Hi, I'm replacing generic ngspice resistors with the

sky130_fd_pr__res_xhigh_po_0p35

type resistors, so I've been using magic's device creator to find the appropriate lengths. The computed resistance in magic is different than the resulting resistance in ngspice. For

w=0.35um

and

l=0.5um

magic reports a value of

3.542kOhm

, but ngspice reports a value of

1.950016kOhm

(.op sim @ 27degC). I'm using @User's

sky130_tests/test_res.sch

as a testbench. A couple questions I have about this: Which value should I use? Does magic use a reference temperature? What are some possible (or known) causes for this discrepancy? In

sky130_fd_pr__res_xhigh_po_0p35.model.spice

I see the subcircuit references `sky130_fd_pr__res_xhigh_po__base`; in

sky130_fd_pr__res_xhigh_po__base.model.spice

, why is the

tnom

parameter commented out? I've included pictures to help show what I'm seeing.