Patent ID: 7193832

Claim:
A magnetically coupled device comprising: one or more transmitting coils; one or more receiving coils; one or more insulator layers; one or more dummy coils; and one or more logic components; wherein at least one of the transmitting coil or coils and at least one of the receiving coil or coils are mutually magnetically coupled and at least one of the insulator layer or layers intervenes therebetween; input of at least one signal at at least one of the transmitting coil or coils causes output at at least one of the receiving coil or coils of at least one signal produced at least partially by induction due to magnetic coupling therebetween; at least one of the dummy coil or coils is arranged more or less in the vicinity of at least one of the receiving coil or coils; and at least one of the logic component or components determines at least one difference between at least one signal at at least one of the receiving coil or coils and at least one signal at at least one of the dummy coil or coils.