ECL logic SPICE models

obtain

apps,

with

and

sorry,

app

on

input,

...

clause

You want Joerg pressing your magic buttons? ...for a fee? Ew!

They ride Honda, not Harley? I've never seen police ride Japanese bikes anywhere. But Folsom PD and the CHP use BMW.

I just wondered whether they didn't use SPICE to model the device before release to production. Maybe they didn't.

It probably came out of someone's calculator so they just typed it in. In order not to make a mistake ...

Lot of Japanese bikes in AZ>

...Jim Thompson

obtain

apps,

sorry,

Wonderful simple circuits get no respect in certain quarters.

John

That's one definition of "inside the box thinking." It's a shock the first few times you run into it.

Cheers

Phil Hobbs

Yes, Jim, I think I sent that to you back in the day. But, you have to be careful. It really does what is in effect an inverse FFT of the Sparams, so it doesn't include any of the really important data you need to do a good spice simulation when you are concerned more with transient response. IBIS models are a 'little' better, but they are also very behavioral and I was always interested in the little 'gotchas' that following them too closely led to.

Charlie

On Sat, 12 Sep 2009 13:15:00 -0700, Jim Thompson <

Yeah, back in the day at Microsim, there were two guys that had a space lined with curve tracers, oscilloscopes, power supplies and signal generators whose job was to verify that the models and the actual parts agreed with each other, especially when they were doing the digital I/O models. When Orcad and Cadence came in, they were the first ones to go.

Charlie

Of course ;-) ...Jim Thompson

That's exactly the point, especially with LDMOS. When a big old fat one goes phut ... *KABLAM* it's mucho Dolares down the drain. Not the best way to make friends at a new client.

Joerg, You have way too much "phut ... *KABLAM*" in your life! What is it you're doing to cause all that ?:-)

Crikey! Here I am months from the big '70, and I can count all my "phut ... *KABLAM*"'s on one hand... and they were ALL in the lab, NOT in the field, just great entertainment for my technicians... nothing quite like the boss getting knocked off his lab stool to amuse the troops ;-) ...Jim Thompson

Mine are also in the lab. It usually happens when we try to push the envelope a bit too much, when models don't jibe or when something else breaks down and causes a huge reflection or things like that. I do a lot of heavy duty pulse stuff where this is a normal part of life.

You are doing IC design. That's like signal corp versus a job in the artillery. I did some chip designs as well but only a few and, you guessed it, those are run hard along the kablam ridge. "But this will electromigrate itself to death" ... "We have no real estate, got to do it" ... "Yabbut, the design rules and all that" ..."It only needs to live a few hours" ... "Oh".

Oops. It didn't.

They all do :-)

What a pile of horse pucky. Who do you think did Hubble magnetic support, a satellite spinner for objects as big as a car, and automotive environment for years and years and years ?:-)

In my lifetime I had only ONE design with specified short lifetime... a power supply for the TOW missile. Thus it needed no heat sink, but I did end up using a steel TO-3 for thermal mass ;-) ...Jim Thompson

Then why does the electronics in cars croak so often ... ?

Only GM (Government Motors) and Mercedes, judging from local observation ;-) As you may properly deduce from my postings here, I am of the big hammer school... if I can't kill it with a big hammer, get a bigger one. I don't tolerate pansy designers. ...Jim Thompson

Wasn't it Ford who managed to place an ingnition controller hybrid or something similar on top of the engine? I thought that was a rather stupid thing to do. Probably the cause of issues like "doesn't start when still warm".

The electrical failures in my Chrysler weren't truly electrical. They had mounted the alternator on an aluminum strut. Now that was really stupid.

As a consultant, I just politely decline when I realize that the rest of the team ain't up to snuff. After all, that carries some liability risks with it.

I was referring to contemporary auto manufacturers. Back in time Ford certainly had their issues... mostly mechanical. In the late '60's (IIRC) Ford was fond of their ad, "... brighter idea", with a hand-held light bulb. I had my technician blow out a whole case of

Same here, though I'm more often inclined to make them out as asses during a heavily attended design review ;-)

...Jim Thompson

Evidently not the ones that go "phut ... *KABLAM*", unless you're really a closet pyro. ;-)