Add examples for the IHP Open Source PDK
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Holger Vogt
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NAND-2 Ring Oscillator IHP Open PDK
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.lib "$PDK_ROOT/$PDK/libs.tech/ngspice/models/cornerMOSlv.lib" mos_tt
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.subckt nand2 a b vdd vss z
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xm01 vdd a z vdd sg13_lv_pmos l=0.15u w=0.96u as=0.20405p ad=0.20405p ps=2.07u pd=2.07u
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xm02 vss a sig3 vss sg13_lv_nmos l=0.15u w=0.82u as=0.1749p ad=0.1749p ps=1.85u pd=1.85u
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xm03 z b vdd vdd sg13_lv_pmos l=0.15u w=0.96u as=0.20405p ad=0.20405p ps=2.07u pd=2.07u
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xm04 sig3 b z vss sg13_lv_nmos l=0.15u w=0.82u as=0.1749p ad=0.1749p ps=1.85u pd=1.85u
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c4 a vss 0.549f
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c5 b vss 0.578f
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c1 z vss 0.609f
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.ends
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XNAND1 1 1 vd vs 2 nand2
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XNAND2 2 2 vd vs 3 nand2
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XNAND3 3 3 vd vs 4 nand2
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XNAND4 4 4 vd vs 5 nand2
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XNAND5 5 5 vd vs 6 nand2
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XNAND6 6 6 vd vs 7 nand2
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XNAND7 7 7 vd vs 8 nand2
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XNAND8 8 8 vd vs 9 nand2
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XNAND9 9 9 vd vs 10 nand2
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XNAND10 10 10 vd vs 11 nand2
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XNAND11 11 11 vd vs 12 nand2
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XNAND12 12 12 vd vs 13 nand2
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XNAND13 13 13 vd vs 14 nand2
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XNAND14 14 14 vd vs 15 nand2
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XNAND15 15 15 vd vs 16 nand2
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XNAND16 16 16 vd vs 17 nand2
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XNAND17 17 17 vd vs 18 nand2
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XNAND18 18 18 vd vs 19 nand2
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XNAND19 19 19 vd vs 1 nand2
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XNAND20 1 1 vd 0 out nand2
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Vdd vd 0 1.5
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Vss vs 0 0
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.option noinit
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.tran 10p 80n uic
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.control
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pre_osdi ../lib/ngspice/psp103_nqs.osdi
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pre_osdi ../lib/ngspice/psp103.osdi
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set temp=0
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option klu
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run
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rusage
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set xbrushwidth=3
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plot i(Vss) ylimit 0 500u xlimit 50n 60n
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plot out xlimit 50n 60n
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meas tran tdiff TRIG V(out) val=0.7 rise=5 TARG v(out) val=0.7 rise=15
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let freq=10/tdiff
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print freq
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linearize out
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fft out
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plot mag(out) xlimit 300Meg 2300Meg
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meas sp fmax MAX_AT out from=1e8 to=1e9
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echo
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echo
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set temp=120
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run
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plot out xlimit 50n 60n
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meas tran tdiff TRIG V(out) val=0.7 rise=5 TARG v(out) val=0.7 rise=15
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let freq=10/tdiff
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print freq
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linearize out
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fft out
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plot mag(out) xlimit 300Meg 2300Meg
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meas sp fmax MAX_AT out from=1e8 to=1e9
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.endc
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.end
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@ -0,0 +1,17 @@
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H. Vogt, 30.06.2026
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Install IHP PDK from github at https://github.com/IHP-GmbH/IHP-Open-PDK
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Set the environmental variables PDK_ROOT and PDK, e.g.
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PDK_ROOT D:\Spice_general\IHP-Open-PDK
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PDK ihp-sg13g2
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Have the OpenVAF-compiled models for MOS ready: psp103.osdi, psp103_nqs.osdi.
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in .spiceinit, add the following:
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set ngbehavior=hsa
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option KLU
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Run the examples.
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File diff suppressed because it is too large
Load Diff
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*** NMOS and PMOS transistors PSP103.6 IHP Open PDK (Id-Vgs, Vbs) (Id-Vds, Vgs) (Id-Vgs, T) ***
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xm02 2 1 3 4 sg13_lv_nmos l=0.15u w=0.495u as=0.131175p ad=0.131175p ps=1.52u pd=1.52u
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vgsn 1 0 3.5
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vdsn 2 0 0.1
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vssn 3 0 0
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vbsn 4 0 0
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xm01 22 11 33 44 sg13_lv_pmos l=0.15u w=0.99u as=0.26235p ad=0.26235p ps=2.51u pd=2.51u
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vgsp 11 0 -3.5
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vdsp 22 0 -0.1
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vssp 33 0 0
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vbsp 44 0 0
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* IHP Open PDK
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.lib "D:\Spice_general\IHP-Open-PDK\ihp-sg13g2\libs.tech\ngspice\models\cornerMOSlv.lib" mos_tt
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.control
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pre_osdi ../lib/ngspice/psp103.osdi
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set xgridwidth=2
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set xbrushwidth=3
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* NMOS
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dc vgsn 0 1.5 0.05 vbsn 0 -1.5 -0.3
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plot vssn#branch ylabel 'Id vs. Vgs, Vbs 0 ... -1.5'
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plot abs(vssn#branch) ylog ylabel 'Id vs. Vgs, Vbs 0 ... -1.5'
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dc vdsn 0 1.6 0.01 vgsn 0 1.6 0.2
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plot vssn#branch ylabel 'Id vs. Vds, Vgs 0 ... 1.6'
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dc vgsn 0 1.5 0.05 temp -40 160 40
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plot vssn#branch ylabel 'Id vs. Vds, Temp. -40 ... 160'
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plot abs(vssn#branch) ylog ylabel 'Id vs. Vds, Temp. -40 ... 160'
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* PMOS
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dc vgsp 0 -1.5 -0.05 vbsp 0 1.5 0.3
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plot vssp#branch ylabel 'Id vs. Vgs, Vbs 0 ... 1.5'
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plot abs(vssp#branch) ylog ylabel 'Id vs. Vgs, Vbs 0 ... 1.5'
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dc vdsp 0 -1.6 -0.01 vgsp 0 -1.6 -0.2
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plot vssp#branch ylabel 'Id vs. Vds, Vgs 0 ... -1.6'
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dc vgsp 0 -1.5 -0.05 temp -40 160 40
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plot vssp#branch ylabel 'Id vs. Vds, Temp. -40 ... 160'
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plot abs(vssp#branch) ylog ylabel 'Id vs. Vds, Temp. -40 ... 160'
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.endc
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.end
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