spice

[ivan]

[sorry for the x post]

hi all,

what is a good free spice program?
possibly with a large opAmp library....

thanks
Ivan

 

[[email protected]]

[sorry for the x post]

hi all,

what is a good free spice program?
possibly with a large opAmp library....

LTSpice from Linear Technology (http://www.linear.com/) is hard to
beat. I think they actually call it SwitcherCad 3.

The built-in op amp library is restricted to parts that Linear
Technology makes or second sources, but that is a pretty comprehensive
selection, and it is easy enough to pick up Spice models for other
manufacturers op amps from the manufacturer's web-site. Finding out
where to put these models so that LTSpice can find them is a bit
trickier, but you can ask for advice here or on sci.electronics.cad.

 

[Paul Burke]

Finding out
where to put these models so that LTSpice can find them is a bit
trickier, but you can ask for advice here or on sci.electronics.cad.

I just put them in lib\sub, is that wrong?

 

[JeffM]

[sorry for the x post]

Either don't cross-post or don't apologize--don't do both.

what is a good free spice program?

http://www.google.com/search?q=inurl:giyf+engine+-uk

Learning to use a search engine would be a good skill for you acquire.
This has been asked
http://groups.google.com/groups/search?q=free-SPICE-program+-x-post&scoring=d
and answered
http://groups.google.com/groups/search?q=free-SPICE-program+Linear+OR+LTSpice+-x-post&scoring=d
MANY times before:

 

[Helmut Sennewald]

I just put them in lib\sub, is that wrong?

Hello Paul,

It's ok in principle.
It's the first place where LTspice looks for a model file if you don't
specify the full path.

I prefer to save models and symbols always into the same directory where
I have saved my schematic. If I need a model in five different designs, I
save it into everey design directory. This makes it very easy to archive a
design.
I just zip all the files in the design directory, except the ".raw"-file of
course.

Best regards,
Helmut

 

[ivan]

[sorry for the x post]

hi all,

what is a good free spice program?
possibly with a large opAmp library....

LTSpice from Linear Technology (http://www.linear.com/) is hard to
beat. I think they actually call it SwitcherCad 3.

The built-in op amp library is restricted to parts that Linear
Technology makes or second sources, but that is a pretty comprehensive
selection, and it is easy enough to pick up Spice models for other
manufacturers op amps from the manufacturer's web-site. Finding out
where to put these models so that LTSpice can find them is a bit
trickier, but you can ask for advice here or on sci.electronics.cad.

how do you rotate/mirror parts in LTSpice?

thanks
again
ivan

 

[martin griffith]

[sorry for the x post]

hi all,

what is a good free spice program?
possibly with a large opAmp library....

LTSpice from Linear Technology (http://www.linear.com/) is hard to
beat. I think they actually call it SwitcherCad 3.

The built-in op amp library is restricted to parts that Linear
Technology makes or second sources, but that is a pretty comprehensive
selection, and it is easy enough to pick up Spice models for other
manufacturers op amps from the manufacturer's web-site. Finding out
where to put these models so that LTSpice can find them is a bit
trickier, but you can ask for advice here or on sci.electronics.cad.

how do you rotate/mirror parts in LTSpice?

thanks
again
ivan

pick the part up with the open hand, use CTRL+ E, CTRL+R


martin

 

[Robert Latest]

how do you rotate/mirror parts in LTSpice?

LTSpice comes with a nice manual. And for those that don't want
or can't read, there are icons in the editor window that represent
rotating and mirroring (using a captial letter as an example though,
so I guess we're back at square one for the illiterate).

robert

 

[jasen]

[sorry for the x post]

hi all,

what is a good free spice program?
possibly with a large opAmp library....

LTSpice from Linear Technology (http://www.linear.com/) is hard to
beat. I think they actually call it SwitcherCad 3.

The built-in op amp library is restricted to parts that Linear
Technology makes or second sources, but that is a pretty comprehensive
selection, and it is easy enough to pick up Spice models for other
manufacturers op amps from the manufacturer's web-site. Finding out
where to put these models so that LTSpice can find them is a bit
trickier, but you can ask for advice here or on sci.electronics.cad.

how do you rotate/mirror parts in LTSpice?

ctrl-R / ctrl-E or the E->m or E->3 icons on the toolbar
or rotate/mirror from the edit menu.

Do it before pasting (from the library) or after selecting part(s) to divide/drag

Bye.
Jasen