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#analog-design
Title
# analog-design
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Matt Venn

03/09/2021, 4:02 PM
@User regarding the need to fix antenna diodes in spice extraction (have to replace X0 to D0), do you know if there's an issue open on this already?
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Stefan Schippers

03/10/2021, 5:55 PM
No, i did not file an issue. I think it is a netlist extraction issue. I don't know if replacing the leading 'X' with 'D' is the correct way to let simulation run or a wrapper subcircuiot (containing the diode) should be provided. @Tim Edwards ?
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Tim Edwards

03/10/2021, 6:08 PM
@Matt Venn, @Stefan Schippers: I have a custom addition in open_pdks that adds a subcircuit definition for the diode. It adds it to
sky130_fd_pr__model__r+c.model.spice
. Probably this is all wrong to do and I should change the magic techfile to extract a "D" device and then fix the diode cells in the standard cell libraries.
👍 1
By "all wrong" I don't mean that there is anything technically wrong with it. It just seems unnecessary.
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Matt Venn

03/10/2021, 6:09 PM
It would be nice to avoid patching extracted files or the pdk to get results