Cadence® system design and verification solutions, integrated under our System Development Suite, provide the simulation, acceleration, emulation, and management capabilities.
Verification 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.
I have a design with Momentum blocks incorporated inside (as 'mom' blocks). All Momentum blocks are simulated up to 300GHz.
However, when running harmonic balance simulation, I get an error: "Can not enforce causality of S parameter for assigned 'fmax' value is equal to or less than the maximal frequency in...." where the rest is the path to the mommdl/text.txt file of the momentum cell view.
The maximal frequency of the HB simulation (100GHz) is far lower than the upprer simulated Momentum frequency (300GHz).
Any ideas on how to solve the problem?
Customer Support Director - Analog/Mixed-Signal/RF AEs
Cadence Design Systems, Inc.
In reply to Tawna:
I am a newbie in the RF design area.
I do not use nport from analoglib, but rather simulate my layout in Momentun and then generate a schematic symbol from the Momentum tool. This block generated by Momentum has a 'mom' written inside.
When looking at the properties of this symbol, I can only see the maximal frequency, which is the maximal frequency I configured in Momentum.
How can I proceed debugging the problem?
In reply to JoshK:
I can help with Spectre debugging...but not Momentum (I've not used Momentum). Sorry! However, note that the error message you reported is a Spectre error message.
For Momentum issues, you may want to contact the Momentum support folks. (This is a Cadence Community forum.)
Watch out if you're using the symbol generated by the Momentum interface rather than using an analogLib nport and referencing the s parameter file. From what I've seen recently at customers, the Momentum-generated symbol sets the maximum frequency to be the maximum frequency in the s parameter file, but this defeats the causality correction in spectre. So on the instance, set the maximum frequency to 3 times the value it shows (ie 3 times the frequency you solved up to in Momentum). This is the default value for the underlying nport - unfortunately the momentum symbol doesn't work if you just blank out the max freq in the form.
I've let Agilent know about this (I think I did anyway; I'll check my email when I get into work)
Also, please use MMSIM12.1 to get the latest improvements in spectre's nport component (needed for simulating a parameters)
In reply to Andrew Beckett:
By the way, to find out more about the improvements in the nport component mentioned by Andrew, take a look at /blogs/rf/archive/2012/11/19/spectre-rf-mmsim-12-1-preview-of-coming-attractions.aspx.
When I look at the properties fo the Momentum generated block ("Edit Object Properties"), all parameters are greyed out, and the only filled parameter is "ImpMaxFreq", which is set to the frequency up to which I solved in Momentum. However, I cannot change its value.
How can I change the maximum frequency as you suggested?
Thank you for the help.
Sorry, I wasn't sure whether the field was editable - I'll explain how I fixed it when I saw this in person.
In the CIW, use Tools->CDF->Edit CDF, and set the CDF type to "Base". Then pick the lib/cell of the Momentum generated block, and then you'll see all the parameters for the cell, including ImpMaxFreq. Change this to 3 times the value, and OK the form.