Patent ID: 8106703

Claim:
A booster circuit that boosts a first supply voltage to one of a positive prescribed voltage and a negative prescribed voltage, comprising: a first transistor that is connected to a first node; a first capacitive element that has one end connected to the first node, and that is charged with a voltage of the first node when the first transistor is activated; and a first control signal generating circuit that provides a control terminal of the first transistor with a first control signal being in accordance with a first clock signal, wherein when the first transistor is de-activated, the first capacitive element boosts a voltage of the first node to one of a positive first voltage and a negative first voltage by a voltage being applied to other end of the first capacitive element, the voltage applied to the other end being at least ½ as great as the first supply voltage, and the first control signal generating circuit sets a voltage of the first control signal when the first transistor is de-activated to be the first voltage of the first node, and sets a voltage of the first control signal when the first transistor is activated to be a voltage, difference between the voltage and the first voltage being equal to or smaller than a value of the first supply voltage.