The simplistic Salas low voltage shunt regulator - Page 445 - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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
Reply
 
Thread Tools Search this Thread
Old 13th October 2011, 10:44 AM   #4441
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I wanna do the test analog vs analog but still I don't have the 2x18V tx to do the test, anyway I do the test digital vs digital, I mind good to know.
  Reply With Quote
Old 13th October 2011, 10:52 AM   #4442
diyAudio Member
 
nicoch58's Avatar
 
Join Date: Oct 2004
we must start call Papa Salas
__________________
Sic58
  Reply With Quote
Old 13th October 2011, 10:54 AM   #4443
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by nicoch46 View Post
we must start call Papa Salas
+1
  Reply With Quote
Old 13th October 2011, 11:08 AM   #4444
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Cut it out.
  Reply With Quote
Old 13th October 2011, 12:41 PM   #4445
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
I read that it could be a good idea to use a series reg before the shunt, to act as prereg so both can compensate and work better in the high frequencies.... Any comments about this compensation ?
__________________
RC
  Reply With Quote
Old 13th October 2011, 01:44 PM   #4446
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
I would expect that attenuation of mains and harmonics and of spike interference would allow the shunt to perform better.

But how good are pre-regs at attenuating HF?
Can a 317 attenuate anything shorter than a few us pulse length?
__________________
regards Andrew T.
  Reply With Quote
Old 13th October 2011, 08:05 PM   #4447
diyAudio Member
 
stormsonic's Avatar
 
Join Date: Aug 2008
@AndrewT

are you familiar with http://www.waltjung.org/PDFs/Sources...visit_0409.pdf?

How much PSRR is needed/wanted?
  Reply With Quote
Old 13th October 2011, 08:25 PM   #4448
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Yes, I have worked through all of Walt's site.

You have linked to his paper on CCS, not his papers on voltage regulators, which include pre-reg.
__________________
regards Andrew T.
  Reply With Quote
Old 13th October 2011, 09:15 PM   #4449
diyAudio Member
 
stormsonic's Avatar
 
Join Date: Aug 2008
Yes.
Even simple cascode as CCS part will give you over 120 db of line rejection over whole audio band. Even more line rejection at lower frequencies.

If this is not enough, how much PSRR is needed/wanted? Is pre-reg really necessary?
  Reply With Quote
Old 13th October 2011, 09:24 PM   #4450
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Quote:
Originally Posted by stormsonic View Post
how much PSRR is needed/wanted? Is pre-reg really necessary?
I do not think so but another menber is considering building a psu for a class D Amp and as he never experienced the benefits of these shunts, posted the possibility to use a prereg before the shunt ... that is why I started the discussion.
__________________
RC
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 03:14 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2