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 Change the threshold voltage ?? 

Last post Sun, Feb 1 2009 12:50 AM by sience2peace. 3 replies.
Started by kgulur 26 Sep 2008 02:02 PM. Topic has 3 replies and 3952 views
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  • Fri, Sep 26 2008 2:02 PM

    • kgulur
    • Not Ranked
    • Joined on Fri, Sep 26 2008
    • Posts 4
    • Points 65
    Change the threshold voltage ?? Reply

    Hi,

    I am a student working towards my Master's degree. I am currently doing a project where I have to design a low power circuit. The design consists of multi-Vt nmos and pmos. Can anybody help me out with this? How can I model a high Vt or low Vt transitor in Virtuoso. Although these cells are not available in the standard cell library. Can I create a cell on my own and add it to the existing library? Also, is it possible to simulate such a schematic using Spectre?

    Also, is it possible to generate a layout for any design given the schematic using VirtuosoXL ?

    Thanks in advance. 

    Karthik

    • Post Points: 35
  • Mon, Sep 29 2008 2:49 AM

    • Bernd
    • Top 500 Contributor
    • Joined on Tue, Jul 15 2008
    • Unterhaching, Bavaria
    • Posts 26
    • Points 945
    Re: Change the threshold voltage ?? Reply

    Multi threshold MOS transistors are an option of your technology.
    As a student do you design in a real technology?
    Will your design bee manufactured?
    You should check your technology documentation if you have this
    option available. Then your silicon vendor should provide you
    with the models and layout cells for Low or High Vt MOS transistors.

    This is usually nothing what a designer does itself.
    This requires specialist which have deep knowledge of modeling and
    the manufacturing process.

    Bernd

    Just another lonesome cad guy
    • Post Points: 20
  • Mon, Sep 29 2008 2:43 PM

    • kgulur
    • Not Ranked
    • Joined on Fri, Sep 26 2008
    • Posts 4
    • Points 65
    Re: Change the threshold voltage ?? Reply

    Thanks for the reply. My design won't be fabricated but still, there must be a way to model the transistors and verify them right ? How about implementing DTS ?? That is feasible.... just for simulation purposes...

    • Post Points: 5
  • Sun, Feb 1 2009 12:50 AM

    Change the threshold voltage ?? Reply

     Hi Dear All

    i want to use low VT MOS in my simulation by Hspice but i dont know

    how can i define it?

    help me please.

    thanks 

    • Post Points: 5
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Started by kgulur at 26 Sep 2008 02:02 PM. Topic has 3 replies.