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Re: [AVR-Chat] Negative bias supply for signal conditioning op-amp

Re: [AVR-Chat] Negative bias supply for signal conditioning op-amp

2005-04-01 by Kathy Quinlan

Chuck Hackett wrote:
>>From: Mark Jordan [mailto:mark@cpovo.net]
>>
>>	Have you tried the AVR analog comparator?
>>
>>	Mark Jordan
> 
> 
> Good thought but I'm doing field testing of a signal conditioner to be attached
> to an AVR in the future but for testing this weekend there is no AVR available.
> Also, there will be another stage of conditioning after the op-amp prior to the
> signal being fed to the AVR.
> 
> In doing some web searching I have discovered:
> 
> http://ourworld.compuserve.com/homepages/Bill_Bowden/5volts.gif
> 
> and
> 
> http://www.northcountryradio.com/PDFs/column009.pdf
> 
> which would seem to cover the first part of my query.
> 
> Still would like low cost recommendations for a single supply op-amp that can be
> used for inputs from .1 to .6 vdc.
> 
> BTW: Even though this will eventually feed an AVR is there another list of
> helpful, non-flaming folks that I should direct questions like this to?  I
> realized that it's not directly AVR related.  So far I just subscribe to lists,
> haven't ventured into newsgroups yet.
> 
> Regards,
> 
> Chuck Hackett
You will not get flamed for electronics questions, as just about every 
digital engineer knows, Analog is becoming a BIG part of our jobs as 
clock speed increases.

Regards,

Kat.

List mom

Re: [AVR-Chat] Negative bias supply for signal conditioning op-amp

2005-04-01 by Ralph Hilton

On Fri, 01 Apr 2005 15:54:04 +0800 you wrote:
 
>> Still would like low cost recommendations for a single supply op-amp that can be
>> used for inputs from .1 to .6 vdc.
>> 

LM358 is rail-rail and very cheap. 
LM6462 is a bit more expensive but very low power.

--
Ralph Hilton
http://www.ralphhilton.org
C-Meter: http://www.cmeter.org
FZAOINT http://www.fzaoint.net

RE: [AVR-Chat] Negative bias supply for signal conditioning op-amp

2005-04-01 by Chuck Hackett

> From: Kathy Quinlan
> 
> ....
> You will not get flamed for electronics questions, as just about every
> digital engineer knows, Analog is becoming a BIG part of our jobs as
> clock speed increases.

I certainly didn't mean to imply that I would get flamed here.  I was speaking
about finding another list for non-AVR questions that is as helpful as this
list.  I have seen nothing but helpful folks here.

Thanks to all for your responses, I'm off to check the resources, data sheets,
etc. suggested ...

Cheers,

Chuck Hackett
"Good judgment comes from experience, experience comes from bad judgment"
7.5" gauge Union Pacific Northern (4-8-4) 844
http://www.whitetrout.net/Chuck

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