integrity.By down-selecting,subject matter experts choose to reduce the design space in favor of computational expediency,but this may

4、 unintentionally bias the solution space for later milestones.Unfortunately,as the design matures,teams often lack time or resources to revisit these early decisions which now limit the design.In this paper,we call this tendency incumbent inertia:the hesitancy to deviate from an established norm due

5、 to sunk costs.Our case study will consider a fixed area coil that aims to maximize eye size at 12Gbps for channels in both read and write directions while considering ESD loading at a single termination value.Previously,this process would require significant time and resources to complete,but it ca

6、n now be expedited using AI-aware tools to explore unique and previously unconsidered design corners with little overhead compared to traditional methods.Author Biographies Scotty Neally received a B.S.E.E from California Polytechnic University,San Luis Obispo.He is an accomplished signal integrity