Abstract: An electronic circuit (12, 12?) for a reader device (10, 10?) for contactless communication with a transponder (20) is disclosed. The electronic circuit (12, 12?) comprises a connection (13a, 13b) to an antenna (11) of said reader device (10, 10?), which antenna (11) is designed for receiving a radio signal (TRS) from said transponder (20). Furthermore, it comprises a receiving module (14), which is connected to the antenna connection (13a, 13b) and arranged for processing an input voltage (VI) from said antenna (11) representing said radio signal (TRS). To provide satisfactory operation of the receiving module (14) and to compensate a bad matching of the antenna circuit to the electronic circuit (12, 12?) and/or bad environmental conditions where the reader device (10, 10?) is operated, the electronic circuit furthermore comprises a control module (15, 15?).

Abstract: An electronic circuit (12, 12?) for a reader device (10, 10?) for contactless communication with a transponder (20) is disclosed. The electronic circuit (12, 12?) comprises a connection (13a, 13b) to an antenna (11) of said reader device (10, 10?), which antenna (11) is designed for receiving a radio signal (TRS) from said transponder (20). Furthermore, it comprises a receiving module (14), which is connected to the antenna connection (13a, 13b) and arranged for processing an input voltage (VI) from said antenna (11) representing said radio signal (TRS). To provide satisfactory operation of the receiving module (14) and to compensate a bad matching of the antenna circuit to the electronic circuit (12, 12?) and/or bad environmental conditions where the reader device (10, 10?) is operated, the electronic circuit furthermore comprises a control module (15, 15?).

Abstract: In a data carrier (1) and in an integrated circuit (5), a first signal processing circuit (8) with a signal-independent power supply is provided for processing a signal stream (SF1) in accordance with a first transmission protocol, and a second signal processing circuit (9) with a signal-dependent power supply is provided for processing a signal stream (SF2) in accordance with a second transmission protocol, which signal stream (SF2) in accordance with the second transmission protocol comprises a signal characteristic, namely a lead signal (VLS), and a detection circuit (25) is provided, which detection circuit is designed for detecting the lead signal (VLS) and ensuring the supplying of the second signal processing circuit (9) with power from a power source (14) provided for the second signal processing circuit (9) following a recognition of the occurrence of the lead signal (VLS).

Abstract: In a data carrier (1) and in an integrated circuit (5), a first signal processing circuit (8) with a signal-independent power supply is provided for processing a signal stream (SF1) in accordance with a first transmission protocol, and a second signal processing circuit (9) with a signal-dependent power supply is provided for processing a signal stream (SF2) in accordance with a second transmission protocol, which signal stream (SF2) in accordance with the second transmission protocol comprises a signal characteristic, namely a lead signal (VLS), and a detection circuit (25) is provided, which detection circuit is designed for detecting the lead signal (VLS) and ensuring the supplying of the second signal processing circuit (9) with power from a power source (14) provided for the second signal processing circuit (9) following a recognition of the occurrence of the lead signal (VLS).

Abstract: A transponder (1) and an integrated circuit (4) have at least one signal channel (5, 6, 7), each signal channel (5, 6, 7) having at least two signal processing stages (25, 26, 27, 28, 29, 30, 31) and at least one signal processing stage (26, 27, 29) configured such as to be activatable and deactivatable, while an associated bypass branch (32, 33, 34), which is also activatable and deactivatable, is provided for each activatable and deactivatable signal processing stage (26, 27, 29), and a microcomputer (36) and a control register (37) controllable by the microcomputer, (36) are provided, by means of which each activatable and deactivatable signal processing stage (26, 27, 29) and the associated bypass branch (32, 33, 34) are activatable and deactivatable in counterphase.

Abstract: A transponder (1) and an integrated circuit (4) have at least one signal channel (5, 6, 7), each signal channel (5, 6, 7) having at least two signal processing stages (25, 26, 27, 28, 29, 30, 31) and at least one signal processing stage (26, 27, 29) configured such as to be activatable and deactivatable, while an associated bypass branch (32, 33, 34), which is also activatable and deactivatable, is provided for each activatable and deactivatable signal processing stage (26, 27, 29), and a microcomputer (36) and a control register (37) controllable by the microcomputer (36) are provided, by means of which each activatable and deactivatable signal processing stage (26, 27, 29) and the associated bypass branch (32, 33, 34) are activatable and deactivatable in counterphase.