Coupling inductor

The utility model provides a coupling inductor, and relates to the field of integrated circuits, the coupling inductor comprises a first inductor and a second inductor which are coupled with each other, and the projection of the first inductor on the plane where the second inductor is located is partially overlapped with the second inductor; the projection of the second inductor on the plane wherethe first inductor is located is partially overlapped with the first inductor; and the absolute value of the difference between the overlapping area of the coupling inductor in the first state and the overlapping area of the coupling inductor in the second state is greater than 0. According to the utility model, functions required by circuit design can be realized more flexibly and more easily. 本实用新型提供了一种耦合电感，涉及集成电路领域，所述耦合电感包括相互耦合的第一电感与第二电感，其中，所述第一电感在所述第二电感所在平面上的投影局部地与所述第二电感交叠；所述第二电感在所述第一电感所在平面上的投影局部地与所述第一电感交叠；所述耦合电感在第一状态下的交叠区域面积，与所述耦合电感在第二状态下的交叠区域面积之间的差值绝对值大于0。本实用新型能够更灵活更容易地实现电路设计所需的功能。