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Noise Margin

Discussion in 'Electronic Design' started by [email protected], Oct 9, 2006.

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  1. Guest

    Hi,
    I'm working on characterizing io cells. I thought of measuring
    Vih,Vil,Voh,Vol. I'm confused with which method to follow. In some
    papers its said negative unity slope method gives pessimistic results.
    The better method would be Maximum square method of measuring SNM. For
    io cells, had anyone done any analysis of this kind. I'm intersted in
    sample spice decks for measuring SNM using MSM.
    Also in -ve unity slope method, does anyone know any in-built hspice
    commands for measuring -ve slopes/directly Vih/Vil. As I need to run
    for around 375 corners, I need some automated way of measuring these
    parameters.
    Any help is appreciated.
    Regards
    Prakash
     
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