Patent ID: 8488347

Claim:
A semiconductor device comprising: a charge circuit comprising: a rectifier circuit; a voltage control circuit; a switch element; and a charge control circuit; a secondary battery electrically connected to the charge circuit; a DC/DC converter electrically connected to the secondary battery; a memory circuit electrically connected to the DC/DC converter; a power supply circuit electrically connected to the DC/DC converter; a logic circuit electrically connected to the DC/DC converter; and an analog circuit electrically connected to the DC/DC converter, wherein the voltage control circuit is electrically connected to the rectifier circuit, wherein the voltage control circuit and the charge control circuit are electrically connected to the secondary battery through the switch element, wherein the secondary battery is configured to supply a first potential to the DC/DC converter, wherein the power supply circuit is configured to supply a second potential to the DC/DC converter, wherein the first potential is used for boosting the second potential, and wherein the second potential is a reference potential of boosting in the DC/DC converter.