how to use 30 volts DC instead of split power Supply

ali_moinuddin · 2nd April 2008, 01:20 PM

Hi Friends,

I want to use 30Volts DC single ended power supply instead of +15 0 -15 volts which is a split power supply.

I will appreciate if soneone can suggest any kind of modifications needed in this circuit inroder to use with the single ended power power supply.

thanks

GRollins · 2nd April 2008, 03:14 PM

The easiest solution is to use a resistive divider to create a virtual ground at +15V, then use the circuit as-is.

Grey

Nelson Pass · 2nd April 2008, 07:35 PM

That will work, but I like to run a capacitor between the virtual
ground and the "-" supply also.

ali_moinuddin · 2nd April 2008, 09:45 PM

Thanks Mr. Grey and MR.Nelson

perfect it's working

GRollins · 2nd April 2008, 10:01 PM

Nelson's idea is good. I'd go one further and put a cap between the + rail and the virtual ground.

Grey

flg · 2nd April 2008, 11:34 PM

I think you will also need some protection from turn on/off conditions being unfavorable to the input of your Op-amps. I overcome this with something like a 1k right at each input.

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2nd April 2008, 03:14 PM	#2
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	The easiest solution is to use a resistive divider to create a virtual ground at +15V, then use the circuit as-is. Grey

2nd April 2008, 07:35 PM	#3
Nelson Pass The one and only Join Date: Mar 2001	That will work, but I like to run a capacitor between the virtual ground and the "-" supply also.

2nd April 2008, 09:45 PM	#4
ali_moinuddin diyAudio Member Join Date: Jun 2007	Thanks Mr. Grey and MR.Nelson perfect it's working

2nd April 2008, 10:01 PM	#5
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Nelson's idea is good. I'd go one further and put a cap between the + rail and the virtual ground. Grey

2nd April 2008, 11:34 PM	#6
flg diyAudio Member Join Date: Jul 2005 Location: North East	I think you will also need some protection from turn on/off conditions being unfavorable to the input of your Op-amps. I overcome this with something like a 1k right at each input.

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