100W A classe with only 45W idle power dissipation

roender · 9th January 2009, 07:12 PM

Please comment.
I know there is a patent for this type of topologies ...
The no feedback output stage has 2.5A idle current.
The classAB output stage run at 220mA idle current

lineup · 9th January 2009, 07:29 PM

Yes, I have seen this idea.
Even think it was mentioned in forum.
But I can not remember what that power amplifier is called.
There is even a website.

The idea is to have 2 parallel output stages.
One is only used for feedback+correction and the other is the real output stage.

lineup · 9th January 2009, 07:37 PM

Here it is:
The ALTMANN "SPLIF" Amplifier Topology

Website: http://www.altmann.haan.de/splif_page/

Lineup

Dag · 9th January 2009, 07:41 PM

So how does this amp handle back EMF?

EDIT:Sorry, I looked at the The ALTMANN "SPLIF" Amplifier Topology pic. Ignor my comment.....

roender · 9th January 2009, 07:46 PM

Guys,

You make a big mistake ... Take a closer look at the schematic, it is not what you think it is.
The non feedback output stage, the one which run in pure A classe, is supplied from two 12V PSU and it has a floating ground supplied by output stage of the class AB amplifier.

mjf · 9th January 2009, 09:25 PM

hello.
plus-minus 80volt powersupply? is that right seen on the screen?
greetings............

jacco vermeulen · 9th January 2009, 09:48 PM

Technics SE-A1 from the late 70s.
Looks great, especially the choice of parts, still waiting for Glen-K to finish his project.

Nelson Pass · 9th January 2009, 09:55 PM

The circuit was patented by Sano, Hirosha, and Hirota, #4,115,739
in 1977. Personally, I think the concept was a work of art.

stinius · 9th January 2009, 10:29 PM

Quote:

Originally posted by Nelson Pass
The circuit was patented by Sano, Hirosha, and Hirota, #4,115,739
in 1977. Personally, I think the concept was a work of art.

Nelson

I know that you like the circuit, have you built it yet?
I have a copy of the patent; it was first patented in Japan in 1976.

Stinius

Nelson Pass · 9th January 2009, 10:46 PM

Yes I have, and it works as advertised.

It inspired me to patent #5,343,166

9th January 2009, 07:29 PM	#2
lineup diyAudio Member Join Date: Dec 2005 Location: the north	Yes, I have seen this idea. Even think it was mentioned in forum. But I can not remember what that power amplifier is called. There is even a website. The idea is to have 2 parallel output stages. One is only used for feedback+correction and the other is the real output stage. __________________ lineup

9th January 2009, 07:37 PM	#3
lineup diyAudio Member Join Date: Dec 2005 Location: the north	Here it is: The ALTMANN "SPLIF" Amplifier Topology Website: http://www.altmann.haan.de/splif_page/ Lineup __________________ lineup

9th January 2009, 09:48 PM	#7
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Technics SE-A1 from the late 70s. Looks great, especially the choice of parts, still waiting for Glen-K to finish his project. __________________ Looks like Sponge Bob has killed another thread.

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9th January 2009, 07:41 PM	#4
Dag diyAudio Member Join Date: Feb 2005 Location: Goteborg	So how does this amp handle back EMF? EDIT:Sorry, I looked at the The ALTMANN "SPLIF" Amplifier Topology pic. Ignor my comment.....

9th January 2009, 07:46 PM	#5
roender diyAudio Member Join Date: Sep 2006	Guys, You make a big mistake ... Take a closer look at the schematic, it is not what you think it is. The non feedback output stage, the one which run in pure A classe, is supplied from two 12V PSU and it has a floating ground supplied by output stage of the class AB amplifier.

9th January 2009, 09:25 PM	#6
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. plus-minus 80volt powersupply? is that right seen on the screen? greetings............

9th January 2009, 09:55 PM	#8
Nelson Pass The one and only Join Date: Mar 2001	The circuit was patented by Sano, Hirosha, and Hirota, #4,115,739 in 1977. Personally, I think the concept was a work of art.

9th January 2009, 10:46 PM	#10
Nelson Pass The one and only Join Date: Mar 2001	Yes I have, and it works as advertised. It inspired me to patent #5,343,166

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