Data carrier designed for contactless communication and having detection means for detecting a temperature prevailing in the data carrier

• US 6,671,493 B2
• Filed: 07/12/2002
• Issued: 12/30/2003
• Est. Priority Date: 11/20/2000
• Status: Expired due to Term

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Thueringer, Peter, Preishuber-Pfluegl, Josef, Cernusca, Michael, Posch, Stefan
• Primary Examiner(s): MAUNG, NAY AUNG
• Application Number:
  US10/181,082
• Publication Number:
  US 20030003870A1
• Time in Patent Office: 536 Days
• Field of Search: 455/41, 455/73, 455/106, 342/44-51, 235/382
• US Class Current: 455/41.2
• CPC Class Codes: G06K 19/0701 at least one of the integrated circuit chips comprising an arrangement for power management
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/0726 the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier
• CPC Class Codes: G06K 19/0773 the record carrier comprising means to protect itself against external heat sources

Abstract

A data carrier (1) for contactless communication with a communication station (2) has an integrated circuit (7) and has a direct voltage generation circuit (20), and has detection means (28) for detecting a temperature prevailing in the data carrier (1) and in the integrated circuit (7), with the aid of which detection means (28) a representation signal (RS) representative of the prevailing temperature can be generated, which representation signal causes an initiation of a change of the temperature in the data carrier (1) and in the integrated circuit (7).

Claims

1. A data carrier (1)

adapted to provide contactless communication with a communication station (2) and

including an integrated circuit (7) and

including a direct voltage generation circuit (20), which serves to generate and to supply a d.c. supply voltage (V) for the data carrier (1), and

including detection means (28) for detecting the temperature prevailing in the environment of the detection means (28) in the data carrier (1), with the aid of which detection means a representation signal (RS) representative of the prevailing temperature can be generated, and

including initiation means (23;

32;

54) adapted to receive and to process the representation signal and adapted to initiate a change of the temperature in the data carrier (1).

2. A data carrier (1) as claimed in claim 1, in which the initiation means (23;

32;

54) are adapted to initiate a reduction of the temperature in the data carrier (1).

3. A data carrier (1) as claimed in claim 1,

in which an input circuit (24) having an input resistance has been provided, and

in which the initiation means (23;

32) are adapted to initiate a change of the input resistance of the input circuit (24).

4. A data carrier (1) as claimed in claim 1,

in which a transmission resonant circuit (11) for receiving a communication signal (AMCS) transmitted from the communication station (2) to the data carrier (1) has been provided, which circuit is tuned to a resonant frequency, and

in which the initiation means (32) are adapted to initiate a change of the resonant frequency of the transmission resonant circuit (11).

5. A data carrier (1) as claimed in claim 1, in which the initiation means (54) are adapted to support the transmission of a transmission signal (DW) corresponding to the representation signal (RS) from the data carrier (1) to the communication station (2).

6. A communication station (2) for the contactless communication with a data carrier (1) having detection means for generating a representation signal (RS) representative of a temperature prevailing in the data carrier (1) and having initiation means (54) for supporting the transmission of a transmission signal (DW) corresponding to the representation signal (RS) from the data carrier (I) to the communication station (2),

in which station processing means (55) for processing the received transmission signal (DW) have been provided, and

in which control means (59) which can be influenced by the station processing means (55) have been provided, with the aid of which control means the energy content of a communication signal (AMCS) transmitted from the communication station (2) to the data carrier (1) can be changed.

7. An integrated circuit (7) for a data carrier (1) for providing contactless communication with a communication station (2),

including a direct voltage generation circuit (20), which serves to generate and to supply a d.c. supply voltage (V) for the integrated circuit (7), and

including detection means (28) for detecting the temperature prevailing in the environment of the detection means (28) in the integrated circuit (7), with the aid of which detection means a representation signal (RS) representative of the prevailing temperature can be generated, and

including initiation means (23;

32;

54) adapted to receive and to process the representation signal and adapted to initiate a change of the temperature in the integrated circuit (7).

8. An integrated circuit (7) as claimed in claim 7, in which the initiation means (23;

32;

54) are adapted to initiate a reduction of the temperature in the integrated circuit (7).

9. An integrated circuit (7) as claimed in claim 7,

in which an input circuit (24) having an input resistance has been provided, and

in which the initiation means (23;

32) are adapted to initiate a change of the input resistance of the input circuit (24).

10. An integrated circuit (7) as claimed in claim 7,

in which a main component (10) for a transmission resonant circuit (11) for receiving a communication signal (AMCS) transmitted from the communication station (2) to the data carrier (1) has been provided, and

in which the main component (10) has a value which also determines the resonant frequency of the transmission resonant circuit (11), and

in which the initiation means (32) are adapted to connect or disconnect at least one additional component (40, 41, 42;

46, 47, 48) for the transmission resonant circuit (11) to the main component (10) for the transmission resonant circuit (11).

11. An integrated circuit (7) as claimed in claim 7, in which the initiation means (54) are adapted to support the transmission of a transmission signal (DW) corresponding to the representation signal (RS) from the integrated circuit (7) to the communication station (2).