major change in ngspice model referencing, xschem testcases update, q…

…ucs-s examples updated

Signed-off-by: KrzysztofHerman <herman@ihp-microelectronics.com>

ihp-sg13g2/libs.tech/ngspice/.spiceinit

@@ -0,0 +1,21 @@
+*  a custom spiceinit file for IHP-Open-PDK 
+
+* export PDK_ROOT first
+setcs sourcepath = (  $sourcepath $PDK_ROOT/ihp-sg13g2/libs.tech/ngspice/models $PDK_ROOT/ihp-sg13g2/libs.ref/sg13g2_stdcell/spice )
+*echo $sourcepath
+
+*option tnom=28
+option list
+option klu
+option node
+option list
+option opts
+option warn=1
+option maxwarns=10
+option savecurrents
+
+set ngbehavior=hsa
+set noinit
+
+osdi  '$PDK_ROOT/ihp-sg13g2/libs.tech/ngspice/openvaf/psp103_nqs.osdi'
+

ihp-sg13g2/libs.tech/qucs/examples/README.md

@@ -0,0 +1,9 @@
+####################################################
+				IMPORTANT
+####################################################
+
+In order to use the SG13G3 PDK sample schematics, you must add the SG13G3 PDK library to the Qucs-S subcircuit search path:
+
+1) Go to File ->Application Settings ...
+2) Click on the "Locations" tab
+3) On the bottom, click on the "Add Path With Subfolders" button and select the SG13G3 PDK library folder (/home/<username>/.qucs/user_lib)

ihp-sg13g2/libs.tech/qucs/examples/ac_mim_cap.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-603,-96,2362,1375,0.827406,84,45>
+  <View=52,-2,1670,973,1.22451,269,33>
   <Grid=10,10,1>
   <DataSet=ac_mim_cap.dat>
   <DataDisplay=ac_mim_cap.dpl>
@@ -16,18 +16,17 @@
 <Symbol>
 </Symbol>
 <Components>
-  <INCLSCR INCLSCR1 1 120 50 -60 16 0 0 ".LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerRES.lib res_typ\n.LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerCAP.lib cap_typ\n.control\n\n.endc" 1 "" 0 "" 0>
+  <INCLSCR INCLSCR1 1 120 50 -60 16 0 0 "\n.LIB cornerRES.lib res_typ\n.LIB cornerCAP.lib cap_typ\n" 1 "" 0 "" 0>
   <.AC AC1 1 70 190 0 40 0 0 "log" 1 "100k" 1 "300 GHz" 1 "101" 1 "no" 0>
   <GND * 1 360 650 0 0 0 0>
   <Vac V1 1 70 570 18 -26 0 1 "1 V" 1 "1 kHz" 0 "0" 0 "0" 0 "0" 0 "0" 0>
   <GND * 1 70 650 0 0 0 0>
-  <Lib cap_cmim1 1 360 590 -120 -49 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_basic_components" 0 "cap_cmim" 0 "70u" 1 "70u" 1>
   <GND * 1 360 930 0 0 0 0>
   <GND * 1 330 930 0 0 0 0>
   <Lib cap_rfcmim1 1 370 860 50 -16 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_basic_components" 0 "cap_rfcmim" 0 "70u" 1 "70u" 1>
   <Lib rhigh1 1 240 500 -26 -122 0 1 "/home/herman/.qucs/user_lib/IHP_PDK_basic_components" 0 "rhigh" 0 "1.0u" 1 "10u" 1 "1" 1>
   <Lib rhigh2 1 240 780 -26 -122 0 1 "/home/herman/.qucs/user_lib/IHP_PDK_basic_components" 0 "rhigh" 0 "1.0u" 1 "10u" 1 "1" 1>
-  <Lib rhigh3 1 -360 600 50 -26 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_basic_components" 0 "rhigh" 0 "1.0u" 1 "0.5u" 1 "1" 1>
+  <Lib cap_cmim1 1 360 590 -120 -49 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_basic_components" 0 "cap_cmim" 0 "70u" 1 "70u" 1>
 </Components>
 <Wires>
   <360 610 360 650 "" 0 0 0 "">

