SEMICONDUCTOR DEVICE AND POWER RECEIVING DEVICE
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Abstract
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.
40 Citations
11 Claims
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1. (canceled)
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2. A power supply system comprising:
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a power feeder including a first antenna circuit; and 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, wherein the second antenna circuit wirelessly receives electric power for charging the power storage portion. - View Dependent Claims (3, 4, 5, 6)
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7. A power supply system comprising:
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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. - View Dependent Claims (8, 9, 10, 11)
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Specification