Patent ID: 7906998

Claim:
A charge pumping circuit having a first mode and a second mode, the first mode being a mode where a control voltage is increased according to a charging control signal received from an external and where the control voltage is decreased according to a discharging control signal received from the external, the second mode being a mode where a correction operation is performed, the charge pumping circuit comprising: a charging pump capacitance for generating the control voltage; a charging unit for outputting a charging current via a first node according to the charging control signal in the first mode so as to charge the charging pump capacitance; a discharging unit for sinking a discharging current via a second node according to the discharging control signal in the first mode so as to discharge the charging pump capacitance; a detection resistor having one terminal and the other terminal, the one terminal being connected between the first node and the second node in the second mode; a voltage source for supplying a reference voltage to the other terminal of the detection resistor; a correction unit for correcting the charging current output from the charging unit and the discharging current that is to be sunk by the discharging unit to equalize the charging current and the discharging current in the second mode, based on a difference between a voltage of the one terminal of the detection resistor and the reference voltage when the charging unit outputs the charging current to the one terminal of the detection resistor and the discharging unit sinks the discharging current from the one terminal of the detection resistor.