Data transmission from a user terminal to another apparatus
Embodiments provide a method for transmitting data from a user terminal to another apparatus. The method has a step of generating a signal for driving an electromagnetic actuator of a loudspeaker of the user terminal, and a step of driving the electromagnetic actuator by the generated signal to produce, by the electromagnetic actuator, a magnetic field which carries the data.
1. An apparatus for receiving data which a magnetic field carries, the apparatus comprising:
an LC oscillating circuit configured to detect the magnetic field which carries the data, and
a microcontroller configured to evaluate the detected magnetic field to receive the data,
wherein the LC oscillating circuit is connected directly to an input or inputs of a comparator of the microcontroller.
2. The apparatus as claimed in claim 1 ,
wherein the microcontroller is configured to change, responsive to an interrupt of the comparator, from an operating mode of reduced current consumption to a normal operating mode.
3. The apparatus as claimed in claim 2 ,
wherein the microcontroller is configured to provide the comparator with an offset voltage to increase a signal threshold for triggering the interrupt.
4. The apparatus as claimed in claim 3 ,
wherein the microcontroller is configured to reduce or switch off the offset voltage while receiving the data.
5. The apparatus as claimed in claim 1 ,
wherein the microcontroller is configured to evaluate switching times of the comparator to receive the data.
6. The apparatus as claimed in claim 1 ,
wherein the microcontroller is configured to connect the apparatus to a wireless network based on the received data.
7. System, the system comprising:
an apparatus as claimed in claim 1 , and
a user terminal for transmitting data to the apparatus, the user terminal comprising a loudspeaker comprising an electromagnetic actuator, the user terminal comprising a signal generator, the signal generator being configured to generate a signal for driving the electromagnetic actuator, and to drive the electromagnetic actuator by the generated signal to produce, by the electromagnetic actuator, a magnetic field which carries the data.