Patent ID: 8130028

Claim:
A complementary metal-oxide semiconductor (CMOS) charge pump comprising a main pump, wherein the main pump comprises: a boosting circuit configured to boost voltages at first and second boost nodes in response to a main pumping signal and an inverted main pumping signal; an output unit configured to output a boosted voltage, and comprising a first transfer PMOS transistor that applies the voltage at the first boost node to an output node in response to a voltage level of the second boost node and a second transfer PMOS transistor that applies the voltage at the second boost node to the output node in response to a voltage level of the first boost node; a bulk voltage adjustor configured to electrically connect a bulk node connected to bulks of the first and second transfer PMOS transistors to the output node in response to the voltage levels of the first boost node and the second boost node when a blocking control signal is deactivated, and to disconnect the first boost node and the second boost node from the bulk node when the blocking control signal is activated, a first level sensor configured to sense a voltage level of the boosted voltage and output a clock enable signal; a clock signal generator configured to generate and output a clock signal in response to the clock enable signal; a first AND gate configured to perform an AND operation on an inverted initialization signal and the clock signal and output the main pumping signal.