virtual ground...help - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 2nd February 2005, 10:55 AM   #1
jsteigs is offline jsteigs  Japan
diyAudio Member
 
Join Date: Oct 2004
Default virtual ground...help

well, how do you make one? i want to know so that i can run a 5532 and similar op amps off a single 9V battery.

steigs
  Reply With Quote
Old 2nd February 2005, 11:50 AM   #2
joensd is offline joensd  Germany
diyAudio Member
 
Join Date: Dec 2001
Location: Germany
Hi,
here´s two possibilities to do it.
http://sound.westhost.com/project43.htm

Something like a BUF634 is another though more expensive solution.
I´ve used it to split rails of a 30V wallwart and it worked out really nice. Besides the BUF634 has only about 1.5mA quiescent current in low-bandwidth-mode which is keeps your batteries happy.
Have a look at the datasheet especially where it says "pseudo-ground driver".

greets
__________________
jens
  Reply With Quote
Old 2nd February 2005, 12:22 PM   #3
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
If you could stretch to 2x9v batteries it would improve the headroom no end, and make the earth easier, just run it from between the two batteries.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 2nd February 2005, 08:05 PM   #4
azira is offline azira  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Near Seattle
It would be simpler and extend your battery life if you used coupling caps.
--
Danny
  Reply With Quote
Old 3rd February 2005, 08:53 AM   #5
jsteigs is offline jsteigs  Japan
diyAudio Member
 
Join Date: Oct 2004
Quote:
Originally posted by pinkmouse
If you could stretch to 2x9v batteries it would improve the headroom no end, and make the earth easier, just run it from between the two batteries.
The point is that I don't want to have to use 2 batteries...

btw, thanks for the ESP website joansd
  Reply With Quote
Old 3rd February 2005, 09:41 AM   #6
diyAudio Member
 
Join Date: May 2002
Location: UK
Plenty of useful info here:


http://tangentsoft.net/elec/vgrounds.html


Setmenu
  Reply With Quote
Old 3rd February 2005, 10:49 AM   #7
diyAudio Member
 
Join Date: Jun 2004
Location: Alpes
Have you considered biasing your opamp schematic?
__________________
Dzharis: raaaaaah lovelyyyy!
  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
virtual ground codacola Parts 6 7th March 2013 01:24 AM
Virtual Ground ? Bernhard Solid State 13 4th March 2009 01:57 PM
Battery PS: Virtual ground or single supply? Dominique Power Supplies 2 5th May 2007 11:34 PM
Connecting Virtual Ground Circuits with True Ground circuits?? Minion Solid State 1 12th February 2007 01:28 AM
Decoupling cap placement - virtual ground dual op amp? Triophile Solid State 1 27th March 2006 06:30 AM


New To Site? Need Help?

All times are GMT. The time now is 09:25 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