Embodiments of a power switching system are disclosed. In some embodiments, the system includes: a power transistor having a control terminal, a first transistor terminal, and a second transistor terminal; a current buffer that includes a bipolar junction transistor connected across the control terminal and the first transistor terminal, the bipolar junction transistor having a base; a gate driver circuit having a first circuit branch connected to the base of the bipolar junction transistor and a second circuit branch connected to the base of the bipolar junction transistor, wherein: the first circuit branch includes a first switch for opening and closing the first circuit branch; the second circuit branch includes a second switch for opening and closing the second circuit branch and a current source. In some embodiments, the power transistor is a Silicon Carbide field effect transistor or a Gallium Nitride field effect transistor.