Cadence® system design and verification solutions, integrated under our System Development Suite, provide the simulation, acceleration, emulation, and management capabilities.
System Development Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technlogy. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
Get email delivery of the Cadence blog featured here
Fast/slow, high/low, pre/post. If I have to spend the time to run all the possible combinations, I won't have much time left to tune my design. But how do I really know which combinations are going to be the worst case for each of my specifications?
This is exactly the problem addressed with the Worst-Case Corners (WCC) run mode in the Virtuoso Analog Design Environment GXL (ADE GXL).
The approach is straightforward, the setup is simple, and the results are powerful.
The Approach-Framing the Problem
Worst-Case Corners follows a basic Design of Experiments (DoE) methodology. That is, given a set of input variables (your corner parameters and their values), and a set of measured output responses (your testbench measurements), a number of trial sets of input values are intelligently chosen and simulated. The results are observed and analyzed and then one corner is created for each specification containing the combination of variable values which has been determined to give the "worst" result. (Two worst corners are created for range and tolerance type specs.)
In general, process corners are given special treatment during trial creation, since there is inherently no natural sequence to the list of model sections. Thus, all process corners are considered in simulation.
The Setup-What Goes In?
WCC works with your existing ADE XL testbenches, measurements and specifications. You can use the corners you already have defined in ADE XL as input for the WCC setup, or you can specify any combination of variable values to be considered.
Several methods are provided to trial experiment selection and corner creation. You choose the method based on the linearity of your circuit response and inter-relationships of your input variables. Standard DoE and response surface methods (RSM), such as one-factor-at-a-time (OFAT), Central Composite and Factorial, are supported to give a full spectrum of analysis capabilities and performance.
The number of simulations required to determine the worst-case corners depends on the number of variables and the number of values for each variable. Typically, on the order of 30-50 simulations are run for most common corner setups.
The Results-What Comes Out?
At the conclusion of a run, worst-case corners are created for each specification in your ADE XL setup. Depending on the method used, the created corners will be simulated and validated against the models used to identify the worst-case variable values.
In addition, the results of the simulations are analyzed for sensitivity and displayed in an interactive table, allowing you to further examine the characteristics of your circuit's responses to each variable as well as how each factor contributes to the overall variation in circuit performance.
Now that you have created the worst-case corners for your design, you are well-positioned to efficiently optimize your design, either manually using ADE XL, or by taking advantage of advanced ADE GXL analyses such as Sensitivity Analysis and Circuit Optimization.