Magnetic Coupling and Cancellation Arrangement

• US 20140140028A1
• Filed: 11/21/2012
• Published: 05/22/2014
• Est. Priority Date: 11/21/2012
• Status: Abandoned Application

• Current Assignee: Qualcomm technologies international, ltd. (Qualcomm, Inc.)
• Original Assignee: Cambridge Silicon Radio Limited (Qualcomm, Inc.)
• Inventors: Lenive, Vlad
• Application Number:
  US13/684,036
• Publication Number:
  US 20140140028A1
• Time in Patent Office: Days
• US Class Current: 361/782
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01L 23/5227 Inductive arrangements or effects of, or between, wiring layers other inductive arrangements H01L23/645
• CPC Class Codes: H01L 28/10 Inductors
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05K 13/04 Mounting of components , e.g. of leadless components
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor

Abstract

An inductor arrangement comprises a first inductor formed on a substrate, a second inductor formed on the substrate, a first loop formed on the substrate adjacent to the first inductor and a phasing network connected to the first loop which is arranged to receive an input signal representative of a flow of magnetic flux through the second inductor and to apply a first current to the first loop for generating a flow of magnetic flux for reducing magnetic coupling between the second inductor and the first inductor. A second loop can be formed on the substrate adjacent to the second inductor which is arranged to generate a second current in response to a flow of magnetic flux through the second loop, with the second current being the signal representative of a flow of magnetic flux through the second inductor.

Claims

1. An inductor arrangement comprising:

a substrate;

a first inductor formed on the substrate;

a second inductor formed on the substrate;

a first loop formed on the substrate adjacent to the first inductor;

a phasing network connected to the first loop which is arranged to receive an input signal representative of a flow of magnetic flux through the second inductor and to apply a first current to the first loop for generating a flow of magnetic flux for reducing magnetic coupling between the second inductor and the first inductor.

2. An inductor arrangement according to claim 1 further comprising a second loop formed on the substrate adjacent to the second inductor which is arranged to generate a second current in response to a flow of magnetic flux through the second loop and wherein the second current is the signal representative of a flow of magnetic flux through the second inductor.

3. An inductor arrangement according to claim 1 wherein the phasing network is arranged to modify phase of the first current with respect to phase of the input signal.

4. An inductor arrangement according to claim 1 wherein the phasing network is arranged to modify amplitude of the first current with respect to amplitude of the input signal.

5. An inductor arrangement according to claim 2 wherein the phasing network is arranged to modify a rotational direction of the first current compared to a rotational direction of the second current.

6. An inductor arrangement according to claim 5 wherein the phasing network comprises a pair of cross-connects which are connected between respective ends of the first loop and the second loop such that a rotational direction of the first current is reversed compared to a rotational direction of the second current.

7. An inductor arrangement according to claim 1 wherein the phasing network is arranged to perform a frequency-selective modifying of the input signal.

8. An inductor arrangement according to claim 1 wherein the phasing network is a passive network.

9. An inductor arrangement according to claim 1 wherein the phasing network comprises at least one amplifier.

10. An inductor arrangement according to claim 1 wherein the phasing network is arranged to sense the input signal and to vary a property of the first current in response to the input signal.

11. An inductor arrangement according to claim 10 wherein the phasing network is arranged to sense a third harmonic inter-modulation product of the input signal.

12. An inductor arrangement according to claim 1 wherein the phasing network is adjustable.

13. An inductor arrangement according to claim 2 wherein the first loop is positioned on a side of the first inductor nearest to the second inductor and the second loop is positioned on a side of the second inductor nearest to the first inductor.

14. An inductor arrangement according to claim 2 wherein the phasing network is positioned between the first loop and the second loop.

15. An inductor arrangement according to claim 1 wherein the first loop is symmetrical about a line of symmetry between a centre of the first inductor and a centre of the second inductor.

16. An inductor arrangement according to claim 1 wherein the second inductor forms part of a circuitry module and wherein there is an electrical connection between the circuitry module and the phasing network for providing the signal representative of a flow of flux through the second inductor.

17. An inductor arrangement according to claim 1 wherein the second inductor forms part of a circuitry module, and the circuitry module comprises a further inductor, the inductor arrangement further comprising a second loop formed on the substrate adjacent to the further inductor which is arranged to generate a second current in response to a flow of magnetic flux through the second loop and wherein the second current is the signal representative of a flow of magnetic flux through the second inductor.

18. An inductor arrangement according to claim 1 in the form of an integrated circuit.

19. A method of manufacturing an inductor arrangement on a substrate comprising:

forming a first inductor on the substrate;

forming a second inductor on the substrate;

forming a first loop on the substrate adjacent to the first inductor;

forming a phasing network connected to the first loop which is arranged to receive an input signal representative of a flow of magnetic flux through the second inductor and to apply a first current to the first loop for generating a flow of magnetic flux for reducing magnetic coupling between the second inductor and the first inductor.

20. A method of reducing magnetic coupling between a first inductor and a second inductor on a substrate, wherein a loop is provided on the substrate adjacent to the first inductor, the method comprising:

receiving a signal representative of a flow of magnetic flux through the second inductor; and

,

applying a current to the loop for generating a flow of magnetic flux for reducing magnetic coupling between the second inductor and the first inductor.