I am designing a scaling op-amp circuit that requires approximately 500 mA of -10V power (-12V would be better so I don't have to rely exactly on a rail-to-rail op-amp). The circuit is scaling multiple -10V to 10V inputs by 0.10 (output = -1V to 1V).
However, the only power inputs I have available are +12V and +24V (5A and 10A, respectively). Is there a straightforward way to generate the required negative voltage rail? This is not as obvious as I had hoped, especially at the required power (I need to do this across 5 inputs, so all told worst-case is 500 mA).