Which chip and whatever happened to Mueta and UCD? - Page 23

classd4sure · 20th July 2004, 07:32 AM

Hi,

That's true, I've no idea what kind of value Cc would need to be, will try simulating in a day or so but all the same..

Sounds like a nice way to make your speaker up btw.

Regards,
Chris

Bruno Putzeys · 20th July 2004, 07:49 AM

If you want to bridge two UcD's, tie a 47nF cap between the outputs. The amps will synchronise quite nicely.

phase_accurate · 20th July 2004, 08:00 AM

Thanks

Charles

el burto · 20th July 2004, 01:51 PM

Bruno

This topic talks about Mueta and UCD, i think the last one is pretty good when i look to all the posts about it and i will certainly try one in the future when i learned more about all the (for the moment to me still difficult) things about it.
But what happened to SODA?
I made a SODA for myself (based one an existing one), like i said in another topic, and it performed pretty good.
I read about the good output filter correction and everything round this of the UCD.
Has the SODA much other disadvantages then the UCD?

Greetz

Bart

Bruno Putzeys · 20th July 2004, 02:03 PM

In black box terms indeed the main difference lies in how output filter control is handled (first soda: only fb at the switches, 2nd soda composite feedback, ucd only fb after the filter).

Since then, the power stage has become a bit more practical too. It uses only N-fets, and you can turn it on and off at will (this is entirely normal for circuits with IC drivers, but for a number of reasons, mainly cost, driver ICs were not an option).

(for information to the other readers, soda typically used an LM311 comparator, an emitter follower pair as driver, ac coupling with zener DC restoration and a P/N pair. Needless to say startup of this circuit was a bit tricky)

Sonically speaking, soda cooks up a nice sounding "soup". With UcD you get the ingredients

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
head's up= Mueta	kuribo	Class D	7	27th May 2008 12:54 PM
MuEta?	Sandor	Class D	2	20th February 2006 11:25 AM
Mueta classe D	jmartins	Class D	9	24th January 2006 10:08 PM
Mueta - Welcome back	Sheriff	Class D	11	28th September 2005 04:06 PM
Mueta amp, DIY questions	jwagnerhki	Solid State	3	29th October 2003 07:32 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

20th July 2004, 07:32 AM	#221
classd4sure Account Disabled Join Date: Feb 2004	Hi, That's true, I've no idea what kind of value Cc would need to be, will try simulating in a day or so but all the same.. Sounds like a nice way to make your speaker up btw. Regards, Chris

20th July 2004, 07:49 AM	#222
Bruno Putzeys diyAudio Member Join Date: Apr 2004 Location: BE/NL/RW/ZA	If you want to bridge two UcD's, tie a 47nF cap between the outputs. The amps will synchronise quite nicely.

20th July 2004, 08:00 AM	#223
phase_accurate diyAudio Member Join Date: May 2002 Location: Switzerland	Thanks Charles

20th July 2004, 01:51 PM	#224
el burto diyAudio Member Join Date: Jun 2004 Location: ramsel	Bruno This topic talks about Mueta and UCD, i think the last one is pretty good when i look to all the posts about it and i will certainly try one in the future when i learned more about all the (for the moment to me still difficult) things about it. But what happened to SODA? I made a SODA for myself (based one an existing one), like i said in another topic, and it performed pretty good. I read about the good output filter correction and everything round this of the UCD. Has the SODA much other disadvantages then the UCD? Greetz Bart

20th July 2004, 02:03 PM	#225
Bruno Putzeys diyAudio Member Join Date: Apr 2004 Location: BE/NL/RW/ZA	In black box terms indeed the main difference lies in how output filter control is handled (first soda: only fb at the switches, 2nd soda composite feedback, ucd only fb after the filter). Since then, the power stage has become a bit more practical too. It uses only N-fets, and you can turn it on and off at will (this is entirely normal for circuits with IC drivers, but for a number of reasons, mainly cost, driver ICs were not an option). (for information to the other readers, soda typically used an LM311 comparator, an emitter follower pair as driver, ac coupling with zener DC restoration and a P/N pair. Needless to say startup of this circuit was a bit tricky) Sonically speaking, soda cooks up a nice sounding "soup". With UcD you get the ingredients

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)