A voltage-controlled adjustable inductor

Abstract

The embodiment of the invention discloses a voltage-controlled adjustable inductor which comprises a field effect transistor and an inductor coil, wherein the inductance coil consists of a conductive core body and an insulating layer; the surface of the conductive core body is wrapped by the insulating layer; the inductance coil comprises a coil part and an electrode part; the coil part is arranged in the field effect transistor; one end of the electrode part is connected with one end of the coil part; the other end of the electrode part exposes outside the voltage-controlled adjustable inductor by the electrode of the field effect transistor to form an inductance electrode; the surface of the coil part is provided with at least two contact points; the tail of the conductive core body at the position of the contact points is not covered with the insulating layer, but is covered with a first semiconductor material; the type of the first semiconductor material is as same as that of a semiconductor material of a doping region of a source electrode or a drain electrode; the contact points are positioned in a conductive channel; the number of the contact points positioned in the conductive channel is changed along with the change of the width of the conductive channel, so that the inductance amount of the adjustable inductor can be adjusted by changing the voltage of a grid electrode.

Description

technical field [0001] The invention relates to the field of inductors, in particular to a voltage-controlled adjustable inductor. Background technique [0002] The current mobile phone design needs to support more and more frequency bands, even reaching the 30-frequency level, which means that 30 radio frequency channels must be designed on a mobile phone. Each RF path consists of a large number of components, including inductors. In order to ensure the normal operation of each radio frequency channel, it is necessary to carry out matching and debugging on each radio frequency channel, including determining the inductance with a suitable inductance, so that the impedance matching of the radio frequency channel can reach the best state. [0003] In the prior art, the inductance used for the matching and debugging of the RF path is an inductor with a fixed inductance. When the inductance in the RF path cannot achieve impedance matching, the engineer needs to manually unsolde...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a voltage-controlled adjustable inductance, which is used to solve the problem of cumbersome operation caused by manually replacing the inductance in order to determine the appropriate inductance in the prior art

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