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RF Simulation,RF

  • 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
  • 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
  • Guidelines for Maximizing Speed vs Accuracy for Harmonic Balance - Part 2

    I am often asked for guidelines on maximizing speed vs. accuracy for SpectreRF harmonic balance simulations . Today, I'll discuss part 2 of the 3 part series consisting of: Which Engine: Spectre or APS? Oversample vs Number of Harmonics Harmonic Trimming The first post in this series focused on the...
    Posted to RF Design (Weblog) by Tawna on Tue, Nov 1 2011
  • Guidelines for Maximizing Speed vs Accuracy for Harmonic Balance - Part 1

    Greetings, I am often asked for guidelines on maximizing speed vs. accuracy for SpectreRF harmonic balance simulations. In a series of 3 blogs, I'll discuss some of the "knobs" that you can tweak, those being: * Which Engine: Spectre or APS? * Oversample vs Number of Harmonics * Harmonic...
    Posted to RF Design (Weblog) by Tawna on Fri, Oct 7 2011
  • Measuring Fmax for MOS Transistors

    The following question has come up in comments: "How do I measure F max for an MOS transistor?" The measurement methodology -- testbench, analysis, calculator setup, stimulus, etc.-- does not change whether you are measuring bipolar transistors or MOS transistors. On the other hand, the results...
    Posted to RF Design (Weblog) by Art3 on Thu, Aug 11 2011
  • Guidelines for Setting Pnoise/HBnoise Sidebands to Get Accurate Results

    I get quite a few questions from designers along the lines of "How do I set the number of pss/hb harmonics and pnoise/hbnoise sidebands in order to get accurate results?" Here are some general guidelines that I follow: The number of sidebands ( harmonics ) in the simulation can affect performance...
    Posted to RF Design (Weblog) by Tawna on Fri, Aug 5 2011
  • 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
  • Tips for Simulating a Transmit Mixer in SpectreRF

    Some typical questions that I receive from newer SpectreRF users are: How do I simulate a transmit mixer? How do I look at both upper and lower sidebands? How do I set up my simulation for PAC and Pnoise? When I plot my data, how do the indexes correspond with the sidebands? Hopefully the following will...
    Posted to RF Design (Weblog) by Tawna on Thu, Mar 10 2011
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