 ## 2 quadrants Power Supply Reversible in Current

The 2 quadrants power supply combines a power supply to generate the current, so the voltage and the current are positive. In the quadrant IV, it’s an electronic charge for, on the contrary, sinking the current. So the voltage is positive and the current negative.  ## 2 quadrants Power Supply Reversible in Voltage

The 2 quadrants power supply combines a power supply to generate a current, so the voltage and the current are positive. In the quadrant II, the current remains positive and the voltage becomes negative, the charge is then inductive.  ## 2 quadrants Power Supply Reversal of Polarity

In that case, the 2 quadrants power supply combines a power supply to generate a positive voltage and current. In the quadrant III, the current and the voltage are reversed.  ## What is a 4 Quadrants Power Supply?

The 4 quadrants power supply is a current which allows to generate or sinking current regardless of the voltage, positive or negative.