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Mos switch

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...
 
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...

Depending on the Gate-Source voltage, a MOSFET (or JFET, for that
matter) can operate in either the linear or the saturation region.
 
K

Kevin Aylward

Jan 1, 1970
0
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...

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
www.kevinaylward.co.uk
 
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