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Circuit simulation,RFIC

  • 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 nport (for s-parameter input), and the Transmission...
    Posted to RF Design (Weblog) by Tawna on Thu, May 23 2013
  • Modeling Oscillators with Arbitrary Phase Noise Profiles

    When you need to include noisy oscillators in SpectreRF transceiver simulations, you have at least 3 options: 1) Semi-autonomous simulation is the most accurate approach, recommended whenever the transistor-level model of the oscillator is available. 2) rfLib/osc model is less accurate but it’s...
    Posted to RF Design (Weblog) by Tawna on Thu, May 24 2012
  • Guidelines for Maximizing Speed vs. Accuracy in SpectreRF simulations - Part 3

    Several months ago, I started a 3 part series on Guidelines for Maximizing Speed vs Accuracy for Harmonic Balance simulations. Today, I'll discuss part 3 of the 3 part series consisting of: Which Engine: Spectre or APS? Oversample vs Number of Harmonics Harmonic Trimming The first and second posts...
    Posted to RF Design (Weblog) by Tawna on Wed, Mar 7 2012
  • 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
  • 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
  • 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
  • RF Measurement Library: Capturing Circuit Characterization Setups on the Schematic

    Another design approach that Cadence supports that may not be obvious to all users… The process of setting up a circuit simulation has historically been one of setting up all of the simulation control parameters (i.e. which analysis you want to run, what simulation data you want to save, accuracy...
    Posted to RF Design (Weblog) by alanw on Thu, Jul 16 2009
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