1. Download LTspice IV
Windows version of LTspice: LTspiceIV.exe
Mac os x version of LTspice: LTspiceIV_v2.dmg
2. Download and open the following simple circuit file: rc_highpass.asc
Click on the little running fellow to run the simulation.
3. Try changing the simulation time, frequency, resistor and capacitor values, etc.
4. Download the following sample symbols and sample model file: ALD1101.asy,ALD1102.asy,IRF510.asy,IRF9510.asy, ECE354.libPut the files into a directory called "circuit_sim" (or whatever you choose to name it).
3. Download and open sample.asc.
Right click on the .lib statement in the schematic to edit the location of the
SPICE model library to point at the "circuit_sim" directory you created.
Try running a simulation and plot an Id versus Vds
curve of the transistor in the schematic to make sure that both the symbol
and model libraries have been properly installed.
5. Right click on the .dc statement to change the voltage source to sweep to
VG. Run a simulation again and try plotting an Id versus Vgs curve.
Quick tips on LTspice:
- Right click (not double click) on an item to edit its property.
- You can choose the type of simulation (transcient, ac analysis, dc sweep, etc) under "simulate" - "edit simulation cmd"
- After a simulation, click on a net or device terminal of interest to plot the
voltage or current, respectively.
- A single voltage source can be used as different kinds voltage sources by
changing its property.
- Try to label important nets such as input and output
- You can view the spice netlist under "view" - "spice netlist".
F3: draw a line
F2: add a component
F4: label net
Ctrl+E: flip sideways
There is a LTspice tutorial website located at http://denethor.wlu.ca/ltspice/ and http://ltwiki.org/index.php5?title=SPICE_and_LTspice_Courseware_and_Tutorials
and also some LTspice tutorials available here: scad3.pdf and LTSpiceShortGuide.pdf
(it used to be called switcherCAD)
Finally, a generic spice manual can be found at http://www.eecg.utoronto.ca/~johns/spice/index.html