ihp-sg13g2/libs.tech/qucs/examples/dc_diode_op.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-86,-4,1624,1075,1.25348,0,181>
+  <View=-39,-4,1577,932,0.971123,0,1>
   <Grid=10,10,1>
   <DataSet=dc_diode_op.dat>
   <DataDisplay=dc_diode_op.dpl>
@@ -19,14 +19,13 @@
   <.SW SW1 1 90 280 0 68 0 0 "DC1" 1 "lin" 1 "V2" 1 "0" 1 "1" 1 "301" 1 "false" 0>
   <GND * 1 270 840 0 0 0 0>
   <IProbe Pr1 1 270 640 -37 -26 0 3>
-  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 ".INCLUDE ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/diodes.lib\n.control\npre_osdi ../../.qucs/psp103_nqs.osdi\n.endc" 1 "" 0 "" 0>
-  <.DC DC1 1 90 180 0 41 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
+  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 "\n.INCLUDE diodes.lib\n" 1 "" 0 "" 0>
   <GND * 1 120 840 0 0 0 0>
   <Vdc V2 1 120 750 18 -26 0 1 "1 V" 1>
-  <Lib dantenna1 1 270 750 40 -16 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "dantenna" 0 "8u" 1 "8u" 1>
   <GND * 1 470 840 0 0 0 0>
   <IProbe Pr2 1 470 640 -37 -26 0 3>
   <Lib dpantenna1 1 470 750 40 -16 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "dpantenna" 0 "16u" 1 "16u" 1>
+  <Lib dantenna1 1 270 750 40 -16 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "dantenna" 0 "8u" 1 "8u" 1>
 </Components>
 <Wires>
   <270 590 270 610 "" 0 0 0 "">

ihp-sg13g2/libs.tech/qucs/examples/dc_hbt_13g2.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-201,-94,2082,1128,0.651338,0,0>
+  <View=-108,16,1637,1026,0.89901,0,0>
   <Grid=10,10,1>
   <DataSet=dc_hbt_13g2.dat>
   <DataDisplay=dc_hbt_13g2.dpl>
@@ -16,8 +16,6 @@
 <Symbol>
 </Symbol>
 <Components>
-  <INCLSCR INCLSCR1 1 160 70 -60 16 0 0 ".LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerHBT.lib hbt_typ\n" 1 "" 0 "" 0>
-  <.DC DC1 1 40 160 0 46 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
   <.SW SW1 1 50 250 0 77 0 0 "DC1" 1 "lin" 1 "V2" 1 "0" 1 "1.5" 1 "301" 1 "false" 0>
   <.SW SW2 1 50 470 0 77 0 0 "SW1" 1 "lin" 1 "I1" 1 "0" 1 "5u" 1 "10" 1 "false" 0>
   <IProbe Pr1 1 170 740 -37 -26 0 3>
@@ -28,6 +26,7 @@
   <GND * 1 70 960 0 0 0 0>
   <Idc I1 1 70 910 18 -26 0 1 "0" 1>
   <Lib npn13G1 1 170 850 10 64 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "npn13G2" 0 "1" 1>
+  <INCLSCR INCLSCR1 1 100 100 -60 16 0 0 ".LIB cornerHBT.lib hbt_typ\n" 1 "" 0 "" 0>
 </Components>
 <Wires>
   <170 770 170 800 "" 0 0 0 "">

ihp-sg13g2/libs.tech/qucs/examples/dc_hv_nmos.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-27,-4,1565,985,0.944385,0,0>
+  <View=-39,-4,1577,932,0.971123,0,1>
   <Grid=10,10,1>
   <DataSet=dc_hv_nmos.dat>
   <DataDisplay=dc_hv_nmos.dpl>
@@ -24,7 +24,7 @@
   <GND * 1 450 840 0 0 0 0>
   <Vdc V1 1 160 800 18 -26 0 1 "1 V" 1>
   <GND * 1 160 840 0 0 0 0>
-  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 ".LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerMOShv.lib mos_tt\n.control\npre_osdi ../../.qucs/psp103_nqs.osdi\n.endc" 1 "" 0 "" 0>
+  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 "\n.LIB cornerMOShv.lib mos_tt\n" 1 "" 0 "" 0>
   <.DC DC1 1 90 180 0 41 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
   <.SW SW2 1 260 280 0 68 0 0 "SW1" 1 "lin" 1 "V1" 1 "0" 1 "0.9" 1 "10" 1 "false" 0>
   <Lib sg13_hv_nmos1 1 270 750 55 -121 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "sg13_hv_nmos" 0 "1.0u" 1 "0.45u" 1 "1" 1 "1" 1 "0" 0 "0" 0 "0" 0 "0" 0 "0" 0 "0.346e-6" 0 "0.38e-6" 0 "0.15e-6" 0 "0" 0 "1" 0>

