Patent ID: 8494446
Filing Date: 2013-07-23
Classification: G06K,H04B,H04W

Abstract:
1. A transmission circuit comprising: a data signal source for emitting data signals; a carrier signal generator for generating a carrier signal, the carrier signal being subjected, in a transmitting mode, 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 take account of the data signal, a modulation circuit for generating the modulated carrier signal by modulating the carrier signal as a function of the modulation-control signals, the modulated carrier signal having unmodulated carrier signal sections and modulated carrier signal sections wherein the modulation circuit contains a circuit stage, the circuit stage being designed to produce a resistance value that acts on the signal output and can be transformed by a signal processing circuit, and a signal output for emitting the modulated carrier signal, the signal output being intended to supply the signal processing circuit, wherein the modulation-control circuit is designed to generate different modulation control signals, and the circuit stage is designed to be 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 being assigned to the resistance value concerned being fed to the circuit stage.