Patent ID: 7554367

Claim:
A driving circuit, comprising: a current source, providing a reference current; a plurality of current mirrors, coupled to the current source to generate a first charge current and a second charge current in response to the reference current; a switch circuit, coupled to a supply voltage and a ground to generate a driving signal in response to an input signal, in which the level of the driving signal corresponds to the level of the input signal; a driving switch, coupled between the first charge current and the switch circuit, wherein the switch circuit generates the driving signal, the level of the driving signal being in high level, in response to the first charge current and the second current when the driving switch is turned on and the level of the input signal is in high level; and a detection circuit, coupled to the switch circuit and the driving switch, in which the detection circuit generates a control signal to turn on/off the driving switch, wherein the detection circuit turns off the driving switch to disable the first charge current after a period of time when the level of the driving signal is in high level.