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Harmonic Balance

  • 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
  • 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
  • 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
  • MMSIM10.1 -- a release for PA/Transmitter Designers

    Fast Envelope Analysis for APSRF and EVM calculation (+ constellation display) feature in ADE/Ocean was instroduced in MMSIM10.1. Comparing to regular Envelope analysis, fast envelope analysis could reduces simulation time from days to few hours without accuracy lose. That features are loved by PA designers...
    Posted to RF Design (Forum) by DevilScorpion on Tue, Oct 12 2010
  • New Time-Saving Feature in IC6.1.4 ISR2: Plot S-Parameter Data Directly From ViVA!

    If you haven't heard about it....there is a new feature in IC6.1.4 ISR2 which makes troubleshooting circuits containing nports ( s-parameters ) much easier and faster! Starting i n IC6.1.4 ISR2, you can now plot s-parameters directly in ViVA (without having to create a test bench and run a Spectre...
    Posted to RF Design (Weblog) by Tawna on Thu, May 20 2010
  • Using The Composite Triple Beat Source to Speed up QPSS Analysis

    Say you have a design with 4 input frequencies: 3164M (vco), 1449M (tone0), 1456M (tone1), 1442M (tone2). Currently when you do a qpss analysis, you are inserting a total of 4 separate ports in your schematic and running a simulation. There is a divide by 2 in your circuit, so one of the frequencies...
    Posted to RF Design (Weblog) by Tawna on Thu, Jan 14 2010
  • NPORT S-Parameter Model Enhancements

    In MMSIM 7.2, two new parameters have been added to the Spectre nport primitive: datatrunc and causality . In MMSIM 7.1, passivity checking was added. The nport now has causality correction, passivity checking and enforcement, and the ability to remove small couplings terms from the input s-parameter...
    Posted to RF Design (Weblog) by Tawna on Wed, Dec 30 2009
  • 2009 RFIC Symposium in Boston - Are You Going?

    If you are an RFIC designer then I hope you are planning on attending the 2009 RFIC Symposium and the International Microwave Symposium (IMS) which will be held in Boston, Massachusetts, as the centerpieces of Microwave Week 2009, scheduled from Sunday June 7 through Friday June 12, 2009. The 2009 RFIC...
    Posted to RF Design (Weblog) by TomC on Mon, Apr 27 2009
  • HB anaylsis in MMSIM 7.1

    I am using MMSIM 7.1, but HB analysis option is not available in the ADE analyses list. I can chose pss and chose FB engine, but couldn't find any separate HB analyses tab. Any idea ? I am using MMSIM7.1, IC5141 Thanks
    Posted to RF Design (Forum) by Yusuf on Mon, Mar 30 2009
  • Setting Up Harmonic Balance - Part 1

    This is the first of a series of Blogs to talk about how to fill out the forms for Harmonic Balance. I will include our suggested settings and some helpful hints. I will add to these over time as new things come up both from us and our customer base. Harmonic Balance works in the frequency domain and...
    Posted to RF Design (Weblog) by dondnile on Wed, Mar 18 2009
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