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发明授权
CN104081579B 不可逆电路元件 有权

不可逆电路元件
摘要：
本发明涉及一种能够实现低输入阻抗并极力抑制发送侧电路的部件件数、成本的增加、并且能够不使插入损耗恶化地调整隔离频率的不可逆电路元件。该不可逆电路元件(隔离器)具备：铁氧体(32)；第一中心电极和第二中心电极(35、36)，以相互绝缘状态交叉地配置于铁氧体(32)；永久磁铁，对第一中心电极和第二中心电极(35、36)的交叉部分施加直流磁场。将第一中心电极(35)的一端设为输入端口(P1)并将另一端设为输出端口(P2)，将第二中心电极36的一端设为输入端口(P1)并将另一端设为接地端口(P3)，相互并联连接的电阻元件(R)和电容元件(C1)被以串联的方式连接在输入端口(P1)和输出端口(P2)之间，在输入端口(P1)和输出端口(P2)之间与电阻元件(R)并联连接有能够切换容量的电容单元(C12)。
摘要（英）：

A non-reciprocal circuit element includes a ferrite, a first central electrode and a second central electrode that are arranged on the ferrite so as to cross each other in an insulated state, and a permanent magnet configured to apply a DC magnetic field to a portion where the first and second central electrodes cross each other. One end of the first central electrode defines an input port and the other end thereof defines an output port. One end of the second central electrode defines the input port and the other end thereof defines a ground port. A resistance element and a capacitance element which are connected in parallel with each other are connected in series between the input port and the output port. A switching capacitance unit configured to switch a capacitance is connected in parallel with the resistance element between the input port and the output port.

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