Leaving Class A - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 3rd July 2008, 09:56 PM   #21
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Quote:
Originally posted by Manu
advocate
Chico,

regarde Ca
  Reply With Quote
Old 3rd July 2008, 10:11 PM   #22
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by Vix
........

No, seriously, nice paper. By the way, if we connect more devices parallel, the capacitance also increases, making the output more difficult to drive?

you must count on increased xconductance , with more outputs , so that ratio between No. of devices/difficulty to drive isn't quite linear
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 4th July 2008, 12:36 AM   #23
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
The part that is linear is the Cgd, which is quite a bit smaller than
Cgs. Driving Cgs has the same compensating effect - there's more
Cgs to drive, but it takes less voltage to drive it.
  Reply With Quote
Old 4th July 2008, 10:50 AM   #24
Vix is offline Vix  Yugoslavia
diyAudio Member
 
Vix's Avatar
 
Join Date: Nov 2003
Location: Somewhere on Planet Earth
Thanks!

I got it. More is more
  Reply With Quote
Old 4th July 2008, 05:52 PM   #25
Manu is offline Manu  Europe
diyAudio Member
 
Manu's Avatar
 
Join Date: Nov 2002
Location: Vienna, Ostrich
Quote:
Originally posted by Nelson Pass
The resistor works fine as long as the supply isn't too noisy.
Thanks!
But I need some more help to understand :
What would be exactly the effect of a "noisy" supply?

Quote:
Originally posted by jacco vermeulen


Chico,

regarde Ca
Jacco-the-brain : sincerely admire your memory, amazing...
Thanks for link ... but in defence of my inattention I must say I was not really aware of this question. Usually you don't see what you don't know...

Manu
  Reply With Quote
Old 4th July 2008, 06:04 PM   #26
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Quote:
Originally posted by Manu
But I need some more help to understand :
What would be exactly the effect of a "noisy" supply?
The resistor to the supply conducts not only DC but also AC, so any
noise on the supply is injected into the output.
  Reply With Quote
Old 4th July 2008, 06:06 PM   #27
Manu is offline Manu  Europe
diyAudio Member
 
Manu's Avatar
 
Join Date: Nov 2002
Location: Vienna, Ostrich
Thats very clear now, thank you very much ...

Manu
  Reply With Quote
Old 5th July 2008, 11:00 AM   #28
diyAudio Member
 
Join Date: Apr 2007
Nelson, The increased bias current is shown to be a major improvement by the graphs provided. Is there any correlation that relates to the actual heat of the output devices. Does this heat which is causing the molecular particles to move faster attribute any advantages? I know there is a practical limit here.

Very nice article, makes things much easier to understand. Tad
  Reply With Quote
Old 5th July 2008, 10:37 PM   #29
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
There is a subtle performance difference with devices running a
little hotter, but mostly we make sure that we do all our adjustments
at normal operating temperature, and that means that we often have
to re-adjust after warm-up and burn-in.
  Reply With Quote
Old 28th July 2008, 03:20 AM   #30
kzim229 is offline kzim229  United States
diyAudio Member
 
Join Date: Jul 2008
Location: Southern California
I love this site.
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Reading Leaving Class A . . . Babowana Pass Labs 11 4th October 2009 01:09 AM
Leaving D.I.Y everything must go sale...... exurbia Swap Meet 36 15th October 2008 03:42 AM
bg and suggestions of leaving the amp on jarthel Parts 3 29th June 2007 01:16 AM
Leaving X-former powered up Wynand Power Supplies 4 16th May 2006 01:07 AM
Leaving. fdegrove Everything Else 23 2nd December 2002 08:36 PM


New To Site? Need Help?

All times are GMT. The time now is 09:19 AM.


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