I am working in VLSI company and want to test some analog circuits like Op-Amp integrator, Op-amp DAC etc . For that I want to use ngspice. I dont know how to use it. As i can open xcircuit and draw circuits now but I dont know how to set the value of components (value of R, C etc). Can any one please let me know how to draw circuits with parameters and how to use that. Or if any one has any documnetation or link, please send me that one.
Thanks a lot.
The question is old, but I thought it should be answered with a link to the spice tutorial of xcircuit.
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