ltspice nmos4 and pmos4

[Michael Robinson]

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.

[daku...@gmail.com]

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 ?

[Jim Thompson]

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
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

[RtB]

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