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.
I would like to get some advice from experienced users (professionals or regulars) in PCB Design flow, especially in complex PCB boards.
I already made PCBs, following the "basic" design flow as shown in this picture :
But now I'm starting to make larger PCBs which are more complex, and I have some questions in the PCB Design step (red rectangle of the previous picture), especially in the "Trace Routing".
For example, I draw the schematics of a complex board and do the simulations, then I design the Layout to finally have something like this :
And I wonder to know the "Correct Flow" to design the layout correctly :
After placing the components, should I start with routing the "signals nets", and then routing the "Power nets VCC_5V, VCC_3.3V, ...", and finally do a ground plane with all GNDs ?
Or is it necessary to route all the nets at the same time, hoping having something correct ?
Thanks for your help !
Hello, The biggest challenge most PCB designers face on larger boards that contain many nets is laying out the board so there is minimal crossing of ratsnest. I have designed many boards both large and small and typically placment of components to minimize crossing nets is about 60% of the work load.
The actual routing is the easy part really. It is kind of like joing the dots in an old game. The routing of any net can go very smooth if the placement is done well.
For power and ground nets you have to consider a little more. Looking at your design you should consider how many layers the board will span. If it is a 4 layer board you could use the inner layers for power planes or trace routing too so in general the routing of power and grounds on larger boards comes down to how many layers the design will need to route all the traces.
On a multi layer design with inner planes available most designers will fan out component leads for power and grounds and then seed a suitable via to the planes. When all the power and grounds are routed in normal routing of the signal nets would be the next step.
There is not really a right and wrong way to go about it, Key thing would be to look at the placement and see what will work best.
Main things to consider in advance are.
Component CountPhysical Board SizeLayer CountPlacement of PartsRoutingManufacture
Hope this helps