Statistically speaking you probably care about On-chip Variation

Statistically speaking you probably care about On-chip Variation
by Tom Simon on 10-22-2019 at 10:00 am

There are some metaphorical similarities between reaching timing signoff and driving a car to your destination. Most of us get in the car, turn the key and push the gas pedal to make it go. While we might have a cursory understanding of what makes it go, there are actually a lot of “moving part” under the hood in each instance. For most… Read More


Webinar: OCV and Timing Closure Sign-off by Silvaco on Oct 10 at 10AM

Webinar: OCV and Timing Closure Sign-off by Silvaco on Oct 10 at 10AM
by Daniel Nenni on 10-01-2019 at 10:00 am

The old adage that goes the one constant thing you can always count on is change, could easily be reworded for semiconductor design to say the one constant thing you can count on is variation. This is doubly true. Not only is variation, in all its forms, a constant factor in design, additionally the methods of analyzing and dealing … Read More


How to Spice Up Your Library Characterization

How to Spice Up Your Library Characterization
by Tom Simon on 03-29-2019 at 5:00 am

It used to be that at the mention of libraries, people would think of foundry PDK deliverables. However, now a host of factors such as automotive thermal requirements, nanometer FinFET processes, near threshold voltages, higher clock rates, high volumes, etc., have dramatically changed library development. These factors … Read More


Machine Learning Accelerates Library Characterization by 50 Percent!

Machine Learning Accelerates Library Characterization by 50 Percent!
by Daniel Nenni on 04-06-2017 at 7:00 am

Standard cell, memory, and I/O library characterization is a necessary, but time-consuming, resource intensive, and error-prone process. With the added complexity of advanced and low power manufacturing processes, fast and accurate statistical and non-statistical characterization is challenging, creating the need … Read More


Variation Alphabet Soup

Variation Alphabet Soup
by Paul McLellan on 04-04-2015 at 1:00 pm

On-chip variation (OCV) is a major issue in timing signoff, especially at low voltages or in 20/16/14nm processes. For example, the graph below shows a 20nm inverter. At 0.6V the inverter has a delay of 2 (nominalized) units. But due to on-chip variation this might be as low as 1.5 units or as high as 3 units, which is a difference from… Read More