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Old 2nd April 2008, 12:20 PM   #1
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Default how to use 30 volts DC instead of split power Supply

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
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Old 2nd April 2008, 02:14 PM   #2
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The easiest solution is to use a resistive divider to create a virtual ground at +15V, then use the circuit as-is.

Grey
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Old 2nd April 2008, 06:35 PM   #3
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That will work, but I like to run a capacitor between the virtual
ground and the "-" supply also.
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Old 2nd April 2008, 08:45 PM   #4
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Thanks Mr. Grey and MR.Nelson

perfect it's working
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Old 2nd April 2008, 09:01 PM   #5
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Nelson's idea is good. I'd go one further and put a cap between the + rail and the virtual ground.

Grey
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Old 2nd April 2008, 10:34 PM   #6
flg is offline flg  United States
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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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