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Old 15th December 2004, 06:12 AM   #1
jondoe is offline jondoe  Romania
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Default Can i paralel the 2 opamps in 5532?

Can i use a 5532 but with the opamps in paralel?
I would want to use this circuit
http://www.tnt-audio.com/clinica/dynamicopamp_e.html
but with unity gain and with some easy to find (like the 553*) and inexpensive opamp.
I could use the 5534 but i don't have the tools to compensate it into unity gain (osciloscope etc.).
I tried sometime in the past with 5534 but didn't compensate (or not quite right) and it wouldn't work, it had high dc output & i guess it was oscillating (no surprise here now that i think of it).

Or can i just use a paralel 5532 for a line driver ?
Will there be any problems, load sharing resistors, bias differences ?
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Old 15th December 2004, 05:17 PM   #2
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there was no page where the link pointed..
well, you can parallell opamps, but there's one important rule and that is to use a resistor in series with the output and after that resistor you can tie the outputs together, those particular resistors makes sure that those opamps feels good and delivers!!

>opamp output >------[4,7ohm]------->connect with other opamp/resistor

it doesn't matter if they're on the same chip or not..
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Old 15th December 2004, 06:08 PM   #3
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by the way... there was a guy who buildt a poweramplifier using an unholy amount of small opamps.. just parallelling them into one output.. if i remeber correctly there was 44 pcs per channel!!
-i can't remember his homepage, but i'm sure it's out there...
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Old 15th December 2004, 06:26 PM   #4
Nicke is offline Nicke  Sweden
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Default Poweramp with mant opamps

Quote:
Originally posted by Mr. Triatic
by the way... there was a guy who buildt a poweramplifier using an unholy amount of small opamps.. just parallelling them into one output.. if i remeber correctly there was 44 pcs per channel!!
-i can't remember his homepage, but i'm sure it's out there...
Could it be this one?



44 pieces of opamp power amp
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Old 16th December 2004, 06:06 AM   #5
jondoe is offline jondoe  Romania
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Default OK, got it

The link is ok from here.

That's the amp.
I allmost fell from my chair when i first saw it.
I'm not that crazy. I just don't have the finances to buy one of those really hi-end opamps hence this idea.
If you really can't see the page, here is a zip of it.
Attached Files
File Type: zip dynamicopamp_e.zip (22.3 KB, 61 views)
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Old 16th December 2004, 01:37 PM   #6
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jondoe!! Pls check the attachment u posted....
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Old 17th December 2004, 04:53 AM   #7
jondoe is offline jondoe  Romania
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Default What's wrong with it ?

Am i missing something here ?
I don't see it containing anything obscene...
neither it mentioning something about what i would want, or is it...

Maybe i'm just sloppy...
Or the file is broken,
WHAT is it ???

Pls, enlighten me.
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