Can I change mosfet parameter in PSPICE?

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GMSong

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Hi, I'm trying to make spice simulation.

I have used PSPICE Lite edition, and I got to use this Lspice because of the limit of the PSPICE
(It has number limit to use component)

And I am trying to revise W or L size in LTspice, But it is hard to find it.

Can I adjust W or L size at the LTspice?
 

You ever looked into LTspice help?



M. MOSFET
Monolithic MOSFET:
Syntax: Mxxx Nd Ng Ns Nb <model> [m=<value>] [L=<len>]
+ [W=<width>] [AD=<area>] [AS=<area>]
+ [PD=<perim>] [PS=<perim>] [NRD=<value>]
+ [NRS=<value>] [off] [IC=<Vds, Vgs, Vbs>]
+ [temp=<T>]
Click to expand...

If your question is different, please clarify.
 

I know that I can change model parameter in PSPICE.

But I wonder if I can revise it one by one.

ex) M3 : W=5, L=0.1 , M4 : W=10, L=0.1

How can I do that?

 

FvM said:
You ever looked into LTspice help?

View attachment 168882



If your question is different, please clarify.
Click to expand...
Thanks for your reply.
Can I ask you how to resize L/W at "PSPICE"?

//Sorry If I made any mistake in using this website. I'm a newcomer here.
 

You can override model parameters for each transistor instance, it's basically the same for PSPICE and LTspice. Review the PSPICE reference manual, chapter Analog Devices, MOSFET.
 
Last edited:

I have seen some discussion of how to make the standard
LTSpice FET symbols accept and pass down the netlist,
the geometry params. This is not the default as LTSpice
is meant for "application level" simulations of ICs and
discretes and passives, not IC design. I think (if I recall)
it involved making private MOSFET symbols with more
properties, and a proper netlisting template.

I've picked a different capture and simulation tool-pair
so I did not bother to absorb the info. But at one time
I would have found it useful.

I recommend finding the LTSpice discussion board(s),
maybe start with ltwiki.org and start chasing links.
 
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