An electronic device has an operating mode and an energy saving standby mode.
The electronic device includes an input-side antenna element for receiving a signal
carrying information, a receiving unit for processing the basic information carried
on the signal, a voltage supply unit for providing the supply voltage required
for operation, and a switching unit for switching between the operating mode and
the standby mode. First, to minimize the current being drawn in the standby mode,
and second to ensure quick and reliable switching from the energy saving standby
mode to the operating mode as required, it is proposed that the signal carrying
the information includes a number of modulated frequency bands. At least one frequency
band is intended for the basic information to be processed by the receiving unit.
The other frequency band contains wake-up information for actuating the switching unit.
