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Mos switch

Discussion in 'Electronic Design' started by [email protected], Oct 8, 2008.

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  1. Guest

    I don't understand how mos switch works: it is designed to work in
    linear or in saturation region?
    In sedra-smith i've found a description of trasmission gate in
    saturation region, instead i thought it worked in linear region...
  2. Guest

    Depending on the Gate-Source voltage, a MOSFET (or JFET, for that
    matter) can operate in either the linear or the saturation region.
  3. If a mosfet is being used as a switch, than it should be designed to operate
    in its linear (resistive triode) region, i.e. hard on. If it is in its
    "saturation" region, i.e its constant current region, then it will have a
    very large on resistance, which is not what one wants for a switch.

    Kevin Aylward
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