To allow a receiver to detect and decode data by allowing a transmitter to transmit not only data but also power to the receiver through the use of capacitive coupling.
In a circuit consisting of an AC voltage source and an inductor 302, Ch is connected to make a part of a serial LC tank circuit. Namely, the inductor 302 is capacitively coupled to a user through an electrode (shown by connection to Ch) and the user puts the receiver generating Cthj on his/her body. A voltage source 300 calculates a reference value with respect to Ch concerning a Q switching or FSK circuit in a state driven by the resonance frequency of a tank circuit and equivalent to zero bit, and the source 300 drives based on a prescribed formula. When the circuit of a receiver is operated so as to change the state to some single bit, the transmitter detects the change of the amplitude or phase of Vc to detect this.
BABAK NIVI
NEAL GERSHENFELD
Next Patent: COMMUNICATION SYSTEM WITH IMPROVING METHOD SOUND QUALITY DETERIORATED IN VOX PROCESSING