An improved charge pump with high efficiency for low voltage operations

This paper proposes a low-voltage, high performance charge pump circuit suitable for implementation in standard CMOS technologies. With the switching substrate technique and boosted transistor, the influence of body effect is almost eliminated and the voltage gain at each pumping node is greatly increased. So higher output voltage and higher efficiency than the conventional charge pump can be obtained by the proposed charge pump. Simulation results of different supply voltages and stage numbers at 2MHz input clock frequency are shown in this paper.