Semiconductor Engineering

Correct-By-Design Methodology Requires Carefully Defined Constraints

Since the dawn of PCB usage, constraints have been an important part of the design. What are the dimensions? What weight of copper? Now, constraints have become much more than just physical dimensions ...
EDN

Global approach to timing margins and constraint definition for SoC design, Part 2

Margins related to OCV have to be added to the above-described inducing jitter phenomena. It is important to remember that the first phenomena—margins related to OCV– are always impacting both hold ...
Simon Fraser University

Integrity Constraints

There are two categories of integrity constraints: General constraints, which allow you to restrict the data values that are accepted for the variables in a single data file, such as requiring that ...
Semiconductor Engineering

Making Declarative Modeling Modular: Portable Stimulus Introduces Dynamic Constraints

Naturally, Accellera’s Portable Stimulus Standard (PSS) supports the powerful capabilities of advanced verification techniques that are well-known in the industry today, including object-oriented ...
EDN

Global approach to timing margins and constraint definition for SoC design, Part 1

The dependence of yield in respect to design margin is depicted in Figure 1. Below a certain level, yield is destined to be 0, because physical phenomena that occur, and may only become evident after ...