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RF design

  • Issue with Envelope analysis

    Hi, I am simulating the I/Q upconversion using port through envelope analysis. The I input pwl file has samples of a cosine of frequency=5MHz and timestep=0.00125us. The Q input pwl file has samples of value=0 and timestep=0.00125us. The original I, Q pwl files have data upto 2ms. I have attached the...
    Posted to RF Design (Forum) by AparnaG on Sat, Mar 8 2014
  • ERROR DURING SIMULATION

    Sir, First of all, let me thank u for helping me in my project work, by giving valuble information. We are using BSIM-CMG (DG-MOSFET) model for circuit analyses and earlier, we were getting the output waveforms as well as pss analysis results by using virtuoso 6.1.4 version. But last day, the version...
    Posted to RF Design (Forum) by aravindkvarier on Tue, Mar 4 2014
  • modelling reflection in Cadence Virtuoso

    Hello Sir, I have been trying to design a UHF passive RFID tag in 130nm on Cadence Virtuoso IC 5.4.1. As for the design of a matching network between Antenna and Rectifier of RFID please tell me how reflections, if not matched, been modelled in Cadence Virtuoso. So whether I have to use any specifice...
    Posted to RF Design (Forum) by Jithin on Wed, Feb 26 2014
  • fully differential opamp .. how to calculate cmrr ??

    I made this schematic and I simulated this I am getting gain ~40dB and UGB 20Mhz, I want to do stability analysis for this fully differential ckt , And I want to find out --- CMRR --- PSRR ---Loop gain (from stability analysis ) How I should use cmdprobe to do stb analysis , please help me ,, adrew sir...
    Posted to RF Design (Forum) by rakesh reddy on Mon, Feb 17 2014
  • Fully differential opamp caluculations

    I made this schematic and I simulated this I am getting gain ~40dB and UGB 20Mhz, I want to do stability analysis for this fully differential ckt , And I want to find out --- CMRR --- PSRR ---Loop gain (from stability analysis ) How I should use cmdprobe to do stb analysis , please help me
    Posted to RF Design (Forum) by rakesh reddy on Tue, Feb 11 2014
  • Unable to run PSS Analysis

    Sir, I have used BSIM-CMG107.0.0 Mosfet Compact model for my thesis work. But when I go for pss analysis, an error is shown saying that the behavioural file that you have given is not supported for pss analysis. The model is actually a verilog-A file. It would be grateful if you give me any solution...
    Posted to RF Design (Forum) by aravindkvarier on Tue, Feb 11 2014
  • Regarding simulation of VARACTORS using MOS and finding quality factor

    hi using IC 5.10.40 I am working on VCO using MOS Varactor(B D S connected and inversion mode)but i am facing the problems listed here.. 1 Finding the capacitance and quality factor. I also want to plot these with tuning voltage. 2 Which analysis i should use for that, 3 If we see the DC operating points...
    Posted to RF Design (Forum) by Manu J Ptidar on Tue, Feb 11 2014
  • Re: VCO: PSS and pnoise analysis and Numerical Errors

    Hi Sivaramakrishna, If this is a strongly nonlinear circuit (e.g. ring oscillator), then pss-shooting is appropriate. Otherwise, I would use hb (harmonic balance). Please check out your setup - very important to get correct results. In my blog: SpectreRF Tutorials and Appnotes... Shhhh... We Have a NEW...
    Posted to RF Design (Forum) by Tawna on Wed, Jan 22 2014
  • STM065 536 Design Kit

    Hi, I am new with Cadence community I hope I get some help. I start to work on the STM065 536 design kit which support RFCMOS as well. I have a problems with the suitable model libraries that I should load in the ADE env in order to simulate some simple circuit, that for example has PMOS and NMOS of...
    Posted to RF Design (Forum) by paderborn on Fri, Jan 10 2014
  • SpectreRF Tutorials and Appnotes... Shhhh... We Have a NEW Best Kept Secret!

    It's been a while since you've heard from me...it has been a busy year for sure. One of the reasons I've been so quiet is that I was part of a team working diligently on our latest best kept secret: The MMSIM 12.1.1/MMSIM 13.1 Documentation has been completely revised. It is a great source...
    Posted to RF Design (Weblog) by Tawna on Tue, Dec 17 2013
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