Hi Everything seems well in my LVS devices and nets but the open-source-silicon.dev #sky130

Join Slack

Hi, Everything seems well in my LVS (devices and n...

# sky130

Hugo Dias

11/27/2022, 3:19 PM

Hi, Everything seems well in my LVS (devices and nets), but the pin doesn't match. I dont know why :/

comp.out

Mitch Bailey

11/27/2022, 3:53 PM

Looks like your xschem netlist doesn’t have the standard cell library included. Maybe #lvs is a good place to ask in the future.

Hugo Dias

11/27/2022, 4:17 PM

@Mitch Bailey

Mitch Bailey

11/27/2022, 4:40 PM

Is this output in your LVS netlist? Can you share your spice file?

Hugo Dias

11/27/2022, 5:55 PM

This is the edit window showing what have inside the TT Models. I think the std lib is in that.

Hugo Dias

11/27/2022, 5:56 PM

** sch_path: /home/hugodg/projects-sky130/temp-sensor/sigma-delta_modulator/xschem/sigma_tb-tran.sch **.subckt sigma_tb-tran vin in GND PULSE (0 1.8 0 2m 2m 0 2m) .save i(vin) vpwr vpwr GND 1.8 .save i(vpwr) V3 clk GND pulse 0 1.8 '0.495/ 10e6 ' '0.01/10e6 ' '0.01/10e6 ' '0.49/10e6 ' '1/10e6 ' x1 vpwr clk out in vpwr GND vd sigma-delta vd vd GND 1.8 .save i(vd) ** begin user architecture code *cmd step stop *PULSE ( V1 V2 TD TR TF PW PER PHASE) .control destroy all save all set color0=white set color1=black set temp=27 tran 10n 2m run plot in out .endc .lib /usr/local/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice tt .include /usr/local/share/pdk/sky130A/libs.ref/sky130_fd_sc_hd/spice/sky130_fd_sc_hd.spice ** end user architecture code **.ends * expanding symbol: *+ /home/hugodg/projects-sky130/temp-sensor/sigma-delta_modulator/xschem/sigma-delta.sym # of pins=7 ** sym_path: /home/hugodg/projects-sky130/temp-sensor/sigma-delta_modulator/xschem/sigma-delta.sym ** sch_path: /home/hugodg/projects-sky130/temp-sensor/sigma-delta_modulator/xschem/sigma-delta.sch .subckt sigma-delta vpwr clk out in reset_b_dff gnd vd *.ipin in *.iopin gnd *.iopin clk *.iopin out *.iopin reset_b_dff *.iopin vpwr *.iopin vd ** begin user architecture code ** end user architecture code XC1 in_comp gnd sky130_fd_pr__cap_mim_m3_1 W=27.196 L=27.196 MF=1 m=1 XR2 Q in_comp gnd sky130_fd_pr__res_xhigh_po_0p35 L=36 mult=1 m=1 XR1 in_comp in gnd sky130_fd_pr__res_xhigh_po_0p35 L=36 mult=1 m=1 XN1 out_comp in_comp gnd gnd sky130_fd_pr__nfet_01v8 L=0.15 W=1 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' + as='int((nf+2)/2) * W/nf * 0.29' pd='2*int((nf+1)/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 mult=1 m=1 XP1 out_comp in_comp vd vd sky130_fd_pr__pfet_01v8 L=0.15 W=3 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29' + pd='2*int((nf+1)/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 mult=1 m=1 x1 clk out_comp reset_b_dff GND GND VPWR VPWR Q out sky130_fd_sc_hd__dfrbp_1 .ends .GLOBAL GND .end

Mitch Bailey

11/27/2022, 6:01 PM

Well that’s not an LVS netlist. (or at least not what I’m used to seeing). xschem has an option under the simulation menu to create an LVS netlist.

Hugo Dias

11/27/2022, 6:16 PM

** sch_path: /home/hugodg/projects-sky130/temp-sensor/sigma-delta_modulator/xschem/sigma-delta.sch .subckt sigma-delta in gnd clk out reset_b_dff vpwr vd *.PININFO in:I gnd:B clk:B out:B reset_b_dff:B vpwr:B vd:B XC1 in_comp gnd sky130_fd_pr__cap_mim_m3_1 W=27.196 L=27.196 MF=1 m=1 XR2 Q in_comp gnd sky130_fd_pr__res_xhigh_po_0p35 L=36 mult=1 m=1 XR1 in_comp in gnd sky130_fd_pr__res_xhigh_po_0p35 L=36 mult=1 m=1 XN1 out_comp in_comp gnd gnd sky130_fd_pr__nfet_01v8 L=0.15 W=1 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' + as='int((nf+2)/2) * W/nf * 0.29' pd='2*int((nf+1)/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 mult=1 m=1 XP1 out_comp in_comp vd vd sky130_fd_pr__pfet_01v8 L=0.15 W=3 nf=1 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29' + pd='2*int((nf+1)/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 mult=1 m=1 x1 clk out_comp reset_b_dff GND GND VPWR VPWR Q out sky130_fd_sc_hd__dfrbp_1 ** begin user architecture code ** end user architecture code .ends .end

Mitch Bailey

11/27/2022, 6:21 PM

much better, but doesn’t include the skywater library. Maybe you can add that manually and see what happens. (if this is where your pdk is installed)

Copy code

.include /usr/local/share/pdk/sky130A/libs.ref/sky130_fd_sc_hd/spice/sky130_fd_sc_hd.spice

🙌 1

Hugo Dias

11/27/2022, 6:27 PM

It works, thankss 🙂 .LVS done.

👍 1

2 Views

Open in Slack

Previous Next