CIRCUIT FOR CONTRACTLESS DEVICE HAVING ACTIVE AND PASSIVE SEND MODES

摘要

In a circuit (2) for a communication partner appliance (1) designed for contactless communication having two activatable send modes (ABM, PBM), which send modes (ABM, PBM) differ from one another with regard to their energy requirement, a determination stage (15) is provided, which is designed to determine first energy source information (SI1), which first energy source information (SIl) is characteristic of at least one parameter of at least one energy source (11, 12) serving to supply the circuit with electrical energy, and a decision stage (26) is additionally provided, which is designed to form a decision result taking account of the first energy source information (S I1) determined with the determination stage (15), which decision result influences which send mode (ABM, PBM) is to be activated in the circuit (2) of the communication appliance (1).