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 Community Search 

Page 1 of 1 (9 items)
  • VCO: PSS and pnoise analysis and Numerical Errors
    Hello,    I am Sivaramakrishna. My query is about the numerical/simulation errors in pnoise/pss analysis of VCO.    I am designing a (CMOS LC-) VCO and Interesting I am getting different phase-noise for the same circuit with with same settings, such as initial conditions, and integration methods(it was suggested that I need ...
    Posted to RF Design (Forum) by rsrk on Wed, Jan 22 2014
  • VCO transient analysis : Convergence Issues.
    Hi,    I am facing convergence issues while doing transient analysis on a LC MOS cross-coupled oscillator.Figure of the NMOS-only cross-coupled oscillator is attached along. Spectre Version :  10.1.0.204 As suggested by Andrew on this forum,  I am doing moderate analysis with integration method : traponly For inductors of ...
    Posted to RF Design (Forum) by rsrk on Tue, Oct 30 2012
  • phase noise analysis - VCO
     Hi,   I have a query regarding calculation of phase noise of VCO by pss and pnoise analysis.  I can plot pnoise and hence can find phase noise at an offset frequency. General method      At the same time, from same analysis I can calculate/estimate output noise, at an offset frequency, due to all ...
    Posted to RF Design (Forum) by rsrk on Thu, Mar 1 2012
  • Re: RE: LC Oscillator - Cadence
     HI Andrew and Tawna   Thank you very much for your support and suggestions.   We are regular customers of cadence and I will ask my system administrator to grant access to the material you have mentioned. Thanks and Regards Siva Rama Krishna
    Posted to RF Design (Forum) by rsrk on Wed, Feb 22 2012
  • Re: LC Oscillator - Cadence
     Hi Andrew!   Thanks a ton. You saved my life. With the options you mentioned, I realized that voltage is not dieing out. I have attached the netlist along this time (apologize that I have not attached previously).   Can you throw some light on what are the differeces with three types of transient analysis (conservatiove, ...
    Posted to RF Design (Forum) by rsrk on Tue, Feb 21 2012
  • Re: LC Oscillator - Cadence
    Hi Andrew,  Thanks for your response. I am trying to simulate an LC oscillator(image is attached along), both capacitor and inductor are taken from analogLib, with L = 1nH and C = 1pF, with initial condition - forced in "object properties" window - of the capacitor to be 1V.  They are ideal with no series ...
    Posted to RF Design (Forum) by rsrk on Tue, Feb 21 2012
  • LC Oscillator - Cadence
     Hi This is could be quite obvious to many of you. Still ... When I tried to simulate ideal LC oscillator with initial conditions(voltage across the capacitor) using cadence tools ... I realised that output voltage is decaying as time progresses. I mean ... without any series resistance across either capacitor and/or ...
    Posted to RF Design (Forum) by rsrk on Tue, Feb 21 2012
  • LC Oscillator - Cadence
     Hi   This is could be quite obvious to many of you. Still ...   When I tried to simulate ideal LC oscillator with initial conditions(voltage across the capacitor) using cadence tools ... I realised that output voltage is decaying as time progresses. I mean ... without any series resistance across either capacitor and/or inductor ...
    Posted to Cadence Academic Network (Forum) by rsrk on Tue, Feb 21 2012
  • Regd. Transient Analysis : save and restore
    Hi   Its regarding the transient analysis that I am struck with and the issue is as follows :   I am trying to simulate a 60+GHz oscillator, its simulating fine but there is a phase shift of oscillations for each successive simulation, though I am forcing initial conditions on few nodes. I would like to know if its possible to ...
    Posted to RF Design (Forum) by rsrk on Tue, Nov 15 2011
Page 1 of 1 (9 items)