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What is saturation velocity in a MOSFET?

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bilalkadri

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MOSFET

What is saturation velocity in a MOSFET
 

Re: MOSFET

I guess it is the speed which flow carrieres saturates. Increasing velocity saturation constrains the current flow across drain.
 

Re: MOSFET

depends on the L and V
 

Re: MOSFET

hi
saturation velocity occurs when electric field across the channel is very high.This velocity saturation is caused by the increased scattering rate of highly energetic electrons, primarily due to optical phonon emission. This effect increases the transit time of carriers through the channel.
hope it clarify your doubt
 

Re: MOSFET

As the length of MOSFET decreases ions saturate early before reaching drain from source .due to these we have early saturation effects and decrease in current .these mainly occurs due to longitudinal voltages in channel from Vds

for furthur references u can refer pg 120 of CMOS Digital Integrated Circuits by kang and lebiebici
 
MOSFET

It happens in short channel devices, where the carrier velocity satuate before the current satuation.
 

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