CHARGE PUMP CAPABLE OF CONTROLLING TURN-ON TIME OF SHARING TRANSISTOR

摘要

The present invention concerns a charge pump (CP) which is capable of controlling the turn-on time of a sharing transistor. More specifically, the disclosed charge pump sets up a time interval between a control signal controlling a source switch and a control signal controlling movement of a sharing transistor, then turns on the sharing transistor so that it reaches a certain voltage level. Therefore, the reverse current caused after the source switch is turned off is prevented and the dynamic current applied to a roof filter is stably maintained.