Portable electronic device having transistor comprising oxide semiconductor

An electronic device comprising:

• a display;
• a first antenna;
• a second antenna;
• a memory;
• and
• a rechargeable battery,
• wherein the first antenna is capable of receiving electric power by electromagnetic induction,
• wherein the rechargeable battery is capable of storing the electric power received by the first antenna,
• wherein the second antenna is capable of receiving data,
• wherein the memory comprises a first transistor, a second transistor and a capacitor,
• wherein a gate of the second transistor is electrically connected to one of a source and a drain of the first transistor and one terminal of the capacitor,
• wherein the first transistor comprises an oxide semiconductor, and
• wherein the second transistor comprises silicon.

An electronic device comprising:

• a display;
• a first antenna;
• a second antenna;
• a memory;
• a rectifier circuit;
• and
• a rechargeable battery,
• wherein the first antenna is electrically connected to the rectifier circuit,
• wherein the rectifier circuit is electrically connected to the rechargeable battery,
• wherein the first antenna is capable of receiving electric power by electromagnetic induction,
• wherein the rechargeable battery is capable of storing the electric power received by the first antenna,
• wherein the second antenna is capable of receiving data,
• wherein the memory comprises a first transistor, a second transistor and a capacitor,
• wherein a gate of the second transistor is electrically connected to one of a source and a drain of the first transistor and one terminal of the capacitor,
• wherein the first transistor comprises an oxide semiconductor, and
• wherein the second transistor comprises silicon.