Single rail opamp

[Neil Bernard]

Hi I want a balanced output using two opamps (for audio) using a single rail
power supply +9v any ideas?

 

[R. Steve Walz]

Neil Bernard wrote:

Hi I want a balanced output using two opamps (for audio) using a single rail
power supply +9v any ideas?
-------------

Artificially split it using a driven "ground" in the middle.

http://www.armory.com/~rstevew/Public/Tutor/OpAmps/virtualground.gif

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public

 

[GSM]

Hi

I have used a TLE2426 for such a purpose. It gives you this ground in the
middle. I had some problems though. The virtual ground wasn't perfect and I
had some (barely visible) crosstalk between two different video signals, and
I think it was due to unstable virtual ground. I guess that you wouldn't
encounter the same problems as audio is slower and you will have the signal
signal feeding both amps. It's worth a try. It's a cheap device.

/Ulf

"R. Steve Walz" <rstevew@armory.com> skrev i meddelandet
news:3FB70156.1385@armory.com...

Neil Bernard wrote:

Hi I want a balanced output using two opamps (for audio) using a single
rail
power supply +9v any ideas?
-------------
Artificially split it using a driven "ground" in the middle.

http://www.armory.com/~rstevew/Public/Tutor/OpAmps/virtualground.gif

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public