The Cgb and Cdb is defined by layout diffusion size which is AD, PD, AS, PS. But I am confused that when I simulate using level 49 model the Cgb and Cdb exist without writing AD, PD, AS, PS parameter. I wonder how to defind these parameters in hspice program if I don't write them. Thanks!
Hi dear friend
You can specify device characteristics for default values. you can see more information in hspice manual. the default values are determined in technology file.
The Cgb and Cdb is defined by layout diffusion size which is AD, PD, AS, PS. But I am confused that when I simulate using level 49 model the Cgb and Cdb exist without writing AD, PD, AS, PS parameter. I wonder how to defind these parameters in hspice program if I don't write them. Thanks!