Can i paralel the 2 opamps in 5532?

jondoe · 15th December 2004, 07:12 AM

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 ?

Mr. Triatic · 15th December 2004, 06:17 PM

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..

Mr. Triatic · 15th December 2004, 07:08 PM

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...

Nicke · 15th December 2004, 07:26 PM

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

jondoe · 16th December 2004, 07:06 AM

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.

sivan_and · 16th December 2004, 02:37 PM

jondoe!! Pls check the attachment u posted....

jondoe · 17th December 2004, 05:53 AM

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.

15th December 2004, 07:12 AM	#1
jondoe diyAudio Member Join Date: Oct 2004	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 ?

15th December 2004, 06:17 PM	#2
Mr. Triatic diyAudio Member Join Date: Feb 2002 Location: SWE EU	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.. __________________ www.joddla.net/audio/

15th December 2004, 07:08 PM	#3
Mr. Triatic diyAudio Member Join Date: Feb 2002 Location: SWE EU	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... __________________ www.joddla.net/audio/

16th December 2004, 02:37 PM	#6
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	jondoe!! Pls check the attachment u posted.... __________________ SivanandBalan

17th December 2004, 05:53 AM	#7
jondoe diyAudio Member Join Date: Oct 2004	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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