Parameter Transistor !!!!!

[biolycans]

Hi everyone !!

First Happy New year !

I am trying to design an operational amplifier and the model of the transistors I am using is in this link:

https://www.mosis.com/cgi-bin/cgiwrap/umosis/swp/params/ami-c5/v37p-c5-params.txt

In this file, I don´t know what value of Vth should I choose for my calculations for a NMOS transistor and a PMOS transistor.

Best regards !

Joaquín

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Another important thing is that in my case I chose a value of Vth for a NMOS transistor equal to 0.6176544 and for a PMOs transistor a VTH = -0.9152

 

[dick_freebird]

For an exercise the number is not that important. What
is important, for a real product, is that the model match
reality. Those values look close enough to what the WAT
summary says.

But of course VT is only one of several that matter;
you'd like, for example, to know that your subthreshold
slope is roughly right if you're trying to do something
very low power (Vgs(op)<VT, OK, to a point, but
Vgs(op)<0 to get the drain current where you want it,
not so good).

If you wanted to be thorough you'd find some ID-VD
and ID-VG curves and check out fidelity beyond simple
VT.