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Oscillator

  • Centering a PAC around a PSS oscillator outcome

    Hi All, I would like to run a Periodic AC analysis (PAC) at frequencies around a carrier not known a priori. That is, I have an oscillator whose frequency - of course - is to be determined by simulation. The natural way of simulating an autonomous system and get this information is with the Periodic...
    Posted to RF Design (Forum) by MicheleA on Fri, Jun 13 2014
  • Re: injection locked oscillator phase noise simulation using pss+pnoise

    Here is the article: When simulating an injection locked oscillator and looking at the startup waveform, you are looking for the point where the timing of the oscillator output is stable with reference to the injection source. Note that the amplitude must be at steady-state as well. When you set up your...
    Posted to RF Design (Forum) by Tawna on Fri, May 23 2014
  • Re: Stop Time in Transient Analysis

    Hi Hadi, > Why should we enable conservative in errpreste ? To quote one of my favorite engineers...I've never met a designer who favored a quick result over an accurate one in their final oscillator design... :-) Unless you really understand the simulator options, what each one does, and how...
    Posted to Custom IC Design (Forum) by Tawna on Wed, May 21 2014
  • Re: Stop Time in Transient Analysis

    Hi Hadi, This may be more information than you want to know...but here it goes. :-) When simulating an oscillator in transient analysis, you need to make sure you've started the oscillator (otherwise, you will see a straight line when you simulate). When simulating oscillators, you should set errpreset...
    Posted to Custom IC Design (Forum) by Tawna on Tue, May 20 2014
  • Simulating Crystal Oscillators is Much Easier in MMSIM12.1 - Part 2

    Greetings, Simulating crystal oscillators got a lot easier in MMSIM12.1... We have made enhancements to both Harmonic Balance and transient analyses. In Part 1 , I discussed Improvements to the Harmonic Balance use model. With the new streamlined Choosing Analyses form, you now can focus on getting your...
    Posted to RF Design (Weblog) by Tawna on Thu, Dec 20 2012
  • Simulating Crystal Oscillators is Much Easier in MMSIM12.1 - Part 1

    Greetings! Simulating Crystal Oscillators got a lot easier in MMSIM12.1... We have made enhancments to both Harmonic Balance and Transient analyses. In Part 1, I’ll cover Improvements to the Harmonic Balance use model. With a streamlined Choosing Analyses form you can now focus on the simulation...
    Posted to RF Design (Weblog) by Tawna on Wed, Dec 19 2012
  • Modeling Oscillators with Arbitrary Phase Noise Profiles

    When you need to include noisy oscillators in SpectreRF transceiver simulations, you have at least 3 options: 1) Semi-autonomous simulation is the most accurate approach, recommended whenever the transistor-level model of the oscillator is available. 2) rfLib/osc model is less accurate but it’s...
    Posted to RF Design (Weblog) by Tawna on Thu, May 24 2012
  • SpectreRF AppNotes and Tutorials....Still One of our Best Kept Secrets!

    Some of you may remember the blog written several years ago " Shhhhh...SpectreRF Tutorials and AppNotes - One of Our Best Kept Secrets ". Well, the more things change...the more things stay the same! The location of these tutorials and appNotes still seems to be one of our best kept secrets...
    Posted to RF Design (Weblog) by Tawna on Mon, Jan 16 2012
  • Power Supply model for Oscillator

    Hi! I am trying to simulate a power supply model for an oscillator. I use transient analysis to study the behavior of various parameters.I have an inductor and resistor connected in series to the power supply's positive and negative terminal which is in turn connected to the oscillator. The issue...
    Posted to Custom IC SKILL (Forum) by MTP3 on Thu, Aug 18 2011
  • Q&A: TI Wireless Team Describes Advanced Phase-Noise Characterization for RF Oscillators Using SpectreRF

    In this interview, members of the Texas Instrument wireless group talk about the characterization effort initiated and completed last year between Cadence and IBM using TI RF designs as a pilot. The goal between the two teams was to optimize SpectreRF usage to successfully and efficiently simulate TI...
    Posted to RF Design (Weblog) by helenet on Wed, Jun 15 2011
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