Abstract: A portable device includes an active device (communication station) configuration for contactless communication with at least one external data carrier and a passive device (data carrier) configuration for contactless communication with at least one external communication station. A detection circuit is provided to detect the presence of an external data carrier and/or the presence of an external communication station in a communication zone of the internal active device configuration and/or the internal passive device configuration. An activation circuit is coupled to the detection circuit to enable one of the two configurations based on the detection result.

Abstract: A serial data communication system (10) comprises—a local clock generation device (12) adapted for generating a clock signal (16) with a duty cycle depending on a control signal (18), and—a serial data communication control device (14) adapted for generating the control signal (18) depending on the receipt of a serial data signal and for deriving a transmit and receive clock signal (20, 21) from the clock signal (16) received from the local clock generation device (12).

Abstract: A circuit (3) for a communication device (1), which communication device (1) comprises a transmission coil (2) that is provided for communicating with a further device (1?), comprises a transmitter (4), which transmitter (4) is designed to receive transmission data (TD) and to cooperate with the transmission coil (2) and to release to the transmission coil (2) a transmission data signal (TDS) that represents the transmission data (TD), and further comprises a receiver (5), which receiver is designed to cooperate with the transmission coil (2) and to receive from the transmission coil (2) a reception data signal (RDS) and to provide reception data (RD) that represent the reception data signal (RDS), and further comprises a control stage (7), which control stage (7) is designed to control the transmitter (4) for releasing the transmission data signal (TDS) simultaneous to the receiving of the reception data signal (RDS) by means of the receiver (5).

Abstract: In a method of releasing communication between at least two communication devices (4, 5, 6, 7, 8), a data carrier (36), that is able to be read from in a non-contacting manner and that contains an authorization code (AUC), is brought into the vicinity of communication devices (4, 5, 8) that are to be released, and the authorization code (AUC) is read out in a non-contacting manner by a reading device (21, 22, 25) contained in the relevant communication device (4, 5, 8) and is fed by the reading device (21, 22, 25) to a releasing device (40, 41, 44) that, after analyzing the authorization code (AUC), is responsible for releasing communication between the communication devices (4, 5, 8) to be released.

Abstract: In a circuit (2, 3) for processing at least one output signal (C1, C2, C3) of a communication stage, which at least one output signal (C1, C2, C3) of a communication stage can be generated by means of a communication stage, there are provided signal-mixing means (5), which signal-mixing means (5) are arranged to receive at least two output signals (C1, C2, C3) of communication stages and to mix the at least two output signals (C1, C2, C3) of communication stages and to transmit a collision signal representing the result of the mixing of the at least two output signals (C1, C2, C3) of communication stages, which collision signal represents a simultaneous occurrence of at least two output signals (C1, C2, C3) of communication stages in an electromagnetic field.

Abstract: In a reset circuit (1) comprising a clock signal input (RC) for receiving a clock singal CL MD signal (CL) consisting of a sequence of clock signal cycles, and comprising a data signal input (RD) for receiving digital data signals (MD), which are encoded in such a manner that at least one signal edge (0?1, 1? 0) appears per data bit in the data signal, are provided a counter (2) being connected to the data signal input (RD) and the clock signal input (RC) and being designed for counting the number (X) of clock signal cycles, which appear between a defined number of data signal edges, and comparing means (3), which comparing means (3) being designed for comparing the number (X) of clock signal cycles counted by the counter (2) with a lower limit (MIN) and/or with an upper limit (MAX) and which comparing means (3) being designed to produce a reset signal (RS), if the number (X) either remains below the lower object (MIN) or exceeds the upper limit (MAX), depending on the limit value (MIN, MAX) taken for compari

Abstract: A portable device includes an active device (communication station) configuration for contactless communication with at least one external data carrier and a passive device (data carrier) configuration for contactless communication with at least one external communication station. A detection circuit is provided to detect the presence of an external data carrier and/or the presence of an external communication station in a communication zone of the internal active device configuration and/or the internal passive device configuration. An activation circuit is coupled to the detection circuit to enable one of the two configurations based on the detection result.

Abstract: In a data carrier (2) which is provided as a communication partner appliance for a communication system with at least one further communication partner appliance (3, 40), a first communication mode or a second communication mode can be activated. A detection device (32) for detecting the presence of a received carrier signal (RS) transmits a carrier signal present signal (PS) in the event of a carrier signal (RS) being present, and otherwise a carrier signal not-present signal (NPS). A command signal that can be transmitted with the aid of the carrier signal (RS) triggers a determination stage (27) for determining whether after the end of the command signal has occurred, at a given measurement point in time, the carrier signal present signal (PS) is present. If the carrier signal present signal (PS) is present, the data carrier (2) is brought into the first communication mode with the aid of activators (30, 35); otherwise, it is brought into the second communication mode.

