Wher can I find the default value of the iinstance parameter of BSIM model？

[bujianhui]

Wher can I find the default value of the instance parameter of BSIM model？such as AS， AD ，SA， SB.

 

[erikl]

Re: Wher can I find the default value of the iinstance parameter of BSIM model？

AFAIK there are no default values for AS, AD ; they have to be given for every single MOSFET. Sometimes they are given (or calculated from w and a fixed parameter) in a callable subcircuit:

.subckt mm_nmos d g s b w=0u l=0u as='2*0.42e-6*w' ad='2*0.42e-6*w' ps='4*0.42e-6+2*w' pd='4*0.42e-6+2*w' nrd=0 nrs=0 mltm=1
*

SA & SB values have default values "0" (zero) in the original BSIM model (s. PDF below), or in some cases get extracted values in the individual models from the fab/foundry. View attachment BSIM470_Manual_p166.pdf

 

[bujianhui]

Re: Wher can I find the default value of the iinstance parameter of BSIM model？

Thank you very much！

AFAIK there are no default values for AS, AD ; they have to be given for every single MOSFET. Sometimes they are given (or calculated from w and a fixed parameter) in a callable subcircuit:

.subckt mm_nmos d g s b w=0u l=0u as='2*0.42e-6*w' ad='2*0.42e-6*w' ps='4*0.42e-6+2*w' pd='4*0.42e-6+2*w' nrd=0 nrs=0 mltm=1
*

SA & SB values have default values "0" (zero) in the original BSIM model (s. PDF below), or in some cases get extracted values in the individual models from the fab/foundry. View attachment 87903