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.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
This course combines our Allegro PCB Editor Basic Techniques, followed by Allegro PCB Editor Intermediate Techniques.
Virtuoso Analog Design Environment Verifier 16.7
Learn learn to perform requirements-driven analog verification using the Virtuoso ADE Verifier tool.
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.
Hi,I am trying to run a tranisent noise with a model based op-amp to try to speed up the simulation time. I have a problem where despite the fact that I choose a particular resistor as not generating noise (setting "Generate Noise?" to No ) or choosing the resistor as not contributing to noise in the Noise Contribution list of transient noise, spectre still seems to account for the noise.
I can see this issue because if I set the resistor value to zero, there is no noise. But if I choose a very large value (10Gohms for example), I can clearly see the noise voltage being generated (again with Generate Noise clearly set to No AND/OR the resistor chosen as "off" in the Noise Contribution list).
It's surprising because when you simulate a single resistor you can either turn off the noise but this seems to be overriden when simulated in the circuit.
Any idea why spectre behaves like this?
I don't see this. For example, with this netlist:
//v1 (n1 0) vsource dc=0r1 (n1 n2) resistor r=10G isnoisy=yesr2 (n2 0) resistor r=5k isnoisy=notran tran noisefmax=1M stop=2u noiseoff=[r1]
Then n2 is a flat 0 if I either use noiseoff=[r1] or set r1 to isnoisy=no. If I leave it as isnoisy=yes and remove the noiseoff=[r1], I get noise at the output (and if I turn on the second resistor it's much noisier, of course).
So which MMSIM version are you using? (see the spectre subversion at the top of the output log, or type "spectre -W" in the UNIX terminal window).