This circuit is from the 80's documentation. The integrated circuit is from the time but can be implemented with modern equivalents. The power supply must be symmetrical.
This circuit was found in an application note of the LTC1164 from Linear Technology of the 1990s....
This micropower inverter serves to obtain high voltages with very low current from direct current...
This circuit shows how to get 5 V under low current from an operating amplifier 741. I got this...