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Recent content by kparrish

  1. K

    bondwire affecting DC characteristics

    i have a chip of a discrete device (connections are gnd, VS, VG, VD). i have bonded each of these pads to adapters to build a circuit, however I ran into some problems when checking the DC characteristics of the newly bonded device. see attached image of Ids - Vds characteristics. When i...
  2. K

    [SOLVED] Cadence symbol equivalent of Agilent ADS Symbolically Defined Device

    I'm using a three port symbolically defined device in Agilent ADS but am interested in doing my simulations in cadence virtuoso schematic view if possible. Does anyone know what an equivalent to the THREE port SDD is? If i was using only a 2 port SDD i would use VCVS or VCCS in analog lib, but I...
  3. K

    [SOLVED] oscillator simulations using Monte Carlo

    Cadence Spectre, virtuoso 6.1.3.
  4. K

    [SOLVED] oscillator simulations using Monte Carlo

    I'm trying to find how much the oscillating frequency varies using Monte Carlo. I am using the dft command to find the spectrum, but the spectrum isn't plotted for every variation in the monte carlo simulation. I am interested in doing a Monte carlo (or simple parameter sweep(+) and then...
  5. K

    observe cgd, cgs etc as functions of time

    Thanks, this answers my question.
  6. K

    observe cgd, cgs etc as functions of time

    I'm using cadence 2009, spectre simulations, trying to perform a transient simulation that shows several cycles of the signal.
  7. K

    observe cgd, cgs etc as functions of time

    I agree that the bias voltage would change Cgd and Cgs. my question is, with the DC bias voltage constant but the AC signal changing significantly (ie not really a 'small signal', therefore vgs is swinging), how can i observe the change in Cgd and Cgs when i'm doing a transient solution?
  8. K

    observe cgd, cgs etc as functions of time

    I'm designing a circuit that has a Vgs voltage swing that is large enough that i suspect cgd and cgs are changing with time. any suggestions on how I could observe what the values of these are? right now i can only look at the operating points which tells me the values at the bias but not while...
  9. K

    error when trying to use mimcap in pdk

    Thanks for your reply - what should I do with the libInit.il file? also wouldn't a libary not initiating affect all my components, not just this single mimcap?
  10. K

    error when trying to use mimcap in pdk

    I'm getting this error when i try to use a mimcap in my IBM PDK. all my other components seem to work. *Error* index: argument #1 should be a string (type template = "tS") - nil <<< Stack Trace >>> (... in tl9lpMimcapCB ...) (... in cdfAppendParamFields ...) (... in unknown ...)...
  11. K

    Have SCS files, no library - how do i use in Cadence?

    Actually I'm using 5.10.41. Thanks for the tip on cadence forum-i'll try to get some help there, but please let me know if you think of anything else.
  12. K

    Have SCS files, no library - how do i use in Cadence?

    Thanks again for your reply - how do I change the file it points to? Also, currently all the files are .oa files, I don't see any .scs files.
  13. K

    Have SCS files, no library - how do i use in Cadence?

    Thanks for the tip on loading the model files. Is there any way I can create symbols from these models and have them appear in my library so I can use them in schematic view? I understand I will need to load the model file to run the simulation but haven't yet been able to set up the simulation.
  14. K

    Have SCS files, no library - how do i use in Cadence?

    I have some .scs files that are part of a PSP model library. how can I use these in cadence? I tried installing PSP/Simkit, but this didn't seem to contain the files I need to install a library (tech file etc). I would be ok with just being able to use these .scs files in cadence by using them...
  15. K

    induced gate noise model

    I'm trying to construct the induced gate noise macromodel (featured in Tom Lee's book, https://books.google.com/books?id=DzcMK-2mFQUC&printsec=frontcover&dq=tom+lee+rf&hl=en&ei=HpkrTM_CK4P6lweMoLyhBA&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCYQ6AEwAA#v=onepage&q=tom%20lee%20rf&f=false...
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