I wanted to know if I can plot the various curves needed in gm by Id technique using LTSpice XVII. I basically need to plot the following curves for n channel and p channel devices:
fT vs gm/Id
gm/gds vs gm/Id
Id/W vs gm/Id
How can I do so using LTSPice? If it is not possible, pls advise me on how I can do so using any other windows based free tool.
Thanks for your reply. I have ngspice. But how to enter the schematic in it for plotting the various graphs? As I know, ngspice does not have any GUI for schematic entry. BTW are you aware if ngspice can be used with LTSpice interface?
OK (and thanks for your quick reply). I will use xschem then. I have two queries aligned to it.
1. Should I use NGSpice with Xschem? Or does XSchem have a default simulator with it?
2. Are you aware of any tutorial which shows how to plot any of the above mentioned graphs? I am new to xschem also...