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Spectre RF

  • 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
  • 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
  • Analyzing Distortion With Spectre RF

    Greetings, In the previous appends, we looked at using Shooting Newton Periodic Steady-State analysis to analyze analog circuits. In this append, we will look at using Harmonic Balance Periodic Steady-State, HBPSS, to analyze analog circuits. HBPSS is widely used for RF and microwave circuit design....
    Posted to RF Design (Weblog) by Art3 on Fri, Dec 18 2009
  • Periodic Steady-State Analysis for DC-to-DC Converters

    In " Spectre RF by any other name ...", a non-RF application for Spectre RF's periodic steady-state analysis was introduced. An example of using periodic steady-state analysis [PSS] to simulate the dynamic performance: THD and SFDR, of a switched-current Digital-to-Analog Converter [DAC...
    Posted to RF Design (Weblog) by Art3 on Tue, Jun 30 2009
  • Join us at the Cadence booth at the International Microwave Symposium

    If you listened to Tom's advice on this blog two months ago and registered for the International Microwave Symposium or the RFIC symposium, then you should be at the Boston Convention center now enjoying RFIC talks. Please remember that we are waiting for you at the Cadence booth on the exhibition...
    Posted to RF Design (Weblog) by Hany on Mon, Jun 8 2009
  • Spectre RF By Any Other Name ...

    It has been a while since I last appende d , hope you are well! It was a little bit difficult to come up with a subject to write about and then recently I was in a meeting where we were talking about transient noise analysis. A designer was discussing the issue of analyzing the noise of a Pipeline ADC...
    Posted to RF Design (Weblog) by Art3 on Wed, Apr 22 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
  • SpectreRF Turbo: Parasitic Reduction

    I wanted to share some experiences I had with SpectreRF-Turbo and Parasitic reduction on a recent large benchmark. The things I learned may be helpful to anyone who wants to get the most out of turbo and parasitic reduction. Available in MMSIM7.0.1 and later for RF, turbo accelerates simulation in three...
    Posted to RF Design (Weblog) by dondnile on Mon, Feb 2 2009
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