We find this circuit in a 1980s Linear Technology documentation. The circuit can be implemented on the basis of more modern equivalent components.
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...