| 摘要 |
PURPOSE: A charge pump for semiconductor device is provided to make the transportation of charge smooth by using PMOS diode, and to achieve efficient pumping by removing the threshold voltage. CONSTITUTION: A power supply part(10) controls the supply of source voltage(Vdd) by a first PMOS(P1). A first charge pumping part(20) consists of a first capacitor(C1) for charge pumping in case that a first clock signal(CLK1) and a second PMOS(P2) to transmit charges to the first capacitor(C1). A second charge pumping part(30) consists of a second capacitor(C2) for charge pumping in case that a second clock signal(CLK2) and a third PMOS(P3) to transmit charges to the second capacitor. A third charge pumping part(40) consists of a third capacitor(C3) for charge pumping in case that the first clock signal(CLK1) and a fourth PMOS(P4) to transmit charges to the third capacitor. A fourth charge pumping part(50) consists of a fourth capacitor(C4) for charge pumping in case that the second clock signal(CLK2) and a fourth PMOS(P4) to transmit charges to the fourth capacitor. A first to a fourth control parts(12,22,32,42) control the operations of the first to the fourth PMOSs(P1,P2,P3,P4) respectively.
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