Patent ID: 6320456
Filing Date: 2001-11-20
Classification: H02M

Abstract:
A charge pump comprising a supply voltage terminal and a ground terminal for generating at an output terminal an output voltage which is different from the voltage present at the supply voltage terminal, with two complementary MOS field-effect transistors, the source-drain paths of which are connected in series between said supply voltage terminal and said ground terminal, a driving circuit for driving said two MOS field-effect transistors and a charge storage capacitor connected by one terminal to the point connecting said source-drain paths of said two MOS field-effect transistors, wherein said charge storage capacitor is formed by the gate capacitance of a further MOS field-effect transistor (20), the source-drain path of which is connected at one end via a first diode (22) to said supply voltage terminal (16) and at the other end via a second diode (24) to said output terminal (34), and the gate of which is connected to the point connecting the series of the source-drain paths of said two complementary MOS field-effect transistors (12, 14).