Modeling Oscillators with Arbitrary Phase Noise Profiles
By Tawna Wilsey
on May 24, 2012
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....
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Filed under: RF design, Virtuoso Spectre, Virtuoso Spectre Simulator GXL, Spectre, Spectre RF, Harmonic Balance, RFIC, VCO, MMSIM, Circuit simulation, RF Simulation, Analog Simulation, ADE, RF, APS, simulation, Oscillator, phase noise, analog, HB, analog/RF, PNoise, HBnoise, noise profiles
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Measuring 2-Tone Intermodulation Using Envelope-Following Analysis
By Tawna Wilsey
on May 16, 2012
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...
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Filed under: RF design, RF Block Simulation, wireless integrated circuit verification, RF designer, Virtuoso Spectre Simulator GXL, Spectre, Spectre RF, Harmonic Balance, spectreRF, RFIC, MMSIM, RF Simulation, Analog Simulation, ADE, RF, RF spectre spectreRF, envelope, simulation, fast envelope, spectre spectreRF, analog, HB, analog/RF, SpectreRF tutorials
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Guidelines for Maximizing Speed vs. Accuracy in SpectreRF simulations - Part 3
By Tawna Wilsey
on March 7, 2012
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...
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Filed under: RF design, Spectre RF, Harmonic Balance, spectreRF, RFIC, MMSIM, shooting newton, Circuit simulation, QPSS Analysis, RF Simulation, Analog Simulation, RF, RF spectre spectreRF, mixer, spectre spectreRF, HB, analog/RF, harmonic trimming
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SpectreRF AppNotes and Tutorials....Still One of our Best Kept Secrets!
By Tawna Wilsey
on January 16, 2012
Some of you may remember the blog written several years ago " Shhhhh...SpectreRF Tutorials and AppNotes - One of Our Best Kept Secrets ". Well, the more things change...the more things stay the same! The location of these tutorials and appNotes...
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Filed under: RF design, Virtuoso Spectre Simulator GXL, Spectre, Spectre RF, Virtuoso Spectre Simulator XL, Harmonic Balance, VCO, MMSIM, Virtuoso, PSS, shooting newton, RF Measurement library, QPSS Analysis, RF Simulation, ADE, RF, RF spectre spectreRF, APS, envelope, fast envelope, mixer, Oscillator, phase noise, analog, HB, analog/RF, PNoise, HBnoise, SpectreRF tutorials, Spectre AppNotes
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Nport Application Note has been Updated and Re-Released
By Tawna Wilsey
on January 3, 2012
Happy New Year! After many requests, I set aside some time and updated the Using the nport in Spectre and SpectreRF Simulations appNote for MMSIM 11.1. You may download the appNote on Cadence Online Support . More nport enhancements are planned, so stay...
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Filed under: RF design, RF Block Simulation, Virtuoso Spectre, Spectre, Spectre RF, Virtuoso Spectre Simulator XL, Harmonic Balance, spectreRF, MMSIM, RF Simulation, RF, APS, spectre spectreRF, nport, nport settings, analog, HB, analog/RF
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Guidelines for Maximizing Speed vs Accuracy for Harmonic Balance - Part 2
By Tawna Wilsey
on November 1, 2011
I am often asked for guidelines on maximizing speed vs. accuracy for SpectreRF harmonic balance simulations . Today, I'll discuss part 2 of the 3 part series consisting of: Which Engine: Spectre or APS? Oversample vs Number of Harmonics Harmonic Trimming...
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Filed under: RF design, Virtuoso Spectre Simulator GXL, Spectre RF, Virtuoso Spectre Simulator XL, Harmonic Balance, spectreRF, MMSIM, ADE-L, RF Simulation, RF, RF spectre spectreRF, HB, analog/RF
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Guidelines for Maximizing Speed vs Accuracy for Harmonic Balance - Part 1
By Tawna Wilsey
on October 7, 2011
Greetings, I am often asked for guidelines on maximizing speed vs. accuracy for SpectreRF harmonic balance simulations. In a series of 3 blogs, I'll discuss some of the "knobs" that you can tweak, those being: * Which Engine: Spectre or...
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Filed under: RF design, Virtuoso Spectre Simulator GXL, Spectre RF, Virtuoso Spectre Simulator XL, Harmonic Balance, spectreRF, RF Simulation, Analog Simulation, ADE, RF, APS, HB, analog/RF
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Measuring Fmax for MOS Transistors
By Arthur Schaldenbrand
on August 11, 2011
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...
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Filed under: RF design, bipolar transistor, RFIC, Virtuoso, Circuit simulation, RF Simulation, RF, simulation, analog/RF, MOS transistors, fmax testbench, measuring Fmax, bsim3v3, Fmax
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Guidelines for Setting Pnoise/HBnoise Sidebands to Get Accurate Results
By Tawna Wilsey
on August 5, 2011
I get quite a few questions from designers along the lines of "How do I set the number of pss/hb harmonics and pnoise/hbnoise sidebands in order to get accurate results?" Here are some general guidelines that I follow: The number of sidebands...
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Filed under: RF design, Spectre RF, Harmonic Balance, spectreRF, PSS, shooting newton, RF Simulation, RF, RF spectre spectreRF, HB, analog/RF, PNoise, HBnoise
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Q&A: TI Wireless Team Describes Advanced Phase-Noise Characterization for RF Oscillators Using SpectreRF
By Helene Thibieroz
on June 15, 2011
In this interview, members of the Texas Instrument wireless group talk about the characterization effort initiated and completed last year between Cadence and IBM using TI RF designs as a pilot. The goal between the two teams was to optimize SpectreRF...
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Filed under: Spectre, Harmonic Balance, spectreRF, VCO, MMSIM, PSS, Circuit simulation, RF, APS, Oscillator, phase noise, analog, Nand Jha, HB, TI, analog/RF, PNoise, characterization, Ted Blank, Texas Instruments
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