ltspice nmos4 and pmos4

I have to simulate a CMOS circuit and I am going to try it in LTSpice.  The 
dialog box where you can put in parameters for a mos4 device has no place to 
enter parasitics!  That means I need a subcircuit.  To save time is there 
anyplace where I can grab subcircuits for nmos4 and pmos4 devices?  That 
would save a lot of time, I can just change the values. 

I use HSpice and Ngspice, and for 
both the circuit description(netlist) 
is in the form of a text file. So, 
if I want to override the built-in NMOS/PMOS models in any of my designs, 
I simply add a 
.INCLUDE <model file name> 
to my circuit text file (**.cir)
Is there any way to access/edit the
text form of the netlist in LTSpice ?
  
On Thursday, March 8, 2012 6:18:52 PM UTC-5, Michael Robinson wrote:
> I have to simulate a CMOS circuit and I am going to try it in LTSpice.  The 
> dialog box where you can put in parameters for a mos4 device has no place to 
> enter parasitics!  That means I need a subcircuit.  To save time is there 
> anyplace where I can grab subcircuits for nmos4 and pmos4 devices?  That 
> would save a lot of time, I can just change the values.



On Thursday, March 8, 2012 6:18:52 PM UTC-5, Michael Robinson wrote:
> I have to simulate a CMOS circuit and I am going to try it in LTSpice.  The 
> dialog box where you can put in parameters for a mos4 device has no place to 
> enter parasitics!  That means I need a subcircuit.  To save time is there 
> anyplace where I can grab subcircuits for nmos4 and pmos4 devices?  That 
> would save a lot of time, I can just change the values.

On Thu, 8 Mar 2012 18:18:52 -0500, "Michael Robinson"
<kellrobinson@yahoo.com.no_spam> wrote:

>I have to simulate a CMOS circuit and I am going to try it in LTSpice.  The 
>dialog box where you can put in parameters for a mos4 device has no place to 
>enter parasitics!  That means I need a subcircuit.  To save time is there 
>anyplace where I can grab subcircuits for nmos4 and pmos4 devices?  That 
>would save a lot of time, I can just change the values. 
>

Does LTspice have the capability to do calculations from W and L to
get AD, AS, PD, PS, NRD and NRS?  PSpice does.  All you need to do is
put the equation in the "Template".  (All you need to know besides W
and L is hdif to "standardize" the equations.)
		
                                        ...Jim Thompson
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| James E.Thompson, CTO                            |    mens     |
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W dniu 2012-03-09 18:47, Jim Thompson pisze:
> Does LTspice have the capability to do calculations from W and L to
> get AD, AS, PD, PS, NRD and NRS?  PSpice does.  All you need to do is
> put the equation in the "Template".  (All you need to know besides W
> and L is hdif to "standardize" the equations.)

Well, LTSpice has several different MOS models... Just look into the 
manual - it took me some time to discover that (described...) feature.

Regards,

Peter Falkowski