naalald
Full Member level 4
Hi,
When simulating a circuit that has several transistors in Hspice, we do not determine the model (one of the models that is defined in the library, for example nch.1 to nch.12) used for each of the transistors. When we run the simulation the software itself considers a model for each transistor (one of the 12 models randomly). Isn't it better that we define one model (for example nch.1) for all NMOS transistors and one model for all PMOS transistors? This will reduce systematic offset. Is this way right or wrong?
Why don't we do this?
Does it have something to do with technology and process?
Any ideas?
When simulating a circuit that has several transistors in Hspice, we do not determine the model (one of the models that is defined in the library, for example nch.1 to nch.12) used for each of the transistors. When we run the simulation the software itself considers a model for each transistor (one of the 12 models randomly). Isn't it better that we define one model (for example nch.1) for all NMOS transistors and one model for all PMOS transistors? This will reduce systematic offset. Is this way right or wrong?
Why don't we do this?
Does it have something to do with technology and process?
Any ideas?