ihp-sg13g2/libs.tech/qucs/examples/dc_hv_pmos.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-85,-4,1583,976,0.90102,0,0>
+  <View=-98,-4,1595,976,0.926531,0,0>
   <Grid=10,10,1>
   <DataSet=dc_hv_pmos.dat>
   <DataDisplay=dc_hv_pmos.dpl>
@@ -26,7 +26,7 @@
   <Vdc V2 1 370 820 -61 -26 0 3 "1 V" 1>
   <Vdc V1 1 80 870 -61 -26 0 3 "1 V" 1>
   <IProbe Pr1 1 190 710 16 -26 0 1>
-  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 ".LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerMOShv.lib mos_tt\n.control\npre_osdi ../../.qucs/psp103_nqs.osdi\n.endc" 1 "" 0 "" 0>
+  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 "\n.LIB cornerMOShv.lib mos_tt\n" 1 "" 0 "" 0>
   <Lib sg13_hv_pmos1 1 190 820 45 -101 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "sg13_hv_pmos" 0 "1.0u" 1 "0.45u" 1 "1" 0 "1" 1 "0" 0 "0" 0 "0" 0 "0" 0 "0" 0 "0.346e-6" 0 "0.38e-6" 0 "0.15e-6" 0 "0" 0 "1" 0>
 </Components>
 <Wires>

ihp-sg13g2/libs.tech/qucs/examples/dc_lv_nmos.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-6,-4,1543,906,0.97033,0,0>
+  <View=12,36,1515,906,1.04368,0,0>
   <Grid=10,10,1>
   <DataSet=dc_lv_nmos.dat>
   <DataDisplay=dc_lv_nmos.dpl>
@@ -24,10 +24,9 @@
   <GND * 1 450 840 0 0 0 0>
   <Vdc V1 1 160 800 18 -26 0 1 "1 V" 1>
   <GND * 1 160 840 0 0 0 0>
-  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 ".LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerMOSlv.lib mos_tt\n.control\npre_osdi ../../.qucs/psp103_nqs.osdi\n.endc" 1 "" 0 "" 0>
-  <.DC DC1 1 90 180 0 41 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
   <.SW SW2 1 260 280 0 68 0 0 "SW1" 1 "lin" 1 "V1" 1 "0" 1 "0.9" 1 "10" 1 "false" 0>
   <Lib sg13_lv_nmos1 1 270 750 55 -121 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "sg13_lv_nmos" 0 "0.35u" 1 "0.34u" 1 "1" 1 "1" 1 "0" 0 "0" 0 "0" 0 "0" 0 "0" 0 "0.346e-6" 0 "0.38e-6" 0 "0.15e-6" 0 "0" 0 "1" 0>
+  <INCLSCR INCLSCR1 1 120 90 -60 16 0 0 ".LIB cornerMOSlv.lib mos_tt\n" 1 "" 0 "" 0>
 </Components>
 <Wires>
   <270 810 270 840 "" 0 0 0 "">
@@ -43,8 +42,8 @@
   <160 830 160 840 "" 0 0 0 "">
 </Wires>
 <Diagrams>
-  <Rect 602 852 868 643 3 #c0c0c0 1 00 1 0 0.1 2 1 0 5e-05 0.000381884 1 -1 0.2 1 315 0 225 1 0 0 "" "" "">
-	<"ngspice/sw1.i(pr1)" #0000ff 0 3 0 0 0>
+  <Rect 602 852 868 643 3 #c0c0c0 1 00 1 0 0.5 10 1 -0.1 0.1 1 1 -1 0.2 1 315 0 225 1 0 0 "" "" "">
+	<"ngspice/i(pr1)" #ff00ff 0 3 0 0 0>
   </Rect>
 </Diagrams>
 <Paintings>

ihp-sg13g2/libs.tech/qucs/examples/dc_lv_pmos.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-85,-4,1583,976,0.90102,0,0>
+  <View=-98,-4,1595,976,0.926531,0,0>
   <Grid=10,10,1>
   <DataSet=dc_lv_pmos.dat>
   <DataDisplay=dc_lv_pmos.dpl>
@@ -26,7 +26,7 @@
   <Vdc V2 1 370 820 -61 -26 0 3 "1 V" 1>
   <Vdc V1 1 80 870 -61 -26 0 3 "1 V" 1>
   <IProbe Pr1 1 190 710 16 -26 0 1>
-  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 ".LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerMOSlv.lib mos_tt\n.control\npre_osdi ../../.qucs/psp103_nqs.osdi\n.endc" 1 "" 0 "" 0>
+  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 "\n.LIB cornerMOSlv.lib mos_tt\n" 1 "" 0 "" 0>
   <Lib sg13_lv_pmos1 1 190 820 45 -101 0 0 "/home/herman/.qucs/user_lib/IHP_PDK_nonlinear_components" 0 "sg13_lv_pmos" 0 "0.35u" 1 "0.34u" 1 "1" 0 "1" 1 "0" 0 "0" 0 "0" 0 "0" 0 "0" 0 "0.346e-6" 0 "0.38e-6" 0 "0.15e-6" 0 "0" 0 "1" 0>
 </Components>
 <Wires>

