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  • RF Front end Receiver

    Hi, We are designing a RF Front end receiver in which we are proceeding with a PSS, PAC, etc analyses..... 1. We have plotted Conversion Gain Vs LO power by doing PSS followed by PAC analyses. So, can we plot the same CG by varying RF. 2. Can we plot Noise Figure Vs RF frequency. Please, get me the valuable...
    Posted to RF Design (Forum) by Kiran1507 on Mon, Jan 20 2014
  • Have You Tried the New Transmission Line Library (rfTlineLib)?

    Happy New Year! Have you tried the new Transmission Line Library (rfTlineLib) yet? In case you missed it, rfTlineLib was introduced in IC 6.1.6 ISR1 plus MMSIM 12.1.1 -or- MMSIM13.1. You may wonder....Why should I use the new rfTlineLib ? Well.....here are a few reasons: Accurate and robust Consistent...
    Posted to RF Design (Weblog) by Tawna on Fri, Jan 3 2014
  • SpectreRF Tutorials and Appnotes... Shhhh... We Have a NEW Best Kept Secret!

    It's been a while since you've heard from me...it has been a busy year for sure. One of the reasons I've been so quiet is that I was part of a team working diligently on our latest best kept secret: The MMSIM 12.1.1/MMSIM 13.1 Documentation has been completely revised. It is a great source...
    Posted to RF Design (Weblog) by Tawna on Tue, Dec 17 2013
  • Re: spectreRF pss analysis : formula for PAE

    There is a worked example of this in Article 1837740 In this example (and I recommend looking at this Article if you haven't already to see the assumptions that were made and the circuit that was being simulated), it explains... The spectralPower function assumes that the power is going into the...
    Posted to RF Design (Forum) by Tawna on Thu, Nov 7 2013
  • spectreRF pss analysis : formula for PAE

    Hi, When using the direct plot option to trace out the PAE (= Pout - Pin / Pdc) after a pss analysis, if the PAE is added to the outputs the formula which gets added to Output window reads as follows : ((100.0 * harmonic ((spectralPower(i("/PORT1/PLUS" ?result "pss_fd") v("/P_out"...
    Posted to RF Design (Forum) by smarjeet on Thu, Nov 7 2013
  • Re: Noise Figure of an upconverting mixer under input IF signal

    I recommend taking a look at the Appendix A of the SpectreRF User Guide (version 12.1.1 or later). There is a more thorough and up to date example of simulating a transmit mixer. Please use that instead. Here is the link to the appendix. http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src...
    Posted to RF Design (Forum) by Tawna on Mon, Nov 4 2013
  • Strange behavior of traponly method (MMSIM/SpectreRF)

    Hi, I'm about to simulate a power amplifier with spectre using mmsim 10.1 and cadence ic 5141. I want to analyze if it oscillates in transient simulations. Therefore I gave an inductor a initial condition which is not 0 so that there is a stimulation. I read the following recommandation to simulate...
    Posted to Custom IC Design (Forum) by norrin on Wed, Oct 16 2013
  • Re: Harmonic balance GMRES Warnings

    Try downloading the latest MMSIM 12.1.1 version from http://downloads.cadence.com . If that doesn't fix the issue, then definitely please file a SR. best regards, Tawna
    Posted to Custom IC Design (Forum) by Tawna on Mon, Sep 16 2013
  • about stability (kf,b1f) simulation for mixer

    Dear All, I would like to know whether we can use the sp or (psp or hbsp) to simulate the stability (kf, b1f) performance for a circuit like mixer (or Tx or Rx). K factor (kf) and b1f are used to check the stability of a linear circuit, right? Does this mean that we can not use these parameters to check...
    Posted to RF Design (Forum) by Jackie Lau on Mon, Aug 26 2013
  • (IC6.1.5.500.12) ADE L messing up sim results(result access). Anyone familiar with that?

    Dear All, I've done extensive searching on forum for this, in vain. However, I am sure that someone else came across this, and maybe my search keywords weren't appropriate. If you know of thread relating to this, please point me to it. From time to time I get the those symptoms (they might all...
    Posted to RF Design (Forum) by ChrisXB on Fri, Jul 19 2013
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