NAND2 CMOS help

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Discussion in 'Homework Help' started by geft, Dec 26, 2011.

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  1. Dec 26, 2011 #1
    geft

    Thread Starter New Member

    Dec 8, 2011
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    The question asks to find the threshold voltage for the case where two inputs switch simultaneously. What does this mean?
     
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  2. Dec 26, 2011 #2
    praondevou

    AAC Fanatic!

    Jul 9, 2011
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    Please post the context, maybe the original question with a picture or formula or something.
     
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  3. Dec 26, 2011 #3
    geft

    Thread Starter New Member

    Dec 8, 2011
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    Consider a CMOS NAND2 gate for the case where the two inputs switch simultaneously.
    Assume k_p = k_n = 100 uA/V^2. Derive an expression for V_{th}.

    It then notes that when both transistors are switching simultaneously, NMOSA is in saturation and NMOSB is in linear region.

    What does "two inputs switch simultaneously" mean?
     
    Last edited: Dec 26, 2011
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  4. Dec 26, 2011 #4
    MrChips

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    Oct 2, 2009
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    You cannot get much clearer than that. It means both inputs are changing at the same time.
     
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  5. Dec 26, 2011 #5
    geft

    Thread Starter New Member

    Dec 8, 2011
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    Would that affect the circuit differently compared to when the inputs are both static?
     
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  6. Dec 26, 2011 #6
    MrChips

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    Oct 2, 2009
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    geft likes this.
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