Patent ID: 7272729

Claim:
A data carrier with an integrated circuit, wherein a first signal processing circuit with a signal-independent power supply is provided, and wherein a second signal processing circuit with a signal-dependent power supply is provided, and wherein the first signal processing circuit is designed to receive and process a signal stream in accordance with a first transmission protocol, and wherein the second signal processing circuit is designed to receive and process a signal stream in accordance with a second transmission protocol, which signal stream in accordance with the second transmission protocol comprises a signal characteristic, and wherein a first power source is provided to supply the first signal processing circuit with power, and wherein a second power source is provided to supply the second signal processing circuit with power, and wherein detection means are provided, which detection means are designed for detecting the signal characteristic in the signal stream in accordance with the second transmission protocol, and are also designed for initiating the supplying of at least one part of the second signal processing circuit with power from the second power source following a recognition of the occurrence of the signal characteristic.