I have a
LM471 op-amp and a single DC 5V source. Is it possible to double the source voltage using this op-amp? Can the op-amp be powered by the very signal to be amplified? I tried simulating such situation in Multisim and it seems power/signal have to be from different sources. Why is that?
A segment on my 7 segment display requires voltage higher than 5V. I want to boost my 5V power (double it, for example) and use the boosted voltage to lit the display. I don't want to use a separate power source just to power the op-amp. I understand the out current will be lower, but it doesn't matter in my situation.
Of course different elements might be necessary in this circuit, but I don't want to use things like 555 timers, just analog parts.