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Tawna Wilsey

Currently a Sr. Staff Support Application Engineer at Cadence Design Systems in the Analog/Mixed-Signal/RF Global Customer Support group.

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Distortion Summary in New CDNLive YouTube Video and at IEEE IMS2014 Next Week!
Hi Folks, Check out this great new video on YouTube: CDNLive SV 2014: PMC Improves Visibility and Performance with Spectre APS In this video from CDNLive Silicon Valley 2014, Jurgen Hissen, principal engineer, MSCAD, at PMC, discusses an aggressive RF   Read More »
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How to Specify Phase Noise as an Instance Parameter in Spectre Sources (e.g. vsource, isource, Port)
Last year, I wrote a blog post entitled Modeling Oscillators with Arbitrary Phase Noise Profiles . We now have an easier way to do this. Starting in MMSIM 13.1 , you can specify the phase noise as an instance parameter in Spectre sources, including port   Read More »
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Broadband SPICE -- New Tool for S-Parameter Simulation in Spectre RF
Hi All, Here's another great new feature that I've found very helpful... Broadband SPICE is a new tool for S-parameter simulation in Spectre RF. In the MMSIM13.1.1 ( MMSIM13.1 USR1) release (now available on, a new   Read More »
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New Memory Estimator Helps Determine Amount of Memory Required for Large Harmonic Balance Simulations
Hi Folks, A question that I've often received from designers, "Is there a method to determine the amount of memory required before I submit a job? I use distributed processing and need to provide an estimate before submitting jobs." The   Read More »
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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 ?   Read More »
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SpectreRF Tutorials and Appnotes... Shhhh... We Have a NEW Best Kept Secret!
It's been a while since you've heard from 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   Read More »
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SpectreRF at 2013 IEEE/MTT-S International Microwave Symposium in Seattle, Washington
If you are attending the International Microwave Symposium ( IMS 2013 ) in Seattle (June 2-7, 2013) stop by the Cadence Design Systems booth, #427. We will be showing new MMSIM12.1.1 features including “Smart” HB GUI, Robust and easy to use   Read More »
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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   Read More »
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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   Read More »
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MMSIM 12.1 SpectreRF -- Preview of Coming nport Attractions! Part 2
Greetings, MMSIM 12.1 contains many new features to aid RF designers. Many of these changes are described in my Part 1 blog post. I've saved my favorite for's a preview of the changes to the nport component in MMSIM12.1. 1. The Edit   Read More »
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