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mmsim

  • Q&A: IBM Modeling Team Describes Advanced SOI Qualification Flow In Cadence MMSIM Platform

    Circuits implemented using sub-micron technologies require designers to meet tighter and tighter specifications despite increasing statistical variation and complexity. High correlations between actual silicon and circuit verification using advanced SPICE models are therefore a must to ensure first pass...
    Posted to Custom IC Design (Weblog) by helenet on Wed, Feb 23 2011
  • New Fast Envelope in MMSIM10.1 is *Really* Fast and Accurate!

    Traditionally, envelope analysis is used to simulate circuits with modulated inputs. Envelope analysis is much faster than transient simulation, and is used for simulating spectral regrowth. Regular envelope analysis is "brute force" transistor-level simulation: Simulation time for traditional...
    Posted to RF Design (Weblog) by Tawna on Mon, Nov 15 2010
  • Noise separation in phase noise simulation

    Hello, I'm doing a phase noise simulation in cadence (using MMSIM70) and I'm using the option "noise separation" to determine the amount of noise introduced by each instance in my circuit. However, when i compare the total output noise (in the band of interest) with the sum of the individual...
    Posted to RF Design (Forum) by deepb on Mon, May 24 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
  • Analog Behavioral Modeling - What Language Do You Speak?

    An increasing number of mixed-signal design teams are contemplating adding analog behavioral modeling to their repertoire in order to achieve reasonable simulation speeds. Utilizing analog behavioral models can yield simulation performance improvements that can make full chip verification a reality....
    Posted to Custom IC Design (Weblog) by MS Guy on Tue, Mar 2 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
  • Enhanced pnoise Algorithm to Compute Phase-Noise for VCOs with Bandgap Voltage Reference

    Accurate phase-noise characterization is critical in the design of RF and microwave communication systems. SpectreRF ’s shooting PSS/Pnoise analysis has been the golden simulator for the phase-noise simulation, and close correlation between the simulation results and silicon measurement was well...
    Posted to RF Design (Weblog) by helenet on Fri, May 1 2009
  • Porting EDA Applications To Multicore -- Part 2

    As noted in part one of this blog series, porting the Encounter Digital Implementation System (EDI) to multicore platforms was a challenging task. That’s no less true for Cadence’s efforts to parallelize the Virtuoso Spectre Circuit Simulator, although the challenges were somewhat different...
    Posted to Industry Insights (Weblog) by rgoering on Thu, Apr 30 2009
  • Getting a Feel for RF

    It was a delight when I read the blog by Bill Schweber of TechOnline's RF DesignLine titled “ Getting some basic RF experience ”. I was surprising pleased that somebody took the time to talk about how one might get the feel for RF. That is because what Bob talks about is more or less...
    Posted to Custom IC Design (Weblog) by TomC on Wed, Apr 29 2009
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