DEVICE TO BE INTRODUCED INTO SUBJECT AND SYSTEM TO BE INTRODUCED INTO SUBJECT

摘要

A device to be introduced into a subject, used in a state where the device is inside the subject and performing a predetermined function inside the subject. The device has an imaging circuit (27), a battery (40) for supplying energy used to drive the imaging circuit (27), a power switch (33) for switching the energy supply from the battery (40) to the imaging circuit (27), a switch control circuit (32) for performing switching control of the power switch (33), and a signal detection circuit (31) for detecting a magnet and sending a control signal for causing, depending on the conditions of the detection, the switching control of the power switch (33) to perform toggle operation. The main power source can be arbitrarily turned on and off even before the device is introduced into the subject, so that electric power can be saved with an influence to battery life suppressed and unnecessary radio wave radiation can be suppressed.