Mystery amplifier ... no clue? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 1st September 2008, 02:07 PM   #1
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Question Mystery amplifier ... no clue?

found this circuit
in some audio collection zip stuff i downloaded yesterday

anybody knows this mystery amplifier?

to me it looks not as a complete figure
but probably could be made to work
it looks more like some operational amplifier topology, to me


lineup
Attached Images
File Type: png 080831_mystery_circuit.png (3.9 KB, 364 views)
__________________
lineup
  Reply With Quote
Old 1st September 2008, 02:50 PM   #2
DRC is offline DRC  United Kingdom
diyAudio Member
 
DRC's Avatar
 
Join Date: Jan 2003
Location: UK (south west)
Folded cascode ?
  Reply With Quote
Old 1st September 2008, 03:06 PM   #3
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4


Yes, Uppställning, a fragment of something but a folded cascode.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Tube Buffered Gainclone in work |Thread || Diamond buffer |Thread for the group buy | Wiki
  Reply With Quote
Old 1st September 2008, 03:35 PM   #4
roender is offline roender  Romania
diyAudio Member
 
roender's Avatar
 
Join Date: Sep 2006
CCS loaded folded cascode ... without current mirror (missing part)
  Reply With Quote
Old 6th September 2008, 09:45 AM   #5
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
thanks
I guess you are right .. it looks very familiar to me
... from somewhere
still i am not at all sure what is really this

cant help wondering
who came up with this half finished circuit
without any comments, values or anything
maybe his wife gave him some order to wash some laundry
or go to buy some food for their evening supper
and so he had no choice but to leave it this way ... and then forgot about it


QUESTION 1:
Is it it possible to make something nice & good out of such a setup?

QUESTION 2:
How would you go on and use this input stage?
.... and for what type of amplifier - pre or power?
__________________
lineup
  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
Mystery Tube Amplifier -- Help????? poynton Tubes / Valves 15 10th December 2008 05:41 PM
Bryston needs a clue classd4sure Class D 12 3rd August 2006 06:11 PM
Differential amplifier mystery? klitgt Digital Source 0 7th March 2006 02:07 PM
Mystery Amplifier - check it out lgreen Solid State 16 13th January 2005 02:51 AM
trasformer help (I have no clue) JZatopa Chip Amps 20 13th February 2004 10:29 PM


New To Site? Need Help?

All times are GMT. The time now is 09:07 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