High voltage Opamp with power transistors - 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 30th December 2008, 05:34 AM   #1
diyAudio Member
 
sivan_and's Avatar
 
Join Date: Dec 2004
Location: B'lore/ Calicut India
Send a message via Yahoo to sivan_and
Default High voltage Opamp with power transistors

Hello all..
I have a couple of high voltage opamps like BurrrBrown 3583JM lying around..these r capable of high voltage upto (+) & (-) 140 volts and load currents upto (+) & (-) 75ma..i am thinking of adding some transistor drivres to boost current..the idea is to use as a sub amp with an output of around 200 to 300 watts...any suggestions ?
thx in advance
__________________
SivanandBalan
  Reply With Quote
Old 30th December 2008, 07:06 AM   #2
diyAudio Member
 
sivan_and's Avatar
 
Join Date: Dec 2004
Location: B'lore/ Calicut India
Send a message via Yahoo to sivan_and
http://www.electro-tech-online.com/a...put-opampb.gif
Attached Images
File Type: gif opampb.gif (13.4 KB, 606 views)
__________________
SivanandBalan
  Reply With Quote
Old 30th December 2008, 08:21 AM   #3
jaycee is offline jaycee  United Kingdom
diyAudio Member
 
Join Date: Apr 2004
Location: Norwich, UK
To be honest, by the time you have gone so far as to add the neccesary output stage to an opamp, you may as well have built a fully discrete power amplifier.
  Reply With Quote
Old 30th December 2008, 11:03 AM   #4
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Default come on guys ....

there is similar applications also related with lm 12clk .....

i wonder why they exist in the books ....there is got to be a reason

all these circuits look so simple to construct so if your target is simplicity ,power and average quality i dont see any reason why not ....

i dlike to work on this a bit more

i recall the lm12 application saying 90 volts swing and +- 10 amps ... thats a hell of a lot of power .....

i thing i will have to construct to see what is going on there
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 31st December 2008, 02:31 PM   #5
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Default many people seen

this but no replies ....

its been in the forum before ....i wonder why ???
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 31st December 2008, 02:57 PM   #6
diyAudio Member
 
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
That circuite is not a power amp. It is intended to drive a 2,000ohm load not a loudspeaker. Few people need a line
stage that will swing that kind of voltage.
  Reply With Quote
Old 31st December 2008, 03:23 PM   #7
diyAudio Member
 
Join Date: Aug 2003
Location: Near Rotterdam
Hello,

Many years ago in the French diy magazine LED (now integrated with Electronique Pratique) there used to be a series of articles with such a design for power amplifiers. The high voltage IC directly drove one high voltage transistor or MOSFET (the ‘real’ class A, some say), which was biased by a currents source.
These designs were highly regarded for the way they sounded. On the site of Bonavolt there used to be a copy of such a design, but I did not visit it lately.

Best, Arjen.
  Reply With Quote
Old 31st December 2008, 03:24 PM   #8
diyAudio Member
 
Juergen Knoop's Avatar
 
Join Date: Jan 2007
Blog Entries: 3
LM12 and LF357 are low voltage opamps.
How do their applications apply (LOL!) to the BB type?
Those BBs are expensive. I would sell them.
Regards
  Reply With Quote
Old 31st December 2008, 03:32 PM   #9
diyAudio Member
 
scott wurcer's Avatar
 
Join Date: Jan 2004
Location: cambridge ma
Quote:
Originally posted by sivan_and
http://www.electro-tech-online.com/a...put-opampb.gif
That intermediate stage is full class B I don't think it would be too good for audio. These things are often used to drive electrostatic actuators.
__________________
"The question of who is right and who is wrong has seemed to me always too small to be worth a moment's thought, while the question of what is right and what is wrong has seemed all-important."
  Reply With Quote
Old 31st December 2008, 04:07 PM   #10
diyAudio Member
 
Juergen Knoop's Avatar
 
Join Date: Jan 2007
Blog Entries: 3
Quote:
Originally posted by scott wurcer
These things are often used to drive electrostatic actuators.
exactly what we used the BB for in the past. Then we switched to Apex which was cheaper.
regards
  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
high voltage input opamp sunrise Chip Amps 7 9th April 2007 06:54 PM
high voltage transistors bocka Solid State 2 21st October 2005 07:29 AM
High voltage OPAMP / PREAMP hugeli60 Solid State 7 17th February 2002 08:03 PM
TO-3 transistors and high voltage DC ih Solid State 7 16th January 2002 11:36 AM


New To Site? Need Help?

All times are GMT. The time now is 05:24 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