公开(公告)号：US07808319B2

公开(公告)日：2010-10-05

申请号：US12325400

申请日：2008-12-01

申请人： Byung Sung Kim ,  Tae Sung Kim

发明人： Byung Sung Kim ,  Tae Sung Kim

IPC分类号： H03F3/45

CPC分类号： H03F3/45188 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0043 ,  H03F1/3211 ,  H03F3/45183 ,  H03F2203/45318 ,  H03F2203/45386 ,  H03F2203/45544 ,  H03F2203/45608

摘要： A differential amplifier circuit and a frequency mixer for improving linearity are disclosed. The disclosed differential amplifier circuit includes first and second loads, a first output terminal for the first load, a second output terminal for the second load, a differential amplifying stage including a differential stage for amplifying a voltage difference between a first input stage and a second input stage, and a biasing current source for biasing the differential stage, and a non-linearity filtering circuit for filtering a non-linear signal generated from the differential amplifying stage. The non-linearity filtering circuit includes a first cross circuit including a first transistor to connect the first and second output terminals, and a second cross circuit including a second transistor to connect the first and second output terminals. The differential amplifier circuit achieves an improvement in linearity, as compared to conventional differential amplifier circuits, by offsetting, at a load side, a non-linear component generated at an active element of the differential amplifier circuit, to output only a linear current component.

摘要翻译： 公开了一种用于提高线性度的差分放大器电路和混频器。 所公开的差分放大器电路包括第一和第二负载，用于第一负载的第一输出端，​​用于第二负载的第二输出端，差分放大级，包括用于放大第一输入级与第二负载之间的电压差的差分级 输入级和用于偏置差分级的偏置电流源，以及用于对从差分放大级产生的非线性信号进行滤波的非线性滤波电路。 非线性滤波电路包括：第一交叉电路，包括用于连接第一和第二输出端子的第一晶体管和包括第二晶体管的第二交叉电路，以连接第一和第二输出端子。 与传统的差分放大器电路相比，差分放大器电路通过在负载侧偏移在差分放大器电路的有源元件处产生的非线性分量来仅实现线性电流分量而实现了线性的改善。

公开(公告)号：US07180455B2

公开(公告)日：2007-02-20

申请号：US11091987

申请日：2005-03-29

申请人： Sae Won Oh ,  Chul Ho Kim ,  Hyun Hak Kim ,  Tae Sung Kim ,  Young Deg Kim ,  Gi Tae Do

发明人： Sae Won Oh ,  Chul Ho Kim ,  Hyun Hak Kim ,  Tae Sung Kim ,  Young Deg Kim ,  Gi Tae Do

IPC分类号： H01Q21/00 ,  H01Q1/36

CPC分类号： H01Q1/362 ,  H01Q5/357 ,  H01Q5/371 ,  H01Q9/0421 ,  H01Q21/30

摘要： A broadband internal antenna includes a first radiator having a radiation part with one or more coils having different pitch intervals connected in series to each other, and a second radiator having at least one conductive strip line arranged parallel to a longitudinal direction of the first radiator. The antenna further includes a connection part to which an end of the at least one conductive strip line is connected, to which a first end of the first radiator is attached and in which a part for supplying current to the antenna and a part for grounding the antenna are formed, and an attachment pad to which a second end of the first radiator is attached and from which current is drawn. Current flowing through the first radiator and current flowing through the strip lines form current paths in different directions to set a certain broadband using mutual Electromagnetic (EM) coupling.

摘要翻译： 宽带内部天线包括具有辐射部分的第一散热器，所述辐射部分具有彼此串联连接的具有不同节距间隔的一个或多个线圈，以及具有平行于第一散热器的纵向方向布置的至少一个导电带线的第二辐射器。 所述天线还包括连接所述至少一个导电带状线的端部的连接部分，所述第一辐射体的第一端被连接到所述连接部分，并且所述连接部分用于向所述天线供电并将所述部分接地 形成天线，以及附接焊盘，第一散热器的第二端附接到该附接焊盘，并且从该电极被拉出。 流过第一辐射器的电流和流过条带线的电流在不同方向上形成电流路径，以使用相互电磁（EM）耦合来设定一定宽度。