Patent ID: 8890605

Claim:
A boosting circuit, comprising: a first switch group which provides a potential difference corresponding to an input voltage between first connection terminals to which a first capacitor is connected; a second switch group which provides the input voltage to one of the first connection terminals connected to the first capacitor provided with the potential difference and then provides a potential of another of the first connection terminals to a second connection terminal to which one end of a second capacitor is connected, the other of the first connection terminals being connected to the other end of the second capacitor and the potential of the other of the first connection terminals being equal to a potential boosted by the potential difference; a third switch group which provides a predetermined potential difference to the one of the first connection terminals connected to the first capacitor provided with the potential difference and then provides a first boosted potential of the other of the first connection terminals to a third connection terminal to which one end of a third capacitor is connected, the first boosted potential being a potential obtained by adding with the predetermined potential difference to the potential difference corresponding to the input voltage between the first connection terminals; and a fourth switch which switches between a first case that the predetermined potential difference is equal to the input voltage and a second case that the predetermined potential difference is equal to twice the input voltage provided to the second capacitor.