Power supply apparatus for providing a voltage from an electromagnetic field

• US 20130234528A1
• Filed: 02/27/2013
• Published: 09/12/2013
• Est. Priority Date: 03/09/2012
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Kargl, Walter, Koroschetz, Helmut, Missoni, Albert
• Granted Patent: US 9,787,137 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices

Abstract

Different exemplary embodiments provide a power supply apparatus for providing a voltage from an electromagnetic field, which apparatus has a conversion device which is set up to derive a voltage from a wirelessly received electromagnetic field, and a decoupling device which is coupled to the conversion device and has a first connection and a second connection, at each of which a supply voltage is provided, the decoupling device suppressing an effect of the circuits coupled to the first and second connections on the power supply apparatus.

Claims

1. A power supply apparatus for providing a voltage from an electromagnetic field, comprising:

a conversion device which is set up to derive a voltage from a wirelessly received electromagnetic field;

a decoupling device which is coupled to the conversion device and comprises a first connection and a second connection, at each of which a supply voltage is provided,

the decoupling device suppressing an effect of the circuits coupled to the first and second connections on the power supply apparatus.

2. The power supply apparatus according to claim 1, further comprising:

a receiving apparatus which is set up to couple to an electromagnetic field.

3. The power supply apparatus according to claim 2,

the receiving apparatus also being set up to provide data communication.

4. The power supply apparatus according to claim 1,

the electromagnetic field being a wireless communication field.

5. The power supply apparatus according to claim 1,

the conversion device comprising a rectifier.

6. The power supply apparatus according to claim 1,

the decoupling device comprising a DC source which is operated in saturation.

7. The power supply apparatus according to claim 1,

the decoupling device being set up to respectively provide a constant and load-independent voltage and/or a constant and load-independent current at the first connection and/or at the second connection.

8. A chip card comprising a power supply apparatus for providing a voltage from an electromagnetic field, comprising:

a conversion device which is set up to derive a voltage from a wirelessly received electromagnetic field;

a decoupling device which is coupled to the conversion device and comprises a first connection and a second connection, at each of which a supply voltage is provided,

the decoupling device suppressing an effect of the circuits coupled to the first and second connections on the power supply apparatus.

9. The chip card according to claim 8,

the chip card being set up as a contactless chip card.

10. The chip card according to claim 8,

the receiving apparatus being set up as a chip card antenna.

11. The chip card according to claim 8, further comprising:

a chip-card-internal circuit being coupled to the first connection.

12. The chip card according to claim 11,

the chip-card-internal circuit comprising a microprocessor.

13. The chip card according to claim 8, further comprising:

a chip-card-external circuit being coupled to the second connection.

14. The chip card according to claim 8, further comprising:

a communication interface which is coupled to the chip card antenna.

15. The chip card according to claim 14,

the chip-card-external circuit and the chip-card-internal circuit being set up to communicate with a reading apparatus by means of the communication interface.

16. The chip card according to claim 13,

the chip-card-external circuit comprising a display.

17. The chip card as claimed in claim 16,

the display being touch-sensitive.

18. The chip card according to claim 15,

the reading apparatus comprising a mobile radio device.

19. The chip card according to claim 15,

the reading apparatus comprising a payment terminal.

20. The chip card according to claim 13,

the chip-card-external circuit comprising an actuator.

21. The chip card according to claim 20,

the electrical actuator comprising an electric motor which is set up to control a state of a lock.