Re: Please clarify European resistor value notation for me

Jim Thompson wrote:

On Tue, 05 Dec 2006 20:01:03 GMT, Joerg
<notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> wrote:


Jim Thompson wrote:


On 5 Dec 2006 11:01:27 -0800, "Mike Noone" <nleahcim@xxxxxxxxx> wrote:



Hi - Can somebody please verify that my understanding of European
resistor value notation is correct? My understanding is that the
magnitude (K/M) replaces the period, so 1K = 1K0, 1.2K = 1K2, 15M =
15M0. Also, when there isn't a magnitude (value under 1K) then an R is
added to the end - so 500 ohms = 500R, 10 ohms = 10R.

Is this all correct?

Why are there two different notation schemes? To me the European
version seems unnecessarily complicated. I just don't see a need for
it.

-Mike


"Periods" have a way of fading away from paper drawings :-(


Not so much anymore but it sure was a problem with the old plotters. Especially when the pens had been in there a while.



Apparently OrCAD Capture has added this feature.


That's why it is important that a CAD system can be set to fixed width font. Mine can do both. With fixed at least you can see that something must be missing.

Just imagine a missing dot on a 2.2ohm inrush limiter and someone puts a 22ohm in there. Click - POOF.


The way I work a missing dot would get caught at LVS (layout versus
schematic), the netlists wouldn't match.


Well, yes, same here. But that doesn't help the poor guy who reads a faded schematic and thinks, wow, I've got that 22ohms right here.

--
Regards, Joerg

http://www.analogconsultants.com
.

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