Continuously tunable inductor with variable resistors

A technology of inductors and resistors, applied in the field of adjustable inductors, can solve problems such as reducing the performance of inductors

Inactive Publication Date: 2011-11-09
TAIWAN SEMICON MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As with the previously discussed techniques, this application is limited to the fact that the inductor will be modulated in discrete increments
Likewise, a switch in series with a spiral inductor can significantly degrade the inductor's effectiveness due to the high series resistance of the switch

Method used

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  • Continuously tunable inductor with variable resistors
  • Continuously tunable inductor with variable resistors
  • Continuously tunable inductor with variable resistors

Examples

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Embodiment Construction

[0030] The description of the embodiments can be read in conjunction with the attached drawings, which should also be considered part of the description of the present invention. Related words in the description, such as lower, higher, horizontal, vertical, above, below, up, down, top, bottom, and words extended from these words (such as horizontally, downwardly, upwardly) etc.) should be interpreted in the direction illustrated or shown in the drawings. These relative terms are for convenience of description and do not require a particular orientation in which to construct or operate the device. Words referring to attached, coupled (whether physical or structure indirect connection), and the connection relationship between the two is movable or fixed.

[0031] An improved adjustable inductor will be described below with reference to the accompanying drawings. In contrast to variable inductors, which can only be adjusted in discrete increments, the arrangement of the adjust...

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Abstract

The invention provides an integrated continuously tunable inductor and a method for adjusting the tunable inductor integrated in an integrated circuit. The integrated tunable inductor includes a primary inductor having a plurality of inductor turns, at least one closed loop eddy current coil proximate the primary inductor, and at least one variable resistor integrated in series with the eddy current coil. The inductance is continuously tunable across a range of inductances.

Description

technical field [0001] The invention relates to an integrated inductor, in particular to an integrated adjustable inductor, a continuously adjustable inductor and a method for adjusting the adjustable inductor integrated in an integrated circuit. Background technique [0002] An inductor is an electronic device that generates inductance into a circuit or acts on a circuit through inductance. In some applications, tunable inductors are quite useful. Circuit designs such as RF applications will also benefit from the use of tunable inductors. In particular, tuned circuits (including LC oscillators for loads, filters, impedance matching, etc.) may use tunable inductors to adjust the center frequency. [0003] The inductance value L of the inductor will be determined by the amount of bending of the coil between the two electronic contact points, and we can adjust the amount of bending between the two ends. However, such a variable inductor is not feasible in integrated circuit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F21/02H01F27/40
CPCH01F2021/125H01F21/005H01F21/02
Inventor 叶子祯谭凯文蔡铭宪周淳朴薛福隆
Owner TAIWAN SEMICON MFG CO LTD
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