From: Jim Thompson
Subject: Re: Don't do this! Just don't!
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Date: Sun, 19 Jan 2003 20:44:58 GMT
NNTP-Posting-Date: Sun, 19 Jan 2003 15:44:58 EST
Organization: Cox Communications
On Sun, 19 Jan 2003 12:46:30 -0800,
John Larkin ,
In Newsgroup: sci.electronics.design,
Entitled: "Don't do this! Just don't!",
Wrote the following:
|OK, every once in a while we need to have a trimpot crank in a little
|bit of DC offset into an opamp or something, and there are those nice
|+-15 or whatever power rails handy. But I see so many presumably
|intelligent engineers do something like this:
| 100r O <-------- small offset
|This is a *very*bad*idea*. I recent sold a bunch of
|amplifier/discriminator boxes because somebody else did this, among
|other dumb things.
|So quit doing this. Just quit it.
John, Why don't you elaborate for the students lurking here, and
explain what the "gotcha" is?
| 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 | |
| Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
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