Connect Virtual Ground to Real Ground
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amendiola
diyAudio Member

Join Date: Sep 2010
Connect Virtual Ground to Real Ground

Dear All:

I am using a cmoy design amplifier using a voltage divider to create a "virtual ground" (8v/2) = 4v.

Is there a problem if i connect the virtual ground (4v) of the amplifier to a real ground in the analog source?

For example if I connect a jack to my computer headphone output there will be a difference of 4v between the "virtual ground 4v" vs the real ground of my computer jack connector.

I'm confused.

Regard.
Alfredo Mendiola Loyola
Lima, Peru
Attached Images
 rdiv.png (2.6 KB, 71 views)

 17th March 2015, 02:43 PM #2 DF96   diyAudio Member   Join Date: May 2007 Every voltage is the difference in potential between two places. No one place has a voltage. So you need to ask yourself: with respect to what is the virtual ground at 4V? Another question is: what is the voltage at one terminal of a battery?
amendiola
diyAudio Member

Join Date: Sep 2010
Quote:
 Originally Posted by DF96 Every voltage is the difference in potential between two places. No one place has a voltage. So you need to ask yourself: with respect to what is the virtual ground at 4V? Another question is: what is the voltage at one terminal of a battery?
I'm using a 8 volts power supply, but I can replace that power supply by an 8v battery.

+4v (8v with respect to 4v)
-4v (0v with respect to 4v)

Regards.
Alfredo

 17th March 2015, 03:08 PM #4 richie00boy   Did it Himself diyAudio Member     Join Date: Nov 2003 Location: Gloucestershire, England, UK If the 8V supply is floating - like a battery would be - then you can connect the grounds. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.

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