Network coupler

• US 6,919,775 B2
• Filed: 05/25/2004
• Issued: 07/19/2005
• Est. Priority Date: 09/14/1999
• Status: Expired due to Term

• Current Assignee: Callahan Cellular LLC (Intellectual Ventures LLC)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Wendt, Matthias, Budde, Wolfgang, Fuhrmann, Peter
• Primary Examiner(s): TAKAOKA, DEAN O
• Application Number:
  US10/853,351
• Publication Number:
  US 20040217826A1
• Time in Patent Office: 420 Days
• Field of Search: 333/118, 333/177, 336/126, 336/182, 336/232, 363/126
• US Class Current: 333/118
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2847 Sheets; Strips H01F27/2866 takes precedence
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/5458 Monitor sensor; Alarm systems
• CPC Class Codes: H04B 2203/547 via DC power distribution
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 3/56 Circuits for coupling, blocking, or by-passing of signals
• CPC Class Codes: H04L 12/10 Current supply arrangements
• CPC Class Codes: H04L 25/0266 Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling

Abstract

For a network coupler for network users in a network comprising at least two lines, a simultaneous data and energy transfer is ensured in that the network coupler is formed in such a way that it is suitable for data transfer via the two lines (1, 2) of the network and for coupling out energy from the two lines (1, 2) of the network to which a terminal of a voltage source is coupled, in that the network coupler symmetrically couples energy into and/or out of the two lines (1,2), in that the network coupler couples the data symmetrically, differentially and inductively or capacitively into and/or out of the two lines (1, 2), and in that the network coupler symmetrically terminates the two lines (1, 2).

Claims

1. A network coupler comprising at least two lines wherein the network coupler enables data transfer via the two lines of the network and coupling out energy from the two lines of the network to which a terminal of a voltage source is coupled, the network coupler symmetrically couples energy into and/or out of the two lines, the network coupler couples the data symmetrically, differentially, and inductively or capacitively into and/or out of the two lines, and the network coupler symmetrically terminates the two lines, wherein the data is transferred with opposite polarities through the at least two lines.

2. A network coupler as claimed in claim 1, characterized in that the network coupler comprises a first primary coil having a first terminal which is coupled to the first line of the network, and a second primary coil having a first terminal which is coupled to the second line of the network, in that the two second terminals of the first primary coil and the second primary coil are interconnected at a power supply point which supplies a power supply voltage, in that the network coupler comprises a secondary coil by means of which data can be coupled into or out of the two lines of the network, and in that the two primary coils and the secondary coil of a core are magnetically coupled together, and wherein a voltage is only induced in the winding of the secondary coil when differential currents occur in the primary coils.

3. A network coupler as claimed in claim 2, characterized in that the two primary coils consist of the same material and have the same cross-section, length and number of turns.

4. A network coupler as claimed in claim 3, characterized in that the two primary coils (4;

13;

21;

32), (5;

14;

22;

33) consist of the same material and have the same cross-section, length and number of turns.

5. A network coupler as claimed in claim 1, wherein the network coupler further comprises a secondary coil characterized in that the secondary coil has a higher number of turns than the primary coil.

6. A network coupler as claimed in claim 1, characterized in that the primary coils have a number of turns of n=1.

7. A network coupler as claimed in claim 1, characterized in that the primary coils are formed as metal strips which are preferably led cross-wise through the core.

8. A network coupler as claimed in claim 1, characterized in that a printed circuit having two-layer plate is provided on which both the two primary coils and secondary coils are printed as conductor tracks.