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-   -   Set Up Dual Line Bench Power Supply For Op Amp Testing (http://www.physicsforums.com/showthread.php?t=451375)

MathsDude69 Nov26-10 02:59 PM

Set Up Dual Line Bench Power Supply For Op Amp Testing
 
This is a very silly question. I cant believe I have forgotten. I have a 30v bench power supply and I am looking to test an op-amp running at +/- 15v. I have a supply which has a negative output/ positive output and inbetween a green common/earth output. How do I wire them to produce the +/- 15v rather than just the full 30v?

waht Nov26-10 05:13 PM

Re: Set Up Dual Line Bench Power Supply For Op Amp Testing
 
From your description, you just have single rail +30V power supply. But there is a simple way to power op-amps from a single rail by generating a virtual ground. Consider the circuit:

http://www.swarthmore.edu/NatSci/ech...tualGround.gif

Apply +30V Vcc DC power, and the output of the op-amp will serve as a virtual ground to be used for the rest of your circuit which is now going to be referenced between +15/-15 volts.


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