HI, Does anyone know what the error is due to in the LVS, read the pins in both files, try flattenin...

Juan Andres

07/10/2023, 1:15 AM

HI, Does anyone know what the error is due to in the LVS, read the pins in both files, try flattening and neither

filter_mag.spice filter.spice filter.mag filter.sch

Juan Andres

07/10/2023, 4:25 AM

@Tim Edwards

Mitch Bailey

07/10/2023, 5:26 AM

Looks like your schematic buses are all shorted in the layout. eg. schematic

Copy code

XC1[3] Fin net2[3] sky130_fd_pr__cap_mim_m3_1 W=30 L=23.42 MF=1 m=1
XC1[2] Fin net2[2] sky130_fd_pr__cap_mim_m3_1 W=30 L=23.42 MF=1 m=1
XC1[1] Fin net2[1] sky130_fd_pr__cap_mim_m3_1 W=30 L=23.42 MF=1 m=1
XC1[0] Fin net2[0] sky130_fd_pr__cap_mim_m3_1 W=30 L=23.42 MF=1 m=1

Layout

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X28 Fin m3_9990_43600# sky130_fd_pr__cap_mim_m3_1 l=2.342e+07u w=3e+07u
X31 Fin m3_9990_43600# sky130_fd_pr__cap_mim_m3_1 l=2.342e+07u w=3e+07u
X6 Fin m3_9990_43600# sky130_fd_pr__cap_mim_m3_1 l=2.342e+07u w=3e+07u
X9 Fin m3_9990_43600# sky130_fd_pr__cap_mim_m3_1 l=2.342e+07u w=3e+07u

cap_mim

devices are only reduced in parallel.

Stefan Schippers

07/10/2023, 7:36 AM

In connections like the one shown in picture xschem creates 4 distinct nets between C1[3:0] and C2[3:0]. If this is not desired and you want to short together the capacitors place a unique label on the net.

Stefan Schippers

07/10/2023, 7:40 AM

1.png

Juan Andres

07/10/2023, 10:49 AM

I don't understand the difference, since they are connected, there shouldn't be the same 4 capacitor connections from home, which in the end will generate individual parallels?

Juan Andres

07/10/2023, 12:52 PM

this can give the error of the instances??

Juan Andres

07/10/2023, 4:23 PM

One question, I did what was recommended and match uniquely comes out, but on the Netgen page it says that it should also come out correctly, what is needed for it to come out like this?

Stefan Schippers

07/11/2023, 7:14 AM

The capacitor arrangments shown in picture are different. The first should not match the second. If you don't set a label on the center net xschem assumes netxxx[3:0], so 4 different nets.

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