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    Balanced transconductor and electronic device
    2.
    发明授权
    Balanced transconductor and electronic device 有权
    平衡式跨导体和电子器件

    公开(公告)号：US06680627B2

    公开(公告)日：2004-01-20

    申请号：US10253259

    申请日：2002-09-24

    申请人： John B. Hughes

    发明人： John B. Hughes

    IPC分类号： H03D1100

    CPC分类号： H03F3/45991 ,  H03F3/45959 ,  H03F2200/294 ,  H03F2200/372 ,  H03H11/045 ,  H03H2011/0494

    摘要： A balanced transconductor having a pair of voltage inputs and a pair of current outputs comprises a pair of single-ended transconductors, one in each signal path and a cancellation network. The cancellation network cancels at the inputs to the single-ended transconductors a common mode voltage appