| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless type information inside a subject acquisition system preventing the saturation of power intensity to be fed via a wireless transmission while avoiding the enlargement of a device introduced into the subject, such as a capsule type endoscope. SOLUTION: The inside of the capsule type endoscope is provided with a receiving resonance circuit 33 for receiving a radio signal, and a voltage converting circuit 26 lowering the voltage of an electric signal obtained by the receiving resonance circuit 33 in receiving. The receiving resonance circuit 33 is provided with a receiving coil 34 and the voltage converting circuit 26 is provided with a power supply coil 36, so that the electric signal with a reduced voltage value is generated in the power supply coil 36 by electromagnetic induction based on a magnetic field formed by the receiving coil 34 in receiving. The saturation of the power intensity is thus prevented by extracting the power using the electric signal. COPYRIGHT: (C)2005,JPO&NCIPI
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