A drive circuit drives a switch element having a first terminal, a second
terminal, and a control terminal. A direct-current voltage is applied to
the first terminal. The drive circuit includes a capacitor which is
charged when the switch element is in the OFF state, and applies a
charged voltage between the control terminal and the first terminal of
the switch element or between the control terminal and the second
terminal of the switch element when the switch element is in the ON
state.