Stats

  • Locked Locked
  • Replies 5
  • Subscribers 125
  • Views 3492
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

What does "Drain diffusion res squares, Source diffusion res squares, estimated operating region, thermal resistance, num of segments, and thermal capacitance" mean in analogLib's ntft?

yysunj

I want to simulate analogLib's ntft at the cadence virtuoso.

By the way, I do not know What does  "Drain diffusion res squares, Source diffusion res squares, estimated operating region, thermal resistance,num of segments and thermal capacitance" mean in analogLib's ntft. (Please refer to Figure 1.)

                                                      Figure 1

Could you tell me What does  "Drain diffusion res squares, Source diffusion res squares, estimated operating region, thermal resistance, num of segments, and thermal capacitance" mean in analogLib's ntft?

Thank you 

yysunj

Parents

  • Dear yysunj,

    yysunj said:
    Could you tell me What does  "Drain diffusion res squares, Source diffusion res squares, estimated operating region, thermal resistance, num of segments, and thermal capacitance" mean in analogLib's ntft?

    If you examine the graphic you provided, there is a "Help" button. If you click on this button, there is a search field. Entering "ntft" as shown in Figure will provide a link to the symbol for "ntft". Clicking this link shows the result of Figure 2 where I highlight the spectre -h reference for it. The data is also contained in the analogLib reference manual. The terms you mention are all defined and contained in these references.

    The built-in documentation and the On-line Support sites have a tremendous amount of information that can answer most all questions.

    Shawn

    Figure 1

    Figure 2

  • FormerMember
    FormerMember in reply to ShawnLogan

    Figure 1

    Figure 2

  • in reply to FormerMember

    Thank you for your kindly reply.

    I searched reference , but I can not find any information for my question. (Please refer to figure.1)

    In this case, How can I find a answer for my question?

    Please tell me

    Thank you

    yysunj

  • in reply to yysunj

    A good place to look is in the same manual I mentioned with regards to bsimbulk - the Spectre Circuit Simulator Components and Device Models Reference at <SPECTREinstDir>/doc/spectremod/spectremod.pdf - it has a chapter on the RPI TFT models, and it shows the equations for the drain and source resistance.

    However, the nrd/nrs parameters are common to many transistor models, and the idea is that there's a sheet resistance (the model parameter rsh) and the actual resistance is determined by the number of squares of the source/drain area multiplied by that sheet resistance (if you look in the model reference you'll see there are other options for modelling this resistance which include other terms, but generally it's the number of squares times the sheet resistance). As with most planar resistances on silicon, it's the number of squares (i.e. length/width) that determines the amount of resistance.

    Andrew

  • in reply to Andrew Beckett

    Thank you for your clearly reply!

    yysunj

Reply Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.