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 want to use the spectre recover option to extend simulation time. Here is an example of what I want to do.
Initial simulaiton stop time at 200us with savefile saved at this time point.
I then run a new simulation using my savefile in the recover option. I set the stop time at 400us.
When this simulation is done, I only see simulation results from 200us to 400us.
What I want to see is the simulation results from 0 to 400us. Is there a way to do this without explicitly knowing I need to do this before hand. What I mean is that I discover after running my 200us that I need to run 200us more. Of course I will have to have a savefile at 200us to do this. I just want to be able to append the two results so any skill/calc/plot functions operate correctly.
The first thing spectre does on a new simulation is delete the previous data run.
To keep the data, you need to copy 0 - 200u to a new directory. say input.raw200u
Then restart and run 200u - 400u. This data is saved in input.raw directory.
You then need to build a calculator expression merging the two:
v("out" ?result "tran-tran" ?resultsDir "./input.raw200u")+v("out" ?result "tran-tran" ?resultsDir "./input.raw")
In reply to EricCDN:
That makes sense. So I guess there is no way to get spectre to start from the point that it stopped so that in the end only one simulation results exists. If not the workaround should work.
In reply to MarkASummers:
Eric and I discussed this - adding the two waveforms will only work if the end point of the first and start point of the second are 0 - otherwise you get a DC offset caused by the extrapolation of the end points when you add two waveforms where the axis point ranges don't coincide.
See sourcelink solution number 11522792 - this gives code for a "concatenation" function.
Also, on the Direct Plot->Main Form, when using tran, there's an option to append to a previous result directory.