[sdiy] The TL072 , part 2

[David Ingebretsen]

Hi Ian,

Thanks for the clarification and believe me, I took no offense at your
comments. You are absolutely correct. To design/use an analog computer you
have to understand differentials/integrals.

Actually, I was very interested in your discussion on temperature
compensation and re-read what you have on your web site. Drift is one area
where I never had a good understanding.

Besides, I know you analog guys don't really use math. It's all chicken
bones and voodoo :)

David

David M. Ingebretsen M.S., M.E.
Collision Forensics & Engineering, Inc.
2469 East Fort Union Blvd. STE 114
Salt Lake City, UT 84121
www.CFandE.com

801 733-5458 Office
801 842-5451 Cell

dingebre at CFandE.com
dingebre at 3dphysics.net







-----Original Message-----
From: Ian Fritz [mailto:ijfritz at comcast.net] 
Sent: Friday, February 27, 2009 2:17 PM
To: David Ingebretsen; synth-diy at dropmix.xs4all.nl
Subject: RE: [sdiy] The TL072 , part 2

At 01:27 PM 2/27/2009, David Ingebretsen wrote:
>With my comments anyway, I counseled Dan, " If you want to do intense new
>development and push limits, you will need to bite the bullet and do the
>math. If you want to tweak/implement established designs, [you don't have
to
>know differential calculus]."
>
>I think that's a fair statement. For someone like you, you couldn't do the
>innovative things you were describing without the calculus and I wouldn't
>ever think of suggesting otherwise. For others who aren't doing cutting
edge
>new design, just trying to tweak or combine things, more simple math should
>be fine.

Agreed.  But the original thread had to do with analog computation, 
no?  Since the main use of analog computers is to solve diff eqns, it's 
hard to see why you would want one if you didn't have that level of 
math.  If you just patch up some combination of computational modules you 
will almost certainly get nothing -- the system will either decay to zero 
or take off to the rails.

But anyway, my previous comments were directed to the person who said I was 
wrong about offset causing drift, not to what you were saying.

Ian