it might be a beginner question, but on the 1V8 nfet and pfet, what do these paramters actually mean in the design? L and W are self explaining, but what are mult and nf?

Mult is the multiplicity factor, if you put m=2 it means that you have two transistor in parallel. Nf is the number of finger for the transistor. Let's wait more technical details from the expert of the forum 😀

@Roberto Di Lorenzo is right,

mult

is the number of parallel devices. If you use

m=10000

you are simulating 10000 parallel devices but the simulation cost is just 1 mos device. The simulator multiplies all needed parameters (current, capacitances, etc) by 10000.

nf

defines the number of gate fingers. Given W=10 and L=1 you can draw this transistor on the layout in different ways. below the same transistor drawn with nf=1 and nf=2 fingers. The first one has xschem parameters

W=10 L=1 nf=1

, the second has parameters

W=10 L=1 nf=2

. In xschem W is always the total width. In the second case the actual layout has 2 gate fingers each one has width 5 so 5*2=10 is the total W.