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RF,Analog

  • 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 Analyses form, you now can focus on getting your...
    Posted to RF Design (Weblog) by Tawna on Thu, Dec 20 2012
  • 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 Analyses form you can now focus on the simulation...
    Posted to RF Design (Weblog) by Tawna on Wed, Dec 19 2012
  • 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 last....here's a preview of the changes to the nport component in MMSIM12.1. 1. The Edit Object Properties/Add Instance form has been revised...
    Posted to RF Design (Weblog) by Tawna on Mon, Nov 19 2012
  • MMSIM12.1 SpectreRF Preview of Coming Attractions! - Part 1

    Greetings! MMSIM 12.1 contains many new features to aid RF designers. Here's a preview of the changes... Documentation Improvements The SpectreRF User Guide is being completely rewritten and updated for MMSIM12.1. Check it out - I'm sure you'll really like it! Harmonic Balance Improvements...
    Posted to RF Design (Weblog) by Tawna on Mon, Nov 12 2012
  • Hiring!! RF Support Engineer

    Raytheon Company, with 2011 sales of $25 billion, is a technology and innovation leader specializing in defense, homeland security and other government markets throughout the world. With a history of innovation spanning 90 years, Raytheon provides state-of-the-art electronics, mission systems integration...
    Posted to Jobs (Forum) by edoub34 on Thu, Oct 18 2012
  • Mixed-Signal Methodology Guide Authors Speak Out

    Cadence recently published the Mixed-Signal Methodology Guide , a first-of-its-kind book that offers a comprehensive review of the design, verification and implementation techniques required for today's complex mixed-signal designs. The book has 11 lead authors, including three from outside Cadence...
    Posted to Industry Insights (Weblog) by rgoering on Thu, Sep 6 2012
  • Measuring Bipolar Transistor ft with Fixed Base-Collector Voltage

    Recently I had a question from reader. He asked a good question: "How do you to measure a bipolar transistor's ft when the base-collector voltage, Vbc, is fixed?" Attached is a modified version of the testbench that allows a user to measure ft with a fixed Vbc. While the aesthetics are...
    Posted to RF Design (Weblog) by Art3 on Tue, Jun 12 2012
  • Mixed-Signal Methodology Guide Sets New Directions for SoCs

    Nearly all systems-on-chip (SoCs) these days are mixed-signal, with increasingly complex analog/mixed-signal (AMS) IP blocks. Meanwhile, analog blocks increasingly contain digital control logic. Yet analog and digital design are still done in relative isolation, using very different methodologies and...
    Posted to Industry Insights (Weblog) by rgoering on Wed, May 30 2012
  • 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
  • Measuring 2-Tone Intermodulation Using Envelope-Following Analysis

    From time to time, SpectreRF users simulate very large, extracted-view circuits in 2+ tone QPSS. In many of those cases, memory requirements exceed the available resources. When that happens and small-signal approximations aren’t applicable, the user is typically stuck. The solution below and attached...
    Posted to RF Design (Weblog) by Tawna on Wed, May 16 2012
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