editor's blog
Subscribe Now

Sophisticated Variation Modeling

As a newly-developed process is prepared for delivery into the production world, one of the last things that has to happen to effect a transition is the development of compact models for use in design simulation. And, of course, these days, such a model must account for process variations, which means covering the wide range of corners that a process can have to capture the statistics.

We’ve seen some of this before with Solido, but according to newcomer GSS, whom my colleague Dick Selwood explored at some length back when GSS was getting started, most other tools model processes as Gaussian, and the world isn’t actually Gaussian. Also, the existing tools help with simulation, but they don’t create a model.

Well, GSS has now released their tool. It works as a “wrapper” to a simulator, as these tools are wont to do. So it doesn’t do the actual simulation; you pick whatever simulator you want to work with, along with the circuit and model strategy, and the GSS tool creates the corners to be run – on the order of a couple thousand runs. Because of the independence of the runs, this scales perfectly with additional processors; you specify the number of processors and it handles the load management.

It then builds a model with statistical features that no other models have; the model itself has time-dependent capabilities for characteristics that evolve over time. In this manner, they say that it bridges TCAD and production EDA in a way that no other tool does.

They announced their tool in a somewhat indirect fashion, focusing on the possibility of unforeseen SRAM yield issues at the 20-nm node. You can see more about the details of that discussion in their release.

Leave a Reply

featured blogs
Jan 17, 2020
I once met Steve Wozniak, or he once met me (it's hard to remember the nitty-gritty details)....
Jan 17, 2020
[From the last episode: We saw how virtual memory helps resolve the differences between where a compiler thinks things will go in memory and the real memories in a real system.] We'€™ve talked a lot about memory '€“ different kinds of memory, cache memory, heap memory, vi...
Jan 16, 2020
While Samtec started as a connector company with a focus on two-piece, pin-and-socket board stacking systems, High-Speed Board Stacking connectors and High-Speed Cable Assemblies now make up a significant portion of our sales. To support development in this area, in December ...
Jan 16, 2020
Betting on Hydrogen-Powered Cars On-demand DRC within P&R cuts closure time in half for MaxLinear Functional Safety Verification For AV SoC Designs Accelerated With Advanced Tools Automating the pain out of clock domain crossing verification Mentor unpacks LVS and LVL iss...

Featured Video

Automotive Trends Driving New SoC Architectures -- Synopsys

Sponsored by Synopsys

Today’s automotive trends are driving new design requirements for automotive SoCs targeting ADAS, gateways, connected cars and infotainment. Find out why it is essential to use pre-designed, pre-verified, reusable automotive-optimized IP to meet such new requirements and accelerate design time.

Click here for more information about DesignWare IP for Automotive