Re: Wanted: LM-709 (Spice model) National Op-Amp

On Sun, 25 Sep 2005 10:17:33 GMT, Paul Rako <sp_a_mpa_u_l@xxxxxxxxx>
wrote:

[snip]
>
>Mr. (Dr./Prof?) Thompson:

"Mr.", I only have a MSEE.

>What do you use? I hope it is not some proprietary thing
>like Analog Devices' internal SPICE.

I use PSpice A/D v10.5, although I'm trying to make time to evaluate a
newcomer, TTSpiceWorks <http://www.trabucotechnologies.com/>. But it
seems, the older I get the busier I get ;-)

>I hope you will serve as
>judge jury and executioner in our little test.

What "little test" is it? I haven't been following this thread
closely.

>And remember
>everyone-- in my opinion we are mis-applying SPICE. The
>acronym stands for "Simulation Program with Integrated
>Circuit Emphasis" It is not SPBLE. Spible would be
>"Simulation Program with Board-Level Emphasis".

Indeed.

>This is
>why there seems to be such passions aroused when us board
>guys say we don't worship SPICE the way IC designers do.

In the IC world we "back-annotate" to add the strays that result from
layout. Do "board guys" have such a tool?

>BTW, Dave Tamura in the CAD department at National rolled his
>eyes when I told him I said Process and Modeling departments
>cost 5 or 10 million dollars a year for a big semiconductor
>company. He hinted that tens times those numbers is not
>unheard of. He also said that his CAD department is also
>involved in making sure the models conform to reality.
>
[snip]

And Win wonders why discrete MOSFET models are inadequate ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

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