A and a manual page explaining how to display simulation data inside xschem. This is a reasonable starting point, my plan is to add features and more user friendly controls after some user feedback. If you try this send comments or suggestions!

Thank you very much for the great tutorial. I am new to xschem, and tried to use this built-in waveform viewer. However, when I load .raw file I got the following error: raw_read(): failed to open file /headless/.xschem/simulations/my_opamp.raw for reading. I can plot the graph by using ngspice command "plot out". I would appreciate it if you could help me to solve this problem. Thank you in advance.

@Yusuke Sakemi in ngspice you need to write the raw file. At the ngspice prompt (or add these commands in xschem) do this:

save all

write my_opamp.raw

To make ngspice automatically generate the raw file do the following: in your spice command block delete the .

dc

and

.save all

and add this:

.options savecurrents

,control

save all

dc v3 0.01 2 0.01

remzerovec

write my_opamp.raw

.endc

Thank you so much. It worked!