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.
Hello all,I tried to model on-chip spiral inductors according to the SpectreRF User Guide. To this end, I wrote the process file according to my process data (AMS 035 HV), inserted the inductor symbol from the passiveLib and specified the geometrical data in the CDS window. For some reason, the parameter extraction that is performed prior to simulation only works for a rectangular shaped inductor (and not for octagonal and circular shapes). The error message in the log file looks as follows:Internal err: dist_bet_pt_and_fil: why is t = 1?Also, the inductance values that are extracted for the rectangular case are not conform with those calculated by other tools/formulae (Wheeler, performing integration in MATLAB, Mohan equation from Tom Lee's book) but differ by a factor of 15.Thanks in advance for any advice.Best regards,Jens
It sounds as if you may be using the obsolete (and end-of-lifed) old passive component modelling tool which was rather basic.In MMSIM61 (best to use a recent ISR, since it is being enhanced all the time) there is a tool Virtuoso Passive Component Modeller (it needs two MMSIM tokens), which is a inductor/transformer/transmission line synthesis tool and EM solver for analysing inductors etc, and this is far, far superior to the previous very basic solution.This will generate pcells, symbols, s-parameter files and lumped models for your technology, and will synthesize an inductor given a target L, Q, SRF, and so on.Regards,Andrew.
Thanks a lot Andrew,I changed to the VPCM tool and it works fine. The only problem I had was to generate the right s-parameter file for circular shaped coils. In the header of the BSimProplus RF data file you have to manually add geometrical information, including the shape. Unfortunately, I could not find the right coding (number) for circular shape. Could anybody help me on that issue?
Apologies for the delay - been a bit busy recently...Not quite sure I understand. Are you synthesizing a circular inductor? What exactly are you having to edit, and at which point?Regards,Andrew.
Thanks a lot for your efforts and sorry for giving a rather fuzzy description of my problem!So here's a second try:In the "preparing input data files" for the model trainer section of the VPCM user guide it is said that one has to add the geometry information of the coil to the BsimProPlus RF file containing the s-parameter data obtained from EM-simulations. There, apart from the width, the spacing, etc. one also has to specify the shape of the inductor. Unfortunately, the VPCM user guide does not say how you specify a circular spiral inductor 8 stands for octagon and I found by trial and error that 4 stands for rectangular, but I have no idea which number denotes a circular one.I hope that was more precise then last time,Jens