Power supply with negative rail

103

02:15:29

This is a solution for power supply where there is a need of a negative rail (suitable for powering op-amps). The negative supply can't give much current, but is sufficient for voltage levels to have the op-amp swing in full voltage range

published 7 years ago

kaivanveldhoven

7 years ago

I wouldn't wanna power my op amps with this :O

GinkoBalboa

7 years ago

You don't have to. I have this circuit in my bench power supply, it has been working for 5 years by now.

GinkoBalboa

7 years ago

Can you tell me why you wouldn't power your op-amps with this?

rich11292000

7 years ago

Because it can't 'half H' http://everycircuit.com/circuit/6215208917270528

GinkoBalboa

7 years ago

Half H? In a DC application it is only needed to swing from 0 to VCC that is your Half H or whatever.

thebugger

7 years ago

Actually ginko is right. Every op amp can work with single rail DC, as long as it's biased correctly. I've actually been using voltage doubling for a while to power up my tube projects. I had a transformer which had insufficient voltage at the output to power my tubes, so I just used a voltage doubler to multiply the voltage. It worked perfectly. Yes it draws twice the current, but since tubes are a high impedance devices, there should be no problem for the doubler to handle such currents

GinkoBalboa

7 years ago

Thanks thebugger for the support

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