how to use 30 volts DC instead of split power Supply

[ali_moinuddin]

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]

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]

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

 

[ali_moinuddin]

Thanks Mr. Grey and MR.Nelson

perfect it's working

 

[GRollins]

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

Grey

 

[flg]

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. 😀