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I need some circuit help.. I am trying to boost my voltage from a 5v source to a 10v output so I want a Gain of 2. I Ran the simulation and built the circuit exactly how it is shown in the figure below. I am using an op-amp 471CN and when I test the circuits output (Vout) I still only get a 5 volt output. I'm fairly new at this so can anyone help me with trying to figure out why i'm not getting 10 volt output. I'm sure it's simple but I just don't see it now. Thank you for your time.

schematic

simulate this circuit – Schematic created using CircuitLab

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  • \$\begingroup\$ A better alternative to still run it on 5V would be a voltage doubler or Boost. \$\endgroup\$ – Dallas Carter Jun 19 '15 at 19:07
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    \$\begingroup\$ You haven't shown in your circuit what you used to power your opamp. It can't produce more than you supply it with (much less in the case of a 741). \$\endgroup\$ – brhans Jun 19 '15 at 19:12
  • \$\begingroup\$ Why do you want to do this? Is the 5 volts a signal of some sort that you want to feed to an input that expects 10 volts, or do you need the 10 volts as a power supply for your circuit? Note that most op-amps can only deliver low currents, and, as others say, cannot produce an output voltage that exceeds their own power supply voltage. \$\endgroup\$ – Peter Bennett Jun 19 '15 at 19:40
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You will need to supply the op amp with a voltage high enough to contain both the output and any headroom the op amp needs to operate in, so that would mean a supply of at least 11.5V or so.

If you do not have a supply high enough then you will need to use a boost regulator, charge pump, or voltage multiplier to increase the voltage instead.

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