Subthreshold conduction !!!

[jeet_asic]

CMOS :

If we reduce threshold voltage , subthreshold conduction increases ??? why ? .. if we reduce Vgs below Vt voltage , current doesn't go to zero abruptly , it falls exponentially. So if i reduce Vt , how Subthreshold conduction increases , it should decrease.:?:

 

[Oveis.Gharan]

Please refer to the Weste & Harris CMOS VLSI Design.
You can find out why subthreshold current increases with Threshold voltage decreasing.

 

[jeet_asic]

Sir , i did explore Weste , but i didn't get clear explanation. I have been looking for this doubt for longtime now. But no success. Sir , can you provide some links or any material which clearly explains the reason.

Please refer to the Weste & Harris CMOS VLSI Design.
You can find out why subthreshold current increases with Threshold voltage decreasing.

 

[Oveis.Gharan]

Please read the below paper. You can find a lot of thing through the text.
S. K. Gupta, et al., "Digital Computation in Subthreshold Region for Ultralow-Power Operation: A Device–Circuit–Architecture Codesign Perspective," Proceedings of the IEEE, vol. 98, 2010.
Could you access IEEExplore?

Feel free to ask more ...

 

[jeet_asic]

Could you access IEEExplore?

No sir , i can't access.

 

[ravipandu46338@gmail.com]

Hi jeet_asic,

see the below link you may get the answer for your questioon.....,

https://asic-soc.blogspot.in/search/label/Sub Threshold Leakage

Hope this can help you.....,

With Regards,
D.Raviteja.