Newbie,
In my netlist, how to assign the AS, AD, PS, PD, NRD, NRS?
I've a netlist having the S/D_width =0.54(ECS .ini file defined)
it assign AS= W*0.54, PS= 2*W + 2*0.54, NRD(S) = 0.54/W
how to deduce the number 0.54 and AS can not equal to AD? the same
as PS and PD?
AS=AD=w*a, but PS=PD=W+a*2 because the lateral side of the channel do not count. However, some people use 50% of the lateral side of the channel as a worst case.
PS=PD=W*1.5+a*2.
In "digital integrated circuit design" by Ken Martin they use
You can use Hspice switch to calculate AD, AS, PD and PS, but I usually include these parameteris in the netlist. The effect of diffusion capacitance has a great impact on circuit behavior. You can not use only W and L in a design, its a big mistake.