BridgeClone with current-dumping circlotron afterburner :-)

[Circlotron]

Not unusually big - the efficiency is the same as a normal class AB amp. BTW I have changed the load to a more real-world 2.8 ohm + 2.8 ohms J so the current lags by 45 degrees. This works out to 4 ohms impedance. Resistive loads are just plain wussy for an amplifier to drive.

The curves below are:
Red - output voltage across load.
Green - Power across resistive portion of load.
Blue - dissipation in one mosfet, peak for SOAR, mean for heatsinking.
Black - load current.

DC input power would be 252.4 + 79.17 + 79.16 + opamp power dissiation.

 

[UltimateX86]

Re: Mmmm..... symmetry....

Bridge version.

Hi

It work ?

It is possible to use OPA541/9 for drive MJL3281 ?

thx

 

[Circlotron]

OPA541/9 should be good.

Last couple of replies =very= slow on this thread.

 

[Circlotron]

Well, it's been 6 whole years since I cooked up these circuits and I =still= haven't tried them out. Am I slack or what?

 

[AKSA]

Nah, just creative, distracted, and a father and husband......

Welcome back, mate!

Hugh

 

[godfrey]

Well, it's been 6 whole years since I cooked up these circuits and I =still= haven't tried them out. Am I slack or what?

Yes!!!

OTOH, that was only 3 posts ago..

 

[juma]

... Am I slack or what?

Yes you are. Get on with it !

 

[ttako]

Output waveform either side of load.

Hi,

I also made a model, becouse I was thinking, that the crossover distortion will be quite much.
And here we go. 10 kHz and the xover distortion is huge (between the opamps and the MOSFETs)

i dont know any method to avoid it....

any toughts?

BTW I dont know, how the output graphs were so good from your simulation... Oh yeah at 1 kHz it looks good... Now I know...


cheers,

Tamas

 

[tiefbassuebertr]

For the term "Circlotron" there are more keywords (for the same topology) present: have a look to post #92 about
http://www.diyaudio.com/forums/soli...state-audio-amplifier-components-want-10.html

here more URLs to get a good overview:
http://www.diyaudio.com/forums/soli...e-ended-related-solid-state-output-stage.html (URL collection about post #1, "Circlotron")
http://www.diyaudio.com/forums/pass-labs/55361-supersymmetry-circlotron.html
http://www.diyaudio.com/forums/solid-state/23888-sumo-power-amp.html
http://www.diyaudio.com/forums/soli...-names-commercial-solid-state-amplifiers.html

SUMO NINE
AndAudio.com • ???? - <SUMO>????Circlotron??????? (scoll down for orig. schematic)
SUMO nine - k57117? ??? - ??! ???
SUMO nine (inside pics)