Validating PMOS BIAS characteristics

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yef smith

Joined Aug 2, 2020
756
Hello ,I have built a PMOS device with Vt=-0.39 shown in the link bellow
Vs=1.8 Vg=-1.5
Vgs=-1.5-1.8=-3.3V
|Vgs-Vt|=|Vgs-Vt|=|-3.3-(-0.39)|=2.91>|Vds|=1.8
I get a result where no matter what is my Source voltage it will alway be in linear state.
although as you can see in the plot bellow i get a good result.
Where did i go wrong in the biasing condition of PMOS?
Thanks.
https://sanjayvidhyadharan.in/Downloads/tsmc_180_nm/tsmc018.lib

1676724949852.png

1676724991585.png
 
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