I’m just learning Spice and Kicad NGSpice. Please check my simple DC Amplifier Circuit using a 741 OpAmp.
The simulation seems to be working but I’ve got some questions as I’m low on the learning curve and just feeling my way along right now …
Question 1 - Searched for 741 OpAmp Model and downloaded from the TI site. Unzipped & got the files & folders below …library LM741-PSpiceFiles lm741.dsn lm741.lib lm741.libsig lm741.opj Do I need all these or just the .lib file?
Question 2 - I put the folder with the stuff shown above in the project folder so they were easy to find BUT … Where would Models (.mod files) and Library files like the above be normally stored on a typical system?
I would think they would all be in the same folder somewhere instead of scattered all over the hard drive … But how do you do it to keep things organized?
Question 3 - I’ve attached an image of the schematic and 741’s Spice Model Editor …
Do things look correct? Did I populate the Spice Model Dialog correctly?
Question 4 - I didn’t see a Integrated Circuit “Type” so I chose “Subcircuit” as opposed to “Code Model”
Was that the right choice? And for future reference how would I know which one to pic? For instane if the model were a partname.mod file or whatever.
Thanks for double checking me and for any help and comments.