Hi I would like to know if its possible to sweep a parameter

Question

Hi I would like to know if its possible to sweep a parameter of a pulse voltage signal like its TR TF TD etc in the same way as we can sweep the value of a device using `alter` command I m trying to sweep TR and TF parameters but it seems it s not working Fig 2

Nelson Rodriguez · Answer

I solved it but I have a small doubt My solution was to define a parameter ` param TR=8p` and change `alter` command by `alterparam TR = value` Fig 1 However if I define another parameter ` param TF = value` I get an error indicating that this second parameter is unknown Fig 2 < Stefan Schippers> < Harald Pretl> maybe you know

Nelson Rodriguez · Answer

I don t know what s happening It worked some minutes ago now it s not identifying the parameter

Nelson Rodriguez · Answer

Ok it seems that I have to add the parameters between quotes Fig1 I did that because I found in the manual this Fig 2 it s like when a parameter is send as a function argument it must go between quotes

Stefan Schippers · Answer

Also the manual states that a `reset` instruction is needed after an alterparam for the change to take effect in the netlist so if you want to run another simulation with changed parameters the sequence is ``` control tran 1n 3u alterparam TR= reset tran 1n 3u endc```

Nelson Rodriguez · Answer

Thanks < Stefan Schippers>