可変利得回路およびこれを備えたチューナシステム
    1.
    发明专利
    可変利得回路およびこれを備えたチューナシステム 审中-公开
    可变增益电路和配备有该调谐器系统

    公开(公告)号:JPWO2015019525A1

    公开(公告)日:2017-03-02

    申请号:JP2015530667

    申请日:2014-04-16

    Abstract: 可変利得トランスコンダクタンス増幅器は、入力端に接続された増幅トランジスタ(Tr1)と、ソースが増幅トランジスタのドレインに接続され、ドレインが出力端に接続されたカスコードトランジスタ(Tr2)と、増幅トランジスタとカスコードトランジスタとが接続されるノードを固定電位に接続するか否かを切り替える切替回路(14)とを備えている。また、可変利得回路(2)は、その可変利得トランスコンダクタンス増幅器を備えていてもよい。

    Abstract translation: 可变增益跨导放大器,和连接到输入端放大晶体管(TR1),连接到放大晶体管的漏极的源极,具有连接到所述输出端(TR2),放大晶体管和所述共源共栅晶体管的漏极共源共栅晶体管 赌注是用于切换是否连接到一个固定电势(14)连接的节点的切换电路。 可变增益电路(2)可以包括可变增益跨导放大器。

    Amplifying device and control method thereof
    5.
    发明专利
    Amplifying device and control method thereof 审中-公开
    放大器件及其控制方法

    公开(公告)号:JP2010245666A

    公开(公告)日:2010-10-28

    申请号:JP2009089877

    申请日:2009-04-02

    CPC classification number: H03G1/0088 H03G1/0023 H03G3/001

    Abstract: PROBLEM TO BE SOLVED: To provide an amplifying device which maintains linearity of a gain and a control method thereof.
    SOLUTION: The device is provided with: first amplifying parts (91 to 97) for changing its gain in a stepwise manner; a second amplifying part 99 which is connected in series to the first amplifying parts (91 to 97), and changes its gain in a stepwise manner; and a gain control part 100 which controls gain setting of the first amplifying parts (91 to 97) and the second amplifying part 99. The first amplifying parts (91 to 97) has a gain variable range necessary for amplifying the input signal to a predetermined desired level. The second amplifying part 99 has a gain variable range narrower than that of the first amplifying part. The gain control part 100 changes uses the second amplifying part preferentially over the first amplifying part to change the gain setting.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题:提供一种保持增益线性度的放大装置及其控制方法。 解决方案:该装置具有:用于逐步改变其增益的第一放大部件(91至97) 与第一放大部件(91〜97)串联连接的第二放大部件99,以逐步的方式改变其增益; 以及控制第一放大部件(91〜97)和第二放大部件99的增益设定的增益控制部件100.第一放大部件(91〜97)具有将输入信号放大至规定值所需的增益可变范围 期望水平。 第二放大部件99的增益可变范围比第一放大部件的范围窄。 增益控制部分100改变使用优先在第一放大部分上的第二放大部分来改变增益设置。 版权所有(C)2011,JPO&INPIT

    Variable gain rf amplifier
    7.
    发明专利
    Variable gain rf amplifier 有权
    可变增益射频放大器

    公开(公告)号:JP2009260972A

    公开(公告)日:2009-11-05

    申请号:JP2009102195

    申请日:2009-04-20

    Abstract: PROBLEM TO BE SOLVED: To provide a variable gain amplifier capable of reducing device current consumption and area by extremely decreasing the number of components through which RF signal must pass. SOLUTION: The variable gain amplifier comprises: an input node; a variable current source coupled to the input node; first and second branches coupled in parallel between a first supply terminal and the variable current source, the first and second branches defining a differential pair arranged to be controlled by first and second differential gain signals and having first and second output terminals, one of the output terminals including an output node of the variable gain amplifier; and a potential divider having a middle node coupled to the first and second output terminals, wherein the middle node is also coupled to the input node via a capacitor. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题:提供一种可以通过极大地减少RF信号必须通过的分量的数量来减少器件电流消耗和面积的可变增益放大器。 解决方案:可变增益放大器包括:输入节点; 耦合到所述输入节点的可变电流源; 第一和第二分支并联耦合在第一电源端子和可变电流源之间,第一和第二分支限定一个差分对,其布置为由第一和第二差分增益信号控制,并具有第一和第二输出端子,输出之一 端子,包括可变增益放大器的输出节点; 以及具有耦合到所述第一和第二输出端子的中间节点的分压器,其中所述中间节点还经由电容器耦合到所述输入节点。 版权所有(C)2010,JPO&INPIT

    Monotonic variable gain amplifier and an automatic gain control circuit

    公开(公告)号:JP2009516979A

    公开(公告)日:2009-04-23

    申请号:JP2008541886

    申请日:2006-11-22

    CPC classification number: H03G1/0023

    Abstract: 所望の利得を達成するように制御できる単調な可変利得増幅器であって、該増幅器は、入出力端子間に並列に接続される少なくとも2つの増幅段(41〜45)と、制御ループ(190)とを備え、各増幅段は、周期的電気入力信号によって制御されるバイアス電流(I
    bi )が流れる固定利得トランスコンダクタンス増幅器(100,102)と、電圧源から得られるバイアス電流量(I
    1i )に対する、第1の出力点から得られるバイアス電流量(I
    bi )の比率を変えるように制御可能な可制御分流器(104,106)とを有し、制御ループ(190)は、出力される増幅したDC電流に併うDC電圧を一定レベルに保持する。

    Variable gain circuit
    9.
    发明专利
    Variable gain circuit 审中-公开
    可变增益电路

    公开(公告)号:JP2009055190A

    公开(公告)日:2009-03-12

    申请号:JP2007218401

    申请日:2007-08-24

    Inventor: KIMURA KATSUHARU

    CPC classification number: H03G1/0023

    Abstract: PROBLEM TO BE SOLVED: To provide a variable gain circuit having a small approximate error and a wide dynamic range while employing a comparatively small circuit scale.
    SOLUTION: This variable gain circuit having a region where a gain changes at a substantial exponential function for a control voltage has the region in which a gain changes is represented by a substantial exponential function on the basis of a function, where the control voltage is a variable x. The denominator and numerator of the above function are sum currents ICON2 and ICON1 of a drain current and a constant current IK of two transistors M1 and M2 in which the sources are grounded and the gates are commonly connected, a bias voltage VG is applied and a differential input voltage VC is inputted from a back gate.
    COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题:提供具有小的近似误差和宽动态范围的可变增益电路,同时采用相对较小的电路规模。 解决方案:具有增益以控制电压的指数函数变化的区域的可变增益电路具有基于功能的基本指数函数来表示增益改变的区域,其中控制 电压是一个变量x。 上述功能的分母和分子是源极接地并且栅极共同连接的两个晶体管M1和M2的漏极电流和恒定电流IK的和电流ICON2和ICON1,施加偏置电压VG和 差分输入电压VC从后门输入。 版权所有(C)2009,JPO&INPIT

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