Charge pump with a very wide output voltage range

The invention relates to a very wide output voltage range constant current to provide or positive or negative charge-pump devices. A symmetry transformation system based on pre-determined thresholds (Vref) or activated and the first op-amp current source (AOP1) or activation and negative current source of second operational amplifier (AOP2). First operational amplifier is used for the output voltage of the device is close to the power supply voltage (VDD) recovery currents are generated when current mirror (M2, M1), while the second operational amplifier is used for the output voltage of the device is close to the ground (GND) when generating negative currents in current mirror (M4, M3). Can make the output current of the device, to maintain a constant and equal to a reference value (Iref).