ihp-sg13g2/libs.tech/qucs/examples/resistors.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=-288,-4,1765,1119,1.04363,0,0>
+  <View=-143,-4,1620,1016,0.890196,0,0>
   <Grid=10,10,1>
   <DataSet=resistors.dat>
   <DataDisplay=resistors.dpl>
@@ -22,7 +22,7 @@
 </Symbol>
 <Components>
   <.SW SW1 1 90 280 0 68 0 0 "DC1" 1 "lin" 1 "V2" 1 "0" 1 "10" 1 "301" 1 "false" 0>
-  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 ".LIB ../../.qucs/IHP-Open-PDK-main/ihp-sg13g2/libs.tech/ngspice/models/cornerRES.lib res_wcs\n.control\nop\n.endc" 1 "" 0 "" 0>
+  <INCLSCR INCLSCR1 1 130 50 -60 16 0 0 "\n.LIB cornerRES.lib res_wcs\n" 1 "" 0 "" 0>
   <Vdc V2 1 110 800 18 -26 0 1 "1 V" 1>
   <GND * 1 250 950 0 0 0 0>
   <GND * 1 110 950 0 0 0 0>
@@ -43,7 +43,6 @@
   <GND * 1 1040 920 0 0 0 0>
   <Idc I1 1 790 890 18 -26 0 1 "1 mA" 1>
   <Idc I2 1 1040 890 18 -26 0 1 "1 mA" 1>
-  <.DC DC1 1 90 180 0 41 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "yes" 1 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
 </Components>
 <Wires>
   <110 830 110 950 "" 0 0 0 "">
@@ -71,7 +70,7 @@
 <Diagrams>
   <Rect 553 615 857 473 3 #c0c0c0 1 00 1 0 0.5 10 1 -0.622632 1 7 1 0 0.1 0.525694 315 0 225 1 0 0 "" "" "">
 	<"ngspice/v(div2)" #ff0000 2 3 0 0 0>
-	  <Mkr 5.01661 503 -225 3 0 0>
+	  <Mkr 5 503 -225 3 0 0>
 	<"ngspice/i(pr1)" #ff0000 2 3 0 0 0>
 	<"ngspice/v(div1)" #ff00ff 2 3 0 0 0>
 	<"ngspice/v(div3)" #00ff00 2 3 0 0 0>

ihp-sg13g2/libs.tech/qucs/examples/symbols.sch

@@ -1,6 +1,6 @@
 <Qucs Schematic 24.2.0>
 <Properties>
-  <View=56,105,1360,872,1.15274,0,0>
+  <View=46,106,1370,872,1.18538,0,0>
   <Grid=10,10,1>
   <DataSet=symbols.dat>
   <DataDisplay=symbols.dpl>

ihp-sg13g2/libs.tech/qucs/install.py

@@ -49,10 +49,9 @@ def copy_files(source_dir, destination_dir):
 
 def info():
     msg = """
-    This script copies the Qucs-S user library files into 
-    /home/$USER/.qucs/user_lib directory. 
-    It also creates a symbolic link there and compiles and places 
-    PSP103 model in ~/.qucs/ location. 
+    This script:
+    - copies the Qucs-S user library files into /home/$USER/.qucs/user_lib directory. 
+    - compiles and copy PSP103 model in ../ngspice/openvaf location
     Please make sure that you have set up the PDK_ROOT env variable
     export PDK_ROOT=your_location/IHP-Open-PDK 
     """
@@ -82,28 +81,53 @@ def info():
 
     copy_files(source_directory, destination_directory)
 
-    original_file = pdk_root
-    symbolic_link = "/home/" + username + "/.qucs/IHP-Open-PDK-main"
-    # Create the symbolic link
-    if not os.path.exists(symbolic_link):
-        try:
-            os.symlink(original_file, symbolic_link)
-            print(f"Symbolic link '{symbolic_link}' created successfully.")
-        except OSError as e:
-            print(f"Failed to create symbolic link: {e}")
 
