nobodyo@nobo... wrote:

> Hi,
> 
> 
>>>and how much time does
>>>it take to detect the transition (at 1.5 V) with a comparator and a
>>>comparator-ISR?
>>
>>The device isn't rated to operate at 1.5V.
> 
> 
> The device can operate with an input edge voltage of 1.5 V. This is within
the specification.
> Which input is faster for detecting a relative slow H->L transition
(edge) at that voltage: Digital input or Comparator input?
> 
> Regards
> 
> Rolf F.

oN THE SURFACE IT SHOULDN'T MAKE ANY DIFFERENCE, however I'd go for
the 
digital, since it will probably toggle at a lower threshold anyway.

I know English isn't your first langfuage, but you need to be a bit 
clearer, your last post read as if you were looking at responses based 
on supply voltage NOT input voltage.

Al

This book is out of print but I'll mention it anyway because I see it
used
around a lot.  Not a textbook, but an invaluable compendium of hardware
design rules of thumb:

"Circuit Designer's Companion" by Tim Williams.

Basically reads like the lab notebook of a really smart hardware designer
who's been around the block a bunch of times.  A great hardware design
quick reference.  Mostly overviews of each topic, but covers a practical
minimum of every major gotcha, including bypassing, power and ground
routing, high frequency design, emc, high-current design, etc. on a
practical, hands-dirty, need-to-know-maths-only level.

If you ever see a copy, buy it.

--Bruce

> > There are design rules for this kind of thing
that good
> > text books will teach you about.
>
> You know a good one? ;-)

This one is alsog good: "Art of Electronics" by Hill
and Horowitz.

-Sumukh


--- Bruce Cannon <brucecannon@bruc...> wrote:
> This book is out of print but I'll mention it
anyway
> because I see it used
> around a lot.  Not a textbook, but an invaluable
> compendium of hardware
> design rules of thumb:
> 
> "Circuit Designer's Companion" by Tim Williams.
> 
> Basically reads like the lab notebook of a really
> smart hardware designer
> who's been around the block a bunch of times.  A
> great hardware design
> quick reference.  Mostly overviews of each topic,
> but covers a practical
> minimum of every major gotcha, including bypassing,
> power and ground
> routing, high frequency design, emc, high-current
> design, etc. on a
> practical, hands-dirty, need-to-know-maths-only
> level.
> 
> If you ever see a copy, buy it.
> 
> --Bruce
> 
> > > There are design rules for this kind of thing
> that good
> > > text books will teach you about.
> >
> > You know a good one? ;-)
> 
> 
> 


__________________________________