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  • Broadband SPICE -- New Tool for S-Parameter Simulation in Spectre RF

    Hi All, Here's another great new feature that I've found very helpful... Broadband SPICE is a new tool for S-parameter simulation in Spectre RF. In the MMSIM13.1.1 ( MMSIM13.1 USR1) release (now available on, a new interpolation method, bbspice , has been introduced...
    Posted to RF Design (Weblog) by Tawna on Thu, Apr 24 2014
  • Re: Insufficient memory to run PSS analysis - how to resolve?

    Hi apaj, This is a very quick reply, as I don't have time to delve into this.... You may want to contact Customer Support for additional assistance. If you are using s-parameters, use the harmonic balance engine, rather than the shooting Newton engine. HB is much better suited to simulate s-parameters...
    Posted to RF Design (Forum) by Tawna on Thu, Mar 6 2014
  • MMSIM 12.1 SpectreRF -- Preview of Coming nport Attractions! Part 2

    Greetings, MMSIM 12.1 contains many new features to aid RF designers. Many of these changes are described in my Part 1 blog post. I've saved my favorite for's a preview of the changes to the nport component in MMSIM12.1. 1. The Edit Object Properties/Add Instance form has been revised...
    Posted to RF Design (Weblog) by Tawna on Mon, Nov 19 2012
  • Nport Application Note has been Updated and Re-Released

    Happy New Year! After many requests, I set aside some time and updated the Using the nport in Spectre and SpectreRF Simulations appNote for MMSIM 11.1. You may download the appNote on Cadence Online Support . More nport enhancements are planned, so stay tuned! If you have any comments or questions, please...
    Posted to RF Design (Weblog) by Tawna on Tue, Jan 3 2012
  • My Favorite nport Settings for Spectre and SpectreRF

    The nport component located in analogLib can be used in circuits for Spectre and SpectreRF simulations. It is a scattering parameter (S-parameter) based distributed multi-port element. The nport truly is a "black box"… It can be used to model dramatically different systems, such as:...
    Posted to RF Design (Weblog) by Tawna on Wed, Mar 23 2011
  • Re: using nport in Verilog-AMS

    Hi Tobias, With regards to setting your path, you may want to look at the following Solution:;solutionNumber=11066876 Note that this is for the will be the same for the nport. In fact, you should use "nport" instead...
    Posted to Custom IC Design (Forum) by Tawna on Fri, May 28 2010
  • Re: using nport in Verilog-AMS

    I suspect it's the way you are defining the path in the file parameter. Try using a full path, rather than relative path. Also, it's good practice to designate your s-parameter files as mydevicesparam.s3p (or .s2p, .s4p, etc.). Not a big deal, but if you later want to plot those s-parameters...
    Posted to Custom IC Design (Forum) by Tawna on Thu, May 27 2010
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