Power supply apparatus for providing a voltage from an electromagnetic field

• US 9,787,137 B2
• Filed: 02/27/2013
• Issued: 10/10/2017
• 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
• Primary Examiner(s): Tran, Thienvu
• Assistant Examiner(s): Sun, Pinping
• Application Number:
  US13/778,268
• Publication Number:
  US 20130234528A1
• Time in Patent Office: 1,686 Days
• 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 chip card comprising:

an antenna;

a power supply apparatus for providing a voltage from an electromagnetic field, comprising;

a conversion device configured to derive a voltage from a wirelessly received electromagnetic field;

wherein the conversion device is configured to convert an AC voltage to a DC voltage;

a decoupling device coupled to the conversion device and configured to receive a derived voltage from the conversion device; and

wherein the decoupling device comprises a first connection and a second connection;

wherein the first connection and the second connection are configured to receive the derived voltage, and

wherein energy from the first connection and/or the second connection does not influence the power supply apparatus; and

a communication interface;

wherein the antenna is coupled to the communication interface, wherein a first circuit and a second circuit are coupled to the communication interface, wherein the first connection is coupled to the first circuit, wherein the second connection is coupled to the second circuit, and wherein the communication interface circumvents the power supply apparatus.

2. The chip card according to claim 1,

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

3. The chip card according to claim 1,

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

4. The chip card according to claim 1, further comprising:

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

5. The chip card according to claim 4,

the chip-card-internal circuit comprising a microprocessor.

6. The chip card according to claim 1, further comprising:

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

7. The chip card according to claim 6,

the chip-card-external circuit comprising a display.

8. The chip card as claimed in claim 7,

the display being touch-sensitive.

9. The chip card according to claim 6,

the chip-card-external circuit comprising an actuator.

10. The chip card according to claim 9,

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

11. The chip card according to claim 1, further comprising a chip-card-internal circuit being coupled to the first connection, a chip-card-external circuit being coupled to the second connection, and wherein the chip-card-external circuit and the chip-card-internal circuit are configured to communicate with a reading apparatus by means of the communication interface.

12. The chip card according to claim 11,

the reading apparatus comprising a mobile radio device.

13. The chip card according to claim 11,

the reading apparatus comprising a payment terminal.

14. The chip card according to claim 1, wherein the first circuit and the second circuit are configured for bidirectional communication with the antenna.