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Newbie level 4
Hi everyone,
I'm currently trying to use the gm/Id method in order to design an OTA.
Therefore, I want to plot the required graphs for this method that correspond to the technology I use.
Here is what I do :
For the Id/(W/L) graph versus gm/Id, I plot Id vs Vgs and get gm by taking the gm vs vgs derivative and I do that for a fixed width and different transistor lengths.
My problem is that gm/Id graphs vary with length and so how am I supposed to plot Id/(W/L) graph versus gm/Id for different lengths on the same graph when I have different X axis ?
Same thing for fT vs. gm/Id.
Thanks for your answers
I'm currently trying to use the gm/Id method in order to design an OTA.
Therefore, I want to plot the required graphs for this method that correspond to the technology I use.
Here is what I do :
For the Id/(W/L) graph versus gm/Id, I plot Id vs Vgs and get gm by taking the gm vs vgs derivative and I do that for a fixed width and different transistor lengths.
My problem is that gm/Id graphs vary with length and so how am I supposed to plot Id/(W/L) graph versus gm/Id for different lengths on the same graph when I have different X axis ?
Same thing for fT vs. gm/Id.
Thanks for your answers