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.
In previous releases, when you extract a net into SigXplorer, all the structures are automatically solved in Allegro PCB SI and then passed to SigXplorer. At times, the layerstack of the extracted structure might differ from the real layerstack in terms of the voids in a plane layer or shapes on the conducting layer. In such cases, the structure needs to be re-solved in SigXplorer. At other times, a field solution in SigXplorer takes a long time to run and often runs when not needed.The 16.6 release of Allegro PCB SI provides support for on-demand solving of models using Bem2D, Ems2D, and FSVia. However, unlike previous releases, now compulsory model solving during extraction from PCB SI is eliminated. The vias and trace models are unsolved when extracted from PCB SI and no impedance values are reported for trace models after extraction if no matched models are found in the existing working IML library.Read on for more details …
The autoSolve parameter, when set to On, automatically calls the field solver when you make changes in the parameters of a trace in the spreadsheet, for example. By default, the autoSolve parameter at the circuit level is set to Off. As a result, during extraction, no solving is triggered except for FSVia. FSVia models are always solved during extraction: For the commands which require a field solution, such as Simulate, Generate S-Parameters, and Transform to Constraint Manager, the default status of the autoSolve parameter is overridden and models are produced.
Models can only be solved using one of the following methods if the autoSolve parameter is set to Off by default -
The Manage Unsolved Parts command helps you manage all the unsolved parts including vias and traces. This command can be accessed through the Analyze menu or by right clicking in the SigXp canvas -
The command launches the Unsolved Part dialog which lists all the parts that have not been solved:
The Part Name column lists unsolved parts, while the Type column shows the type of the part, such as via or trace. The currently selected solver for vias and traces are also displayed. For example, in the figure above, FSvia will be used to solve the Vias, while Bem2D is used to solve the traces.
Note: All of the parts in the design appear in this dialog if there are no solved models associated with the extracted geometry found in the interconnect model library. If you run the Solver for one of the vias or traces, it is possible that the geometry matches one or more of the other elements. If so, the next time you launch this dialog, it may show fewer parts than expected.
Solving in Batch Mode
You can also solve traces and all vias using the Solve Batch command. Use this command to solve a single part in order to see the impedance, for example, or to create a model in the library with the current parameters. Right-click on an unsolved part and choose Solve Batch Mode (FSvia): Please feel free to share your feedback on this new PCB SI capability.Jerry “GenPart” Grzenia