Patent ID: 8781395

Claim:
A near field communication partner device for contactless transmission of data having a transmission mode and comprising: a transmission circuit comprising: a data signal source for emitting data signals; a carrier signal generator for generating a carrier signal, the carrier signal in a transmitting mode being subjected to amplitude modulation of a given degree of modulation in accordance with the data signals to be transmitted; a modulation-control circuit for generating modulation-control signals that takes account of the data signal and that is designed to generate different modulation control signals; a modulation circuit having a circuit stage, the modulation circuit generating the modulated carrier signal by modulating the carrier signal as a function of the modulation-control signals, the modulated carrier signal having both unmodulated carrier signal sections and modulated carrier signal sections; and a signal output for emitting the modulated carrier signal, the signal output supplying the signal processing circuit, and the circuit stage is controllable to produce a plurality of different resistance values that act on the signal output and wherein the different modulation-control signals are assigned to the different resistance values, each of the different resistance values is produced as a result of the different modulation-control signals assigned to the respective resistance value being fed to the circuit stage; a signal processing circuit connected to the transmission circuit, the signal processing circuit transforming resistance values; and a transmission coil connected to the signal processing circuit.