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US 8,390,386 B2Granted
Variable inductor
AssigneeRenesas Electronics Corporation
InventorAkira Tanabe
Life of this patent
Estimating the term…
Abstract
A variable inductor includes: a first inductor having two ends connected to a first terminal and a second terminal; a second inductor having two ends connected to the first terminal and the second terminal; a first node provided on the first inductor; a second node provided on the second inductor; and a switch element that switches between a conductive state and a non-conductive state between the first node and the second node.
Claims23
A variable inductor, comprising:
- a first inductor comprising two ends connected to a first terminal and a second terminal;
- a second inductor comprising two ends connected to said first terminal and said second terminal;
- a first node provided on said first inductor;
- a second node provided on said second inductor;
- and
- a switch element that switches between a conductive state and a non-conductive state between said first node and said second node, said switch element performing specific switching to provide different lengths of inductor coils,
- wherein said first node is provided on said first inductor at a first connection part between a first part of a first line of inductors and a second part of the first line of inductors, the first inductor comprising the first line of inductors connected in series, and
- wherein said second node is provided on said second inductor at a second connection part between a first part of a second line of inductors and a second part of the second line of inductors, the second inductor comprising the second line of inductors connected in series.
5 more elements
A variable inductor, comprising:
- a first inductor comprising two ends connected to a first terminal and a second terminal;
- a second inductor comprising two ends connected to said first terminal and said second terminal;
- a first node provided on said first inductor;
- a second node provided at a position different from said first node on said first inductor;
- and
- a switch element that switches between a conductive state and a non-conductive state between said first node and said second node, said switch element performing specific switching to provide different lengths of inductor coils,
- wherein said first node is provided on said first inductor at a first connection part between a first part of a first line of inductors and a second part of the first line of inductors, the first inductor comprising the first line of inductors connected in series,
- wherein said second node is provided on said first inductor at a second connection part between the second part of the first line of inductors and a third part of the first line of inductors, and
- wherein the second inductor comprises the second line of inductors connected in series.
6 more elements
A variable inductor, comprising:
- a first inductor comprising two ends connected to a first terminal and a second terminal;
- a second inductor comprising two ends connected to said first terminal and said second terminal;
- n switch elements, where n is a natural number;
- n nodes provided on said first inductor;
- and
- n nodes provided on said second inductor,
- wherein an i-th switch element, where i is a natural number from 1 to n, among said n switch elements switches between a conductive state and a non-conductive state between an i-th node counted from said first terminal of said first inductor and an i-th node counted from said second terminal of said second inductor, said i-th switch element performs specific switching to provide different lengths of inductor coils,
- wherein said i-th node counted from said first terminal of said first inductor is provided on said first inductor at a first connection part between a first part of a first line of inductors and a second part of the first line of inductors, the first inductor comprising the first line of inductors connected in series, and
- wherein said i-th node counted from said second terminal of said second inductor is provided on said second inductor at a second connection part between a first part of a second line of inductors and a second part of the second line of inductors, the second inductor comprising the second line of inductors connected in series.
6 more elements
A variable inductor apparatus, comprising:
- a first row of inductors;
- a second row of inductors arranged in parallel with the first row of inductors between a first terminal and a second terminal;
- a first node provided in between two inductors of the first row of inductors;
- a second node provided on the second row of inductors;
- and
- a switch provided between the first node and the second node to connect the first node and the second node to perform a specific switching to provide different lengths of the first and second inductor rows,
- wherein said first node is provided on said first row of inductors at a first connection part between a first part of a first line of inductors and a second part of the first line of inductors, the first row of inductors comprising the first line of inductors connected in series, and
- wherein said second node is provided on said second row of inductors at a second connection part between a first part of a second line of inductors and a second part of the second line of inductors, the second row of inductors comprising the second line of inductors connected in series.
5 more elements
A variable inductor apparatus, comprising:
- a first inductor configured in a concentric form;
- a second inductor configured in a concentric form arranged symmetrically and connected in parallel with the first inductor between a first terminal and a second terminal;
- a first node provided in the first inductor;
- a second node provided in the first inductor;
- and
- a switch provided between the first node and the second node to connect the first node and the second node to perform specific switching to provide different inductor coil lengths of the first inductor,
- wherein said first node is provided on said first inductor at a first connection part between a first part of a first line of inductors and a second part of the first line of inductors, the first inductor comprising the first line of inductors connected in series,
- wherein said second node is provided on said first inductor at a second connection part between the second part of the first line of inductors and a third part of the third line of inductors, and
- wherein the second inductor comprises the second line of inductors connected in series.
6 more elements
Dependencies are inferred from the claim text.