Stacked MOSFETs Small Signal Model

Discussion in 'Homework Help' started by Tarquin Hardwicke, Nov 7, 2013.

  1. Tarquin Hardwicke

    Thread Starter New Member

    Oct 23, 2013
    7
    0
    Two stacked MOSFETs as in the diagram, how can the node voltage V_x be determined (ignoring all body and channel length modulation effects)?
    [​IMG]

    i = g_{m1}V_{GS_1} = g_{m2}V_{GS_2}<br />
V_x = -V_{GS_2} = -\frac{g_{m1}}{g_{m2}}V_{GS_1}?
     
    Last edited: Nov 7, 2013
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
    1,097
    Yes, you have a correct solution. Vx = gm1/gm2 * Vin
     
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