Circuit for Compensating Mismatch of Output Current in Charge Pump Circuit and Charge Pump Circuit using the same

摘要

The present invention relates to a charge pump circuit, and is used to correct the discrepancies between the output current. In order to compensate for the charge pump circuit between the output current mismatch, an exemplary charge pump circuit according to an embodiment of the present invention, the first and second input stage, a bias stage, and having an output terminal, and a first and a respectively up to the second input terminal signal, and when a down signal is applied, a capacitor charge and discharge charge pumping unit, and a bias stage and having an output terminal and the current copy unit for copying the current flowing in the output stage the charge pumping unit, the output charge pumped negative voltage connecting to the output terminal It includes the control unit detecting a difference between the current copy output negative voltage for controlling the controlled current value flowing portion biasing, and parts of biasing for controlling the bias voltage applied to the charge pump unit and the current copying unit by the control current .; In the charge pump circuit in accordance with one embodiment of the invention, the output if the current between the mismatch occurs, it becomes a mismatch occurs between the charge pump unit and the current copy output voltage is negative, this discrepancy in the detection and biasing via the control unit by covered by, the current mismatch between the output of the charge pump circuit is compensated for.