Is it possible to separate the positive and negative portions of an AC voltage wave into two separate lines, where one line has the positive voltage portion (and is neutral when the source is negative), and another has the negative voltage portion (and is neutral when the source is positive)?

Here's a diagram to try to clear up any misunderstandings:


simulate this circuit – Schematic created using CircuitLab

So if VMI's output looked like this:


VM+ and VM- would look like the following:


If it matters, this is purely hypothetical; I don't plan on trying to build said circuit anytime soon.


I think a Half-Wave Rectifier is what you mean.
enter image description here

  • \$\begingroup\$ I don't think so. Wouldn't both of the AC outputs have the same signal (equivalent to what VM+ should be)? \$\endgroup\$ – user89516 Feb 1 '16 at 6:29
  • \$\begingroup\$ sorry, that's fixed now \$\endgroup\$ – Robherc KV5ROB Feb 1 '16 at 6:38
  • \$\begingroup\$ The two outputs shouldn't be marked AC. They are really unfiltered DC with respect to ground. \$\endgroup\$ – Charles Cowie Feb 1 '16 at 13:17
  • \$\begingroup\$ @CharlesCowie technically, it's still AC (alternates between gnd and +, or between gnd and -). If it helps, place an "AC coupling capacitor" on each output line...the circuit still works, only now the output voltage becomes a 1/2 voltage (and somewhat distorted) copy of the input waveform. The basic premise of pretty much all RF engineering revolves around that property of "pulsed dc"/"unfiltered dc", allowing us to make clean ac waveforms from single-ended DC inputs. \$\endgroup\$ – Robherc KV5ROB Feb 1 '16 at 14:12
  • \$\begingroup\$ Yes, but the asker seemed to be heading in the direction making a dual DC supply. However, the fact that the asker accepted the answer is probably all that matters. \$\endgroup\$ – Charles Cowie Feb 1 '16 at 15:14

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