Semiconductor device and power receiving device
An object is to provide a semiconductor device that is capable of wireless communication, such as an RFID tag, which can transmit and receive individual information without checking remaining capacity of a battery or changing batteries due to deterioration with time in the battery for a drive power supply voltage, and maintain a favorable a transmission/reception state even when electric power of an electromagnetic wave from a reader/writer is not sufficient. The semiconductor device includes a signal processing circuit, a first antenna circuit connected to the signal processing circuit, an antenna circuit group, a rectifier circuit-group and a battery connected to the signal processing circuit. The first antenna circuit transmits and receives a signal for transmitting data stored in the signal processing circuit and drives a power supply circuit, and each antenna circuit of the antenna circuit group receives a signal for charging the battery and includes an antenna which has a different corresponding frequency.
1. A power supply system comprising:
a power feeder including a first antenna circuit;
a power receiving device including a second antenna circuit, a signal processing circuit, a charging circuit, a charging/discharging control circuit, and a power storage portion, and
a piezoelectric sensor,
wherein the second antenna circuit wirelessly receives electric power for charging the power storage portion when the power receiving device is above the piezoelectric sensor.
2. The power supply system according to claim 1 , wherein the power receiving device is a motor vehicle or a bicycle.
3. The power supply system according to claim 1 , wherein the second antenna circuit receives the electric power through an electromagnetic coupling method, an electromagnetic induction method or a microwave method.
4. The power supply system according to claim 1 , wherein the charging circuit is a battery or a capacitor.
5. The power supply system according to claim 4 , wherein the battery is a lithium battery, a nickel metal hydride battery, a nickel cadmium battery, or an organic radical battery.
6. A power supply system comprising:
a power feeder including a first antenna circuit;
a power receiving device including a second antenna circuit, a signal processing circuit, a charging circuit, a charging/discharging control circuit, and a power storage portion; and
a piezoelectric sensor,
wherein the second antenna circuit wirelessly receives electric power for charging the power storage portion when the power receiving device is above the piezoelectric sensor, and
wherein the second antenna circuit is located between the power feeder and the power storage portion.
7. The power supply system according to claim 6 , wherein the power receiving device is a motor vehicle or a bicycle.
8. The power supply system according to claim 6 , wherein the second antenna circuit receives the electric power through an electromagnetic coupling method, an electromagnetic induction method or a microwave method.
9. The power supply system according to claim 6 , wherein the charging circuit is a battery or a capacitor.
10. The power supply system according to claim 9 , wherein the battery is a lithium battery, a nickel metal hydride battery, a nickel cadmium battery, or an organic radical battery.