Patent ID: 8704609

Claim:
An electronic circuit, comprising: a first substrate having a first coil that is formed by a wire and transmits a signal and a first transmission circuit that is connected to the first coil and asynchronously outputs the signal to the first coil, said first transmission circuit changes a current that is to be made to flow to said first coil each time a logical value of transmission data changes; a second substrate having a second coil that is formed by a wire at a position corresponding to said first coil and forms a communication channel with said first coil to receive the signal and a third coil that is connected to said second coil by a wire on the substrate and transmits the signal: and a third substrate having a fourth coil that is formed by a wire at a position corresponding to said third coil and forms a communication channel with said third coil to receive the signal and a first reception circuit that is connected to the fourth coil and asynchronously receives the signal from the fourth coil.