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Obtaining zero temperature coefficient

wgtkan
I am trying to simulate to obtain a zero temperature coefficient of an NMOS. I swept gate-source voltages and probed the drain current and did step temperature in parametric analysis and for some reason, I do not get the temperature displayed at different values. I am attaching the image of what I am trying to do.
 
 Thank you in advance.

 

Parents

  •  Hello Andrew and Marc:

     

    What I had originally is exactly as Andrew put it. I swept my VGS from 0.1 – 1.2V and did parametric sweep for temperature – 0:25:100. But I do not get the zero crossing point. I get the same curves at different temperatures. I am using psp model in IBM8HP 130nm process and I have selected tt for the section. Do you think that I have to do it for different corner?

    I re did it this time by sweeping my Gate-source voltage from 200mv to 450mv at the step size of 2mv and a parametric sweep of temperature from 0 to 100 at a step size of 25 and I get the following plot. It doesn’t make no sense.

     

Reply

  •  Hello Andrew and Marc:

     

    What I had originally is exactly as Andrew put it. I swept my VGS from 0.1 – 1.2V and did parametric sweep for temperature – 0:25:100. But I do not get the zero crossing point. I get the same curves at different temperatures. I am using psp model in IBM8HP 130nm process and I have selected tt for the section. Do you think that I have to do it for different corner?

    I re did it this time by sweeping my Gate-source voltage from 200mv to 450mv at the step size of 2mv and a parametric sweep of temperature from 0 to 100 at a step size of 25 and I get the following plot. It doesn’t make no sense.

     

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