Patent ID: 8160672
Filing Date: 2012-04-17
Classification: A61B,H04B

Abstract:
1. A method for transmitting a signal from a sensor put in a human body to the outside of the human body, the method comprising: generating electric potential difference between transmitting electrodes installed on the surface of the sensor, the sensor capable of being ingested and capable of traveling autonomously within the human body; switching the transmitting electrodes according to information to be transmitted, to create: supplying a conduction current from the first transmitting electrode having the higher electric potential to an inside of the human body to flow a current through a surface of the human body back into the inside of the human body, and sinking the current to the second transmitting electrode having lower electric potential; inducing a voltage between receiving electrodes installed on the surface of the human body by the current flowing through the surface of the human body; and controlling an amount of the conduction current flowing through the body, wherein during the first state, a positive voltage is applied to the first transmitting electrode and the second transmitting electrode is grounded, and wherein during the second state, the first transmitting electrode is grounded and the positive voltage is applied to the second transmitting electrode.