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< title > XSCHEM TUTORIAL< / title >
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< h1 > TUTORIAL: RUN A SIMULATION WITH XSCHEM < / h1 >
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here some instructions to create a schematic and run a ngspice transient sim in XSCHEM:
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< li > Build and install xschem from svn head.< / li >
< li > Create some empty directory (in my examples i use ~/x)< / li >
< li > cd ~/x< / li >
< li > ~/bin/xschem rlc.sch (use the actual xschem install path). xschem will warn you that the rlc.sch file does not exist. No problem.< / li >
< li > Press Insert key< / li >
< li > Navigate in the file selector to .../share/xschem/xschem_library/devices< / li >
< li > Select 'capa.sym' and press 'Open'< / li >
< li > Select the capacitor, press 'm' and place it somewhere< / li >
< li > Press 'Insert' again and place 'res.sym' and then again 'ind.sym'< / li >
< li > Again, press 'Insert' and place 'vsource_arith.sym'< / li >
< li > By selecting (left btn click) and moving ('m') place the components like in this picture:< / li >
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< img src = "tutorial_run_simulation_01.png" width = "640" >
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< li > Press the right mouse button on the capacitor and set its 'value=' attribute to 50nF:< / li >
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< img src = "tutorial_run_simulation_02.png" width = "640" >
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< li > Do the same for the inductor (10mH) and the resistor (1k)< / li >
< li > Set the voltage source VOL to: "'3*cos(time*time*time*1e11)'" (include quotes, single and double):< / li >
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< img src = "tutorial_run_simulation_03.png" width = "640" >
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< li > Pressing the 'w' key and moving the mouse you draw wires, wire the components as shown (press 'w', move the mouse and click, this draws a wire segment):< / li >
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< img src = "tutorial_run_simulation_04.png" width = "640" >
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< li > Press 'Insert key and place one instance of 'lab_pin', then use the right mouse button to change its 'lab' attribute to A:< / li >
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< img src = "tutorial_run_simulation_05.png" width = "640" >
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< li > Move the label as shown, (you can use 'Shift+F' to flip and 'Shift+R' to rotate), then using 'c' copy this pin label and edit attributes to create the B and C labels, place all of these as shown:< / li >
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< img src = "tutorial_run_simulation_06.png" width = "640" >
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< li > Select the 'C' label and copy it as shown here, set its lab attribute to 0 (this will be the 0V (gnd node))< / li >
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< img src = "tutorial_run_simulation_07.png" width = "640" >
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< li > Press 'Insert key, place the 'code.sym' symbol, set name and value attributes as follows:< / li >
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< img src = "tutorial_run_simulation_08.png" width = "640" >
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< li > Cosmetics: add 'title.sym' move the circuit (by selecting it dragging the mouse and pressing 'm', if needed). Note that you can do a 'stretch move'operation if you need move components keeping the wires attached; refer to the xschem manual < a href = "http://repo.hu/projects/xschem/xschem_man/commands.html" > here< / a > < / li >
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< img src = "tutorial_run_simulation_09.png" width = "640" >
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< li > The circuit is ready for simulation: press 'netlist' the 'rlc.spice' will be generated in current dir.< / li >
< li > If ngspice is installed on the system press 'Simulate':< / li >
< li > In the simulator window type 'plot a b c':< / li >
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< img src = "tutorial_run_simulation_10.png" width = "640" >
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< li > If you set 'Simulation -> Configure simulators and tools -> Ngspice Batch' and press 'Simulate' again the sim will be run in batch mode, a 'rlc.raw' file will be generated and a 'rlc.out' file will contain the simulator textual output.< / li >
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