Abstract: A portable device (1) includes a communication station configuration (10) for contactless communication with at least one external data carrier (13) and a data carrier configuration (11) for contactless communication with at least one external communication station (14), wherein a detection circuit (32) is provided which is designed to detect the presence of an external data carrier (13) and the presence of an external communication station (14) in a communication zone of the internal communication station configuration (10) and the internal data carrier configuration (11) designed for contactless communication, and wherein an activation circuit (33) cooperating with the detection circuit (32) is provided, by means of which activation circuit (33) one of the two configurations (10, 11) can be activated as a function of the detection result (INFO1, INFO2, INFO3) supplied in each case by the detection circuit (32).

Abstract: When activating a desired communication mode of an ID communication partner device (2) from a group of possible communication modes, which group comprises at least a TTF mode and an RTF mode, the ID communication partner device (2) and at least one other ID communication partner device (4) are brought into a communication connection, wherein a carrier signal (CS) is output by the at least one other ID communication partner device (4), which carrier signal (CS) is received by the ID communication partner device (2), and wherein the carrier signal (CS) is repeatedly designated by at least one mode activation signal (AS) by means of the at least one other ID communication partner device (4), and wherein the presence of the mode activation signal (AS) is recognized by the ID communication partner device (2), TS giving a recognition result signal (RRS), and wherein, as a function of the recognition result signal (RRS), the desired communication mode of the ID communication partner device (2) is activated.

Abstract: A method of inventorying data carriers (2) by means of a communication station, whereby the communication station and each data carrier (2) are brought into communicative connection, and each data carrier (2) brought into communicative connection with the communication station is capable of generating a response signal (IDS) that renders possible an inventorying of the data carrier and is capable of delivering a generated response signal (IDS) with the use of a transmission start moment that can be selected from a plurality of transmission start moments (t5, t6), each data carrier tests whether another data carrier (2) is already giving its response signal (IDS). Each data carrier (2) subsequently discontinues the generation or delivery of its response signal (IDS) if another data carrier (2) is already providing its response signal (IDS).

Abstract: A portable device (1) comprises a communication station configuration (10) for contactless communication with at least one external data carrier (13) and a data carrier configuration (11) for contactless communication with at least one external communication station (14), wherein a detection circuit (32) is provided which is designed to detect the presence of an external data carrier (13) and the presence of an external communication station (14) in a communication zone of the internal communication station configuration (10) and the internal data carrier configuration (11) designed for contactless communication, and wherein an activation circuit (33) cooperating with the detection circuit (32) is provided, by means of which activation circuit (33) one of the two configurations (10, 11) can be activated as a function of the detection result (INFO1, INFO2, INFO3) supplied in each case by the detection circuit (32).

Abstract: In a method of releasing communication between at least two communication devices (4, 5, 6, 7, 8), a data carrier (36), that is able to be read from in a non-contacting manner and that contains an authorization code (AUC), is brought into the vicinity of communication devices (4, 5, 8) that are to be released, and the authorization code (AUC) is read out in a non-contacting manner by a reading device (21, 22, 25) contained in the relevant communication device (4, 5, 8) and is fed by the reading device (21, 22, 25) to a releasing device (40, 41, 44) that, after analyzing the authorization code (AUC), is responsible for releasing communication between the communication devices (4, 5, 8) to be released.

Abstract: A communication station (1) is suitable for contactless communication with transponders and with other communication stations and comprises a first signal-processing circuit (28) and a second signal-processing circuit (29), the first signal-processing circuit (28) being designed for processing signals using at least one transmission parameter in a communication between the communication station (1) and at least one transponder, and the second signal-processing circuit (29) being designed for processing other signals using at least one other transmission parameter in a communication between the communication station (1) and at least one other communication station, and the transmission parameters used in the two signal-processing circuits (28, 29) differing from each other.

Abstract: A communication station (1) is suitable for contactless communication with transponders and with further communication stations and has a first protocol-executing circuit (12) and a second protocol-executing circuit (13), the first protocol-executing circuit (12) being designed to effect communication between the communication station (1) and transponders under a station/transponder protocol and the second protocol-executing circuit (13) being designed to effect communication between the communication station (1) and further communication stations under a station/station protocol.