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[SOLVED] What is V* as a function of Vgs?

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v_naren

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what is V*??

In EECS240 Prof.Boser....can some one tell me what is V* as a function of Vgs?

Long channel:
V*=VGS-Vth

Short channel:
What is relation between V* and VGS-Vth?

I dont want to know that V* is the saturation voltage and it is same as VDSAT in BSIM3 and all...Please only tell me the mathematical relation only betwen V* and VGS-Vth

I dont want any other sort of explanation.....

If I want to set V*=say ...200mV then what am I supposed to set VGS-Vth=?


thanks for any precise replies...
 

Re: what is V*??

v_naren said:
In EECS240 Prof.Boser....can some one tell me what is V* as a function of Vgs?

Long channel:
V*=VGS-Vth

Short channel:
What is relation between V* and VGS-Vth?

I dont want to know that V* is the saturation voltage and it is same as VDSAT in BSIM3 and all...Please only tell me the mathematical relation only betwen V* and VGS-Vth

I dont want any other sort of explanation.....

If I want to set V*=say ...200mV then what am I supposed to set VGS-Vth=?


thanks for any precise replies...
Click to expand...


There is no analytic relationship for V* and Vgs-Vth in short channel devices design. You pick a V* and use the spice simulation to determine the design choice for W.
 

Re: what is V*??

ok...I pick V* and I pick W...ok now in spice I can set W but there is no V* to set!....

U can set V* by setting it thru Vgs-Vth...now we are back to step 1.....there is nothing called V* to set in spice...u can only set Vgs and hence Vgs-Vth...and hence V*...which is why I am asking relation between V* and Vgs-Vth in the first place......
 

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