Koninklijke Philips Corporation N.v.

Peter Kompan

Peter Thueringer

Klaus Ully

Stefan Posch

Wolfgang Meindl

Markus Feuser

Andreas Muehlberger

Torsten Kramer

A data carrier ( ) for the transfer of communication data (KD , KD ) via at least two interface means ( ), having first interface means ( ) for receiving a first communication signal (KS ), and having second interface means ( ) for receiving a second communication signal (KS ), and having processing means ( ) to which a first clock signal (TS ) derived from the first communication signal (KS ) or a second clock signal (TS ) derived from the second communication signal (KS ) can be applied for the processing of the transferred communication data (KD , KD ), and having reset means ( ) for resetting the processing by the processing means ( ), now includes a first frequency sensor ( ) which is adapted to supply first frequency reset information (RI ) to the reset means ( ) when a first clock frequency of the first clock signal (TS ) or the frequency (FKS ) of the first communication signal (KS ) lies below a first lower frequency threshold (FU ), and includes a second frequency sensor ( ) which is adapted to supply second frequency reset information (RI ) to the reset means ( ) when a second clock frequency of the second clock signal (TS ) or the frequency (FKS ) of the second communication signal (KS ) lies below a second lower frequency threshold (FU ), the reset means ( ) being adapted to reset the processing by the processing means ( ) when the first clock signal (TS ) is applied to the processing means ( ) and the first frequency reset information (RI ) is received or when the second clock signal (TS ) is applied to the processing means ( ) and the second frequency reset information (RI ) is received.

Frequency sensor for each interface of a data carrier

A data carrier ( ) includes a chip ( ) having a supply voltage circuit point ( ), from which a supply voltage (V) can be taken, and having at least one supply voltage output ( ) for supplying a supply voltage (V , V ), and having potential control means ( ) to which a control signal (S) can be applied and with the aid of which the supply voltage output ( ) can be set to different potential values in accordance with the control signal (S), and also includes at least one component ( ) which is spatially separated from the chip ( ), which component ( ) has a supply voltage input ( ) is connected to the supply voltage output ( ) of the chip ( ) via a connection lead ( ).

Data carrier having a chip including means for the controllable voltage supply to a further component of the data carrier

A data carrier ( ) for the contactless communication of communication information (KD) with a transmitting/receiving station ( ) includes receiving circuit ( ) for receiving an HF signal (HF) containing the communication information (KD) from the transmitting/receiving station ( ), and processing circuit ( ) for processing the received communication information (KD), and supply voltage generating circuit ( ) for rectifying the received HF signal (HF) and for energizing the processing circuit ( ) with a supply voltage (UV), and reset circuit ( ) for resetting, when the supply voltage (UV) decreases below a reset voltage value (UR), the processing performed by the processing circuit ( ), the reset circuit ( ) now being adapted to interrupt the processing of the communication information (KD) by the processing circuit ( ) at least partially when the supply voltage (UV) decreases below an interruption voltage value (UU), the interruption voltage value (UU) being greater than the reset voltage value (UR).

Data carrier having reset means for interrupting the processing

An output stage ( ) of a data carrier ( ), which output stage is connected to a communication contact ( ), said data carrier being adapted to provide contactless communication via an antenna stage ( ) and contact-bound communication via the communication contact ( ), includes a first transistor (T ; T ) having a first control terminal (G ; G ), a first input terminal (S ; D ) and a first output terminal (D ; S ), and a second transistor (T ) having a second control terminal (G ), a second input terminal (D ) and a second output terminal (S ), and a control stage ( ) for supplying first control information (SI ) to the first control terminal (G ), in order to drive the first transistor (T T ) into its conductive state, and for supplying second control information (SI ) to the second control terminal (G ), in order to drive the second transistor (T ) into its conductive state, in which stage an internal supply voltage (VINT), derived from an antenna signal (HF) by a power supply ( ) of the data carrier ( ) during contactless communication, can be supplied to the first input terminal (S ) and a reference potential (GND) can be supplied to the second output terminal (S ), and in which the second input terminal (D ) is connected to the communication contact ( ) of the data carrier ( ). The output stage ( ) now includes inhibit means (R; D; T ), which are adapted to prevent an analysis current (IA) having an analysis current strength from being fed from the communication contact ( ) into the data carrier ( ) via the first transistor (T T ), the analysis current (IA) having the analysis current strength being suited for the analysis of the power consumption of the data carrier ( ) and for hacking communication data (VKD) processed in the data carrier ( ).

Growing community of inventors

Graz, Austria

Peter Kompan