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AssigneeNippon Telegraph and Telephone Corporatioan
InventorsTadashi Minotani, Mitsuru Shinagawa
Estimating the term…
A transmitter (2) modulates information to be transmitted with an alternating-current signal having a predetermined frequency and includes a variable reactance section (16) which produces resonance with a stray capacitance (18) between a circuit ground (17) in the transmitter (2) and an earth ground (20) which strays from the earth ground (20) and a stray capacitance (19) between the human body (3) and the earth ground (20). A receiver (1) that receives the induced electric field from the transmitter (2) includes an electrode (12) that transmits/receives the electric field to/from the human body (3); a detection signal source (10) that applies a detection signal to the electrode (12); and a detecting section (9) which detects the detection signal, and further detects, based on an amplitude of the detection signal, a resonant state of the variable reactance section (16) in the transmitter (2) held by the human body (3) close to the electrode (12), the stray capacitance (19) between the human body (3) and the earth ground (20), and the stray capacitance (18) between the ground (17) of the transmitter (2) and the earth ground (20), and outputs a signal when the resonant state is present.
A receiver that receives an induced electric field from a transmitter or a transceiver which modulates information to be transmitted with an alternating-current signal having a predetermined frequency and includes a variable reactance section that produces resonance with a stray capacitance between a circuit ground of the transmitter or the transceiver that strays from an earth ground and the earth ground and an impedance between an electric field transmission medium and the earth ground, in an electric field communication system that induces an electric field based on the information to be transmitted in the electric field transmission medium, and uses the induced electric field to transmit the information and that, on the other hand, receives the electric field induced in the electric field transmission medium based on the information to be received, thereby performing communication, the receiver comprising:
A receiver that receives an induced electric field from a transmitter or a transceiver which modulates information to be transmitted with an alternating-current signal having a predetermined frequency and includes a variable reactance section that produces resonance with a stray capacitance between a circuit ground of the transmitter or the transceiver that strays from an earth ground and the earth ground and an impedance between an electric field transmission medium and the earth ground, in an electric field communication system that induces an electric field based on the information to be transmitted in the electric field transmission medium, and uses the induced electric field to transmit the information and that, on the other hand, receives the electric field induced in the electric field transmission medium based on the information to be received, thereby performing communication, the receiver comprising:
Dependencies are inferred from the claim text.