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15 条记录 (耗时 0.027 秒)

    High-frequency amplifier
    3.
    发明授权
    High-frequency amplifier 失效
    高频放大器

    公开(公告)号：US06750720B1

    公开(公告)日：2004-06-15

    申请号：US10149390

    申请日：2002-06-12

    申请人： Kazutomi Mori ,  Shintarou Shinjo ,  Hiroyuki Joba ,  Yoshinori Takahashi ,  Yukio Ikeda ,  Tadashi Takagi

    发明人： Kazutomi Mori ,  Shintarou Shinjo ,  Hiroyuki Joba ,  Yoshinori Takahashi ,  Yukio Ikeda ,  Tadashi Takagi

    IPC分类号： H03F304

    CPC分类号： H03F1/0261 ,  H03F1/302 ,  H03F3/19 ,  H03F3/343

    摘要： Between resistors 13, 14 and an NPN bipolar transistor 12 are interposed PNP bipolar transistors 21, 22 forming a current mirror 20 that uses a collector current of the NPN bipolar transistor 12 as a reference current, and determines a collector current of an NPN bipolar transistor 11. This makes possible to design a size ratio A of the PNP bipolar transistors 21, 22 so as to approximate a voltage drop &Dgr;Vb to a value close to zero, and to suppress the voltage drop &Dgr;Vb of the base voltage Vb accordingly to achieve a high power output and high efficiency when a high frequency input signal Pin increases and generates a base rectified current.

    摘要翻译： 在电阻器13,14和NPN双极晶体管12之间插入形成使用NPN双极晶体管12的集电极电流作为参考电流的电流镜20的PNP双极晶体管21,22，并且确定NPN双极晶体管的集电极电流 这使得可以设计PNP双极晶体管21,22的尺寸比A，以将电压降ΔVV近似为接近于零的值，并且相应地抑制基极电压Vb的电压降DeltaVb以实现 当高频输入信号Pin增加并产生基极整流电流时，高功率输出和高效率。

    Frequency converter
    5.
    发明授权
    Frequency converter 失效
    频率转换器

    公开(公告)号：US07002396B2

    公开(公告)日：2006-02-21

    申请号：US10481877

    申请日：2002-03-15

    申请人： Eiji Taniguchi ,  Chiemi Sawaumi ,  Noriharu Suematsu ,  Kenichi Maeda ,  Takayuki Ikushima ,  Hiroyuki Joba ,  Yoshinori Takahashi

    发明人： Eiji Taniguchi ,  Chiemi Sawaumi ,  Noriharu Suematsu ,  Kenichi Maeda ,  Takayuki Ikushima ,  Hiroyuki Joba ,  Yoshinori Takahashi

    IPC分类号： G06F7/44

    CPC分类号： H03D7/12 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458

    摘要： A frequency converter includes a transistor pair having a first transistor and a second transistor respectively having collector terminals commonly connected to each other and emitter terminals commonly connected to each other, the commonly-connected collector terminals of the transistor pair being connected to a power supply terminal by way of a first resistor, a third transistor having a collector terminal connected to the power supply terminal by way of a second resistor and an emitter terminal connected to the commonly-connected emitter terminals of the transistor pair, a third resistor having an end connected to the commonly-connected emitter terminals of the transistor pair, and another end grounded by way of a constant current source, and an output terminal connected to the commonly-connected collector terminals of the transistor pair. The frequency converter can exhibit an excellent saturation characteristic and an excellent distortion characteristic even when operating from a low voltage and/or a low current.

    摘要翻译： 一种频率转换器包括具有第一晶体管和第二晶体管的晶体管对，所述晶体管和第二晶体管分别具有彼此共同连接的集电极端子和共同连接的发射极端子，所述晶体管对的共同连接的集电极端子连接到电源端子 通过第一电阻器，具有通过第二电阻器连接到电源端子的集电极端子和连接到晶体管对的共同连接的发射极端子的发射极端子的第三晶体管，具有端部连接的第三电阻器 连接到晶体管对的共同连接的发射极端子，另一端通过恒定电流源接地，以及输出端子，连接到晶体管对的共同连接的集电极端子。 即使从低电压和/或低电流进行工作，变频器也能表现出优异的饱和特性和优异的失真特性。

    Mixer circuit
    10.
    发明授权
    Mixer circuit 失效
    搅拌机电路

    公开(公告)号：US06759887B2

    公开(公告)日：2004-07-06

    申请号：US10450819

    申请日：2003-06-18

    申请人： Yoshinori Takahashi ,  Hiroyuki Joba

    发明人： Yoshinori Takahashi ,  Hiroyuki Joba

    IPC分类号： G06F744

    CPC分类号： H03D7/1425 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D2200/0025

    摘要： A mixer circuit includes a local frequency multiplication unit including a pair of transistors having bases receiving local oscillation waves inverted in phase. A reference transistor is differentially connected with the pair of transistors. The pair of transistors and the reference transistor have their emitters connected to a collector of a modulated wave input transistor having a base receiving a modulated wave signal and an emitter connected to a constant current source, and have their collectors connected to a load. The commonly connected collectors of the pair of transistors and the collector of the reference transistor output modulation signals inverted in phase. The sum of currents flowing through the pair of transistors and the reference transistor equals the constant current of the constant current source flowing through the modulated wave input transistor, and the mixer circuit has a gain.

    摘要翻译： 混频器电路包括本地倍频单元，其包括具有接收相位反转的本地振荡波的基极对的一对晶体管。 参考晶体管与该对晶体管差分连接。 一对晶体管和参考晶体管的发射极连接到具有接收调制波信号的基极和连接到恒定电流源的发射极的调制波输入晶体管的集电极，并且使它们的集电极连接到负载。 一对晶体管的共同连接的集电极和参考晶体管的集电极输出调制信号同相反相。 流过该对晶体管和参考晶体管的电流的总和等于流经调制波输入晶体管的恒流源的恒定电流，并且混频器电路具有增益。