Patent ID: 7570102
Filing Date: 2009-08-04
Classification: H02M,H03K

Abstract:
1. A gate driving circuit comprising: an electric power switching element having a gate electrode that receives a gate driving signal; two resistors that divide a principal voltage applied between principal electrodes of the electric power switching element; a diode and a control current source connected in series between a circuit point between the two resistors and the gate electrode of the electric power switching element; a capacitor connected between a circuit point between the diode and the control current source and an emitter electrode of the electric power switching element; and a voltage amplifier that receives a divided voltage signal generated on the circuit point between the two resistors and outputs a control signal for controlling the control current source, wherein the capacitor is charged via the diode according to the divided voltage signal, and an output terminal of the control current source is connected directly to the gate electrode of the electric power switching element.