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Spectre

  • 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
  • fully differential opamp .. how to calculate cmrr ??

    I made this schematic and I simulated this I am getting gain ~40dB and UGB 20Mhz, I want to do stability analysis for this fully differential ckt , And I want to find out --- CMRR --- PSRR ---Loop gain (from stability analysis ) How I should use cmdprobe to do stb analysis , please help me ,, adrew sir...
    Posted to RF Design (Forum) by rakesh reddy on Mon, Feb 17 2014
  • Re: cdma_2ms_data

    How the files are generated are briefly discussed here (http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=/spectreRFTheory/spectreRFTheory13.1/chap2.html ) The files are listed as cdma_2ms_idata and cdma_2ms_qdata . The stored signals were created with the CDMA signal...
    Posted to Custom IC Design (Forum) by Tawna on Tue, Jan 28 2014
  • Re: pss insufficient memory problem

    Hi, 1. Yes, MMSIM10.1 and 12.1.X are a lot different. Better yet, go to 13.1. 2. That is not what I was asking for. In the netlist, there is a "save" statement. It will tell how many nodes and nets are saved. If you "save all" (for example), that can cause issues. Saving only selected...
    Posted to RF Design (Forum) by Tawna on Fri, Jan 24 2014
  • Re: pss insufficient memory problem

    For questions like this, it is better to file a Case with Customer Support . Your versions of spectre are very old. You should be using MMSIM 12.1.1 or better yet MMSIM 13.1 . You didn't mention how many nets/nodes that you were saving. Only save the most important ones. It is helpful to see the...
    Posted to RF Design (Forum) by Tawna on Fri, Jan 24 2014
  • Pspice model errors in Virtuoso

    Hi Guys I am trying to simulate MAX9643U and EL7202 (using their Pspice models) as a part of my design, in Virtuoso. While I have reviewed many similar problems and solutions in this informative website, I still can not overcome the errors. 1) MAX9643U (the model is available here: http://www.maximintegrated...
    Posted to Custom IC Design (Forum) by Politekniko on Fri, Jan 17 2014
  • Virtuosity: 15 Things I Learned in December 2013 by Browsing Cadence Online Support

    With this month's title, I'll need to start adding the year, as this marks the one-year anniversary of the montly series. I know it's been a useful monthly exercise for me. Hopefully it has been helpful for everyone out there as well. Application Notes 1. How to Utilize a Windowing Technique...
    Posted to Custom IC Design (Weblog) by stacyw on Fri, Jan 17 2014
  • how to add a stochastic noise to vsource

    hello, I want to add a stochastic noise to vsource, such as gauss noise. i note that there is a "noise file" field in properies of vsource. (1) Could I use this "noise file" to add a stochastic noise. how to write this " noise file" (2) Is there any other methods adding...
  • Re: How to add noise in v source?

    Do you know how to add a stochastic noise to vsource? thank you very much!
    Posted to Custom IC Design (Forum) by smalldragon on Mon, Jan 6 2014
  • Modify netlist of a block and resimulate (CDL.... CDF....)

    Hello everyone, I am trying to pinpoint a layout error mechanism by modifying the av_extracred view netlist and resimulating the testbench. I have managed to create a manually written netlist as a spectre view before by following this tutorial: http://www.cadence.com/Community/blogs/rf/archive/2009/01...
    Posted to Custom IC Design (Forum) by cozdag on Sat, Dec 28 2013
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