You can read the theory of operation for generating negative voltage in this application note from Analog Devices: https://www.analog.com/en/resources/design-no

You can read the theory of operation for generating negative voltage in this application note from Analog Devices: https://www.analog.com/en/resources/design-notes/generating-negative-output-voltage-from-positive-input-voltage.html https://www.analog.com/en/resources/design-notes/generating-...