I have performed the lab, but my netlists are not ...
# sky130-pv-workshop
j
I have performed the lab, but my netlists are not matching, no DRC error in layout
s
@Junaid Ahmed near the output net you have 2 nfet for ckt 1 while only 1 for ckt 2.
image.png
j
how can I fix it?
s
Send schematic
j
screenshot?
or there is any shared path on the server?
s
Yes screenshot
Send screenshot of schematic please
j
Capture.PNG
t
@Junaid Ahmed: The pFET needs to be a 4-terminal device, so you can connect the bulk terminal to power.
πŸ‘ 1
s
@Junaid Ahmed in the circuit 1, 3pins are connected to out net while in circuit2, 2 pins are only connected
πŸ™Œ 1
j
okay, thanks I'll try to fix
πŸ‘ 1
t
@Junaid Ahmed: The 3-terminal device might be right; the bulk terminal is specified by a string property. If the string says "vdd" then it would be okay.
j
name=M2 L=0.18 W=3 body=vdd nf=3 mult=1 ad="'int((nf+1)/2) * W/nf * 0.29'" pd="'2*int((nf+1)/2) * (W/nf + 0.29)'" as="'int((nf+2)/2) * W/nf * 0.29'" ps="'2*int((nf+2)/2) * (W/nf + 0.29)'" nrd="'0.29 / W'" nrs="'0.29 / W'" sa=0 sb=0 sd=0
I have set it body=vdd
t
@Junaid Ahmed: Okay, then I think the schematic is correct and the error is in the layout. nFET seems to be missing the bulk-to-vss connection in the layout, according to the LVS report.
j
okay
πŸ‘ 1
is there any command to load the previous layout, when I open it, it doesnot show cells
s
try this @Junaid Ahmed
j
Thanks above issue is resolved, now the netlist are matched
πŸ‘ 1
Thanks for your help
πŸ‘ 1
t
@Junaid Ahmed: Put the cursor over empty space to the side and type
s
to select the top level view, then do
x
to expand the cell views.
πŸ™Œ 1
πŸ‘ 2