Bootstrapped Op Amp

davidallancole · 13th May 2007, 07:22 AM

Has anybody read this?

http://www.edn.com/contents/images/45890.pdf

It seems like a good idea.

jaycee · 13th May 2007, 08:55 AM

It does indeed.

I'm wondering if this would be good for an opamp-frontend power amp. I might have a play with the idea in LTSPICE

rtarbell · 14th May 2007, 01:05 AM

Great article!

As a side note, for more information on bootstrapping opamps, look on the web for these terms:

suspended supply opamp

I think it's the same or similar concept that was illustred in the article.

Leolabs · 14th May 2007, 02:34 AM

Add a decent current amplifier will produce a good quality power amplifier.

Symon · 14th May 2007, 09:03 AM

This has already be done, by Audio Analogue.

This link contains schematics for a few versions of the Puccini amplifier which is based on boot strapped Op amp.

http://www.pi.infn.it/~federico/unofficial.htm

Nordic · 14th May 2007, 12:12 PM

I am trying to get my head around it...

It has extra voltage swing, at the cost of reduced current output?

So one would need an output stage after it?

13th May 2007, 07:22 AM	#1
davidallancole diyAudio Member Join Date: Nov 2005	Bootstrapped Op Amp Has anybody read this? http://www.edn.com/contents/images/45890.pdf It seems like a good idea.

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13th May 2007, 08:55 AM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	It does indeed. I'm wondering if this would be good for an opamp-frontend power amp. I might have a play with the idea in LTSPICE

14th May 2007, 01:05 AM	#3
rtarbell diyAudio Member Join Date: Sep 2005	Great article! As a side note, for more information on bootstrapping opamps, look on the web for these terms: suspended supply opamp I think it's the same or similar concept that was illustred in the article.

14th May 2007, 02:34 AM	#4
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Add a decent current amplifier will produce a good quality power amplifier.

14th May 2007, 09:03 AM	#5
Symon diyAudio Member Join Date: Mar 2002 Location: Herts, UK	This has already be done, by Audio Analogue. This link contains schematics for a few versions of the Puccini amplifier which is based on boot strapped Op amp. http://www.pi.infn.it/~federico/unofficial.htm

14th May 2007, 12:12 PM	#6
Nordic diyAudio Member Join Date: Sep 2005	I am trying to get my head around it... It has extra voltage swing, at the cost of reduced current output? So one would need an output stage after it?

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