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RFIC,spectre

  • Monte carlo analysis

    sir i am ,, using IC 5.10.40 in cadence , ,, I want to make monte carlo analysis for my circuit , but my seniors here are telling that monte carlo is not working here in the version ,, how can i check that ?.. i am just beginer , please reply ,,
    Posted to RF Design (Forum) by rakesh reddy on Thu, Mar 20 2014
  • Re: Different op amp gains using different spectre analysis

    Thanks for reply, However I am facing a very strange problem in my simulation, please help me with this: I am running a parametric simulation to experiment & get the optimal bias current of Op-Amp . For this I gave a list of "I_bias" as "5u 7u " in the parametric analysis window...
    Posted to RF Design (Forum) by OneNewBoy on Thu, Mar 21 2013
  • Different op amp gains using different spectre analysis

    Hi all, I am new to analog design. I have created an op-amp schematic and tried to get open loop gain by 2 ways: (Simulation uses cadence virtuoso) 1) Transient analysis: applied a ramp pulse of 0->VDD to +ve input [with a dc value of VDD/2] and kept -ve input to Vdd/2, then plotted Vout vs V+ and...
    Posted to RF Design (Forum) by OneNewBoy on Wed, Mar 20 2013
  • Noise Figure discrepancies in LNA design

    This question is regarding noise figure in a simple common-emitter LNA in the W-Band. There are two main simulations that I am using: A) sp analysis with noise set to "yes" and the input/output ports specified. B) noise analysis with the input port specified, and the output specified as a voltage...
    Posted to RF Design (Forum) by pswirhun on Thu, Jul 26 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
  • High frequency quadrature VCO design with good phase noise

    Hello everyone I am a newbie engineer starting my career in RF IC design and working on designing a high frequency VCO (38 GHz) with good phase noise characteristics. I am using Cadence IC6.1.5-64b.500 version and spectre simulator for the schemtic design and simulations. I have to do everything from...
    Posted to Custom IC Design (Forum) by rohan kr on Thu, Mar 29 2012
  • 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
  • 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
  • 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
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