Patent ID: 8143939

Claim:
A charge pump driving circuit for generating a driving pulse signal to drive a charge pump circuit, comprising: a control signal generator for generating a first control signal, a second control signal, and a third control signal, wherein the third control signal transits in the first place, the first control signal transits next, and the second control signal transits last; and a driving signal generator, coupled to the control signal generator, wherein the driving signal generator is controlled by the first control signal, the second control signal and the third control signal, for generating the driving pulse signal, and the driving signal generator has a rare short circuit current flowing from a supply terminal providing a supply voltage to a ground terminal providing a ground voltage, wherein the driving signal generator comprises: a first transistor having: a source electrically connected to the supply voltage; and a gate receiving the first control signal; a bias transistor having: a source electrically connected to the first transistor; and a gate receiving a bias voltage; a second transistor having: a drain electrically connected to the bias transistor; and a gate receiving the second control signal; a fourth transistor having: a source electrically connected to the supply voltage; and a gate electrically connected to the source of the bias transistor; and a third transistor having: a drain, electrically connected to the fourth transistor, for outputting the driving pulse signal; and a gate receiving the third control signal, wherein the first transistor and the second transistor are conductive at different time interval, and the third transistor and the fourth transistor are conductive at different time interval.