Abstract: An example power supply system includes: a loading circuit including power electronics configured to apply DC electrical power to a load; a power supply unit coupled to drive the loading circuit; and a controller. The controller may be configured to at least: generate a voltage control signal and a current control signal to be received as input by the loading circuit, the voltage control signal and current control signal representing voltage and current values to be applied to the load; determine a voltage level to be supplied by the power supply unit to the loading circuit; and provide a power supply voltage control signal to the power supply unit representing the voltage level to be supplied by the power supply unit to the loading circuit. The power supply system may include a circuit for measuring voltage with high precision.