Anatoly Kochetov simple AB

Kuzmenko · 14th January 2006, 08:57 AM

Here it is:
http://files.people.overclockers.ru/...ov_clAB_r1.gif
or:
http://cp.people.overclockers.ru/cgi...ov_clAB_r1.gif

Pay attention, that there is low PSRR, so it needs stabilised supplies. Very good at sim!

edl · 14th January 2006, 09:53 AM

Link not really works, so I attached the schema. hope it helps.

Regards,

Tube_Dude · 14th January 2006, 09:57 AM

I think C2 is not necessary and even bad for the operation of the output stage.

This is a class A SE amp , not a class A/B.

MikeB · 14th January 2006, 10:39 AM

I guess C2 is intended to turn it into a push pull. But simple is not always good...
This might be dangerous, during power up of the amp, C2 is empty and will open both output devices at the same time. Ouch !
Also PSRR is horrible this way. (Oh, Kuzmenko already mentioned)

Mike

djk · 14th January 2006, 08:42 PM

Low voltage zeners have very poor knee characteristics, and the Vgs ot the IRF type FETs is temperatute sensitive.

Result is unstable bias.

14th January 2006, 08:57 AM	#1
Kuzmenko diyAudio Member Join Date: Nov 2004 Location: Zaporozhye	Anatoly Kochetov simple AB Here it is: http://files.people.overclockers.ru/...ov_clAB_r1.gif or: http://cp.people.overclockers.ru/cgi...ov_clAB_r1.gif Pay attention, that there is low PSRR, so it needs stabilised supplies. Very good at sim!

14th January 2006, 09:57 AM	#3
Tube_Dude diyAudio Member Join Date: Mar 2002 Location: Aveiro-Portugal	I think C2 is not necessary and even bad for the operation of the output stage. This is a class A SE amp , not a class A/B. __________________ Jorge

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14th January 2006, 10:39 AM	#4
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	I guess C2 is intended to turn it into a push pull. But simple is not always good... This might be dangerous, during power up of the amp, C2 is empty and will open both output devices at the same time. Ouch ! Also PSRR is horrible this way. (Oh, Kuzmenko already mentioned) Mike

14th January 2006, 08:42 PM	#5
djk diyAudio Member Join Date: Feb 2001 Location: USA	Low voltage zeners have very poor knee characteristics, and the Vgs ot the IRF type FETs is temperatute sensitive. Result is unstable bias.

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