+     # Copy examples to "Qucs Home" (/home/<username>/.qucs/)
+    print("Copying examples into Qucs-S Home...")
+    source_directory=pdk_root + "/ihp-sg13g2/libs.tech/qucs/examples"
+    destination_directory = "/home/" + username + "/.qucs/IHP-Open-PDK-SG13G2-Examples_prj"
+
+    if not os.path.exists(destination_directory):
+        os.makedirs(destination_directory)
+
+    copy_files(source_directory, destination_directory)
+    print("Examples copied")
+    print("\n\n#############################################")
+    print("              IMPORTANT NOTE")
+    print("#############################################\n")
+    print("Before using the PDK example schematics, you must add the PDK library path to the Qucs-S search path list.\n")
+    print("Please read the instructions provided in " + destination_directory + "/README.txt\n")
+    print("#############################################\n\n")
+
+
+
+    source_directory = pdk_root + "/ihp-sg13g2/libs.tech/ngspice/openvaf"
+    destination_directory = pdk_root + "/ihp-sg13g2/libs.tech/ngspice/openvaf"
     program_name = "openvaf"
     if is_program_installed(program_name):
-        command = "openvaf psp103_nqs.va --output " + "/home/" + username + "/.qucs/psp103_nqs.osdi"    
-        directory = pdk_root + "/ihp-sg13g2/libs.tech/ngspice/openvaf"
-        print(f"{program_name} is installed and about to run the command '{command}' in a location: {directory} ")	
-        exec_app_in_directory(command, directory)
+        command = "openvaf psp103_nqs.va --output " + destination_directory + "/psp103_nqs.osdi"    
+        print(f"{program_name} is installed and about to run the command '{command}' in a location: {source_directory} ")	
+        exec_app_in_directory(command, source_directory)
     else:
         print(f"{program_name} is not installed.")
 
 
+    original_file =  pdk_root + "/ihp-sg13g2/libs.tech/ngspice/.spiceinit"
+    symbolic_link = "/home/" + username + "/.spiceinit"
+    # Create the symbolic link
+    if not os.path.exists(symbolic_link):
+        try:
+            os.symlink(original_file, symbolic_link)
+            print(f"Symbolic link '{symbolic_link}' created successfully.")
+        except OSError as e:
+            print(f"Failed to create symbolic link: {e}")
 
-
-
-
-
+    original_file =  pdk_root
+    symbolic_link = "/home/" + username + "/.qucs/IHP-Open-PDK-main"
+    # Create the symbolic link
+    if not os.path.exists(symbolic_link):
+        try:
+            os.symlink(original_file, symbolic_link)
+            print(f"Symbolic link '{symbolic_link}' created successfully.")
+        except OSError as e:
+            print(f"Failed to create symbolic link: {e}")

ihp-sg13g2/libs.tech/xschem/install.py

@@ -39,10 +39,10 @@ def is_program_installed(program_name):
 
 def info():
     msg = """
-    This script compiles and places 
-    PSP103 model in ./simulations/ location. 
-    Please make sure that you have set up the PDK_ROOT env variable
-    export PDK_ROOT=your_location/IHP-Open-PDK 
+    This script:
+    - compiles and places PSP103 model in ../ngspice/openvaf/ location. 
+    - creates a symlink to the ../ngspice/.spiceinit file in your $HOME directory
+    Please make sure that you have set up the PDK_ROOT env variable export PDK_ROOT=your_location/IHP-Open-PDK 
     """
     print(msg)
 
@@ -57,16 +57,12 @@ def info():
         source_directory=pdk_root + "/ihp-sg13g2/libs.tech/ngspice/openvaf"
 
     username = os.environ.get("USER")
-    destination_directory = pdk_root + "/ihp-sg13g2/libs.tech/xschem/simulations"
+    destination_directory = pdk_root + "/ihp-sg13g2/libs.tech/ngspice/openvaf"
 
     # Check if the source directory exists
     if not os.path.exists(source_directory):
         print(f"Source directory '{source_directory}' does not exist.")
 
-    # Check if the destination directory exists, if not, create it
-    if not os.path.exists(destination_directory):
-        os.makedirs(destination_directory)
-        print(f"Destination directory '{destination_directory}' created.")
 
     program_name = "openvaf"
     if is_program_installed(program_name):
@@ -77,6 +73,15 @@ def info():
         print(f"{program_name} is not installed.")
 
 
+    original_file =  pdk_root + "/ihp-sg13g2/libs.tech/ngspice/.spiceinit"
+    symbolic_link = "/home/" + username + "/.spiceinit"
+    # Create the symbolic link
+    if not os.path.exists(symbolic_link):
+        try:
+            os.symlink(original_file, symbolic_link)
+            print(f"Symbolic link '{symbolic_link}' created successfully.")
+        except OSError as e:
+            print(f"Failed to create symbolic link: {e}")