The op-amps are for signal conditioning (offset/gain) before going into a dsp, so dc application. Another student developed the cards, and I don’t want to go and redesign his work unnecessarily. The stipulate rails for the circuitry is +- 15V, but 12 will work just as well.
Further to my rather short posting, if you change to an LM2576HVT-15 it will give 15V. If you are only powering a couple of op-amps it is a lot more powerful than you need, but you can use that principle with just about any buck regulator.
The op-amps are for signal conditioning (offset/gain) before going into a dsp, so dc application. Another student developed the cards, and I don’t want to go and redesign his work unnecessarily. The stipulate rails for the circuitry is +- 15V, but 12 will work just as well.
Charge pump converters are suitable when low power is required. If +/-12 Volts are fine, you can invert +12 V with an ICL7662 or similar (newer?) ICs. Your input voltage limits the choice of the converter amongst few devices, though.