Patent ID: 6809953
Filing Date: 2004-10-26
Classification: H02M

Abstract:
A potential generating circuit comprising:a first capacitor; a second capacitor which is a ferroelectric capacitor connected in series to the first capacitor; an output terminal; a third capacitor for grounding the output terminal; a first switch for connecting a connecting node between the first capacitor and the second capacitor to the output terminal; and a second switch for connecting the connecting node to the ground; wherein during a first period, with the first switch and the second switch placed in the OFF state, a first terminal of the first capacitor opposed to the connecting node is provided with a positive potential and a second terminal of the second capacitor opposed to the connecting node is grounded; wherein during a second period following the first period, the first terminal is grounded and the first switch is placed in the ON state; wherein during a third period following the second period, the first switch is placed in the OFF state, the second switch is placed in the ON state, and the second terminal is provided with a positive potential; wherein during a fourth period following the third period, the second terminal is grounded; and wherein the first through fourth periods are repeated.