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noise summary parameters and noise simualtions

Jeni

Hi,

I have 2 questions:

1. When I use a NEGATIVE resistor to in schematic the noise simulations and noise summary ADD noise - why is that? 

2.In the noise summary there is a noise contributor described as .rg with parameter rn. I understand that  this is the gate resistance noise contribution, but what is the exact calculation of this?

After some investigation, I think that this does not come from the bsim model , since in my bsim model file, the gate resistance is not modeled. I think that it is coming from the simulator itself.

If someone could point me to the exact equation/calculation of this noise it would be fantastic! 

Thanks

Jenia 

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  • Jeni

    Hi Andrew,

    Thank you for replying.

    Regarding the model, do you know how or where should I look for this explicit gate resistance you mentioned, which is not part of the BSIM model?

    I tried to change the rgx parameter inside the subcircuit model in the .scs file, but it had no effect on simulation results, therefore I suspect the simulator takes the resistance value from some other palce..  

    Thanks

    Jenia  

Reply
  • Jeni

    Hi Andrew,

    Thank you for replying.

    Regarding the model, do you know how or where should I look for this explicit gate resistance you mentioned, which is not part of the BSIM model?

    I tried to change the rgx parameter inside the subcircuit model in the .scs file, but it had no effect on simulation results, therefore I suspect the simulator takes the resistance value from some other palce..  

    Thanks

    Jenia  

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