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US08390094B2 Switching element, variable inductor, and electronic circuit device having circuit configuration incorporating the switching element and the variable inductor 失效
开关元件，可变电感器和具有并入开关元件和可变电感器的电路配置的电子电路器件

Switching element, variable inductor, and electronic circuit device having circuit configuration incorporating the switching element and the variable inductor
Abstract:
An inexpensive variable inductor has inductance value continuously changeable without reducing a Q value. When a control voltage is applied to a control terminal of a MOS transistor from a power supply, a continuity region is formed in a channel, and a region between main terminals becomes conductive. When the control voltage is changed, length of the continuity region in the channel is changed. This changes length of a path area of an induced current, flowing in an induced current film. Thus, the amount of induced current is increased or decreased. Therefore, when the control voltage of the MOS transistor is changed, the inductance value of the coil is continuously changed.
Abstract(Chinese):

廉价的可变电感器具有连续可变的电感值，而不降低Q值。 当从电源向MOS晶体管的控制端施加控制电压时，在通道中形成连续性区域，并且主端子之间的区域变为导通状态。 当控制电压变化时，通道中的连续性区域的长度改变。 这改变了在感应电流膜中流动的感应电流的路径区域的长度。 因此，感应电流的量增加或减小。 因此，当MOS晶体管的控制电压改变时，线圈的电感值连续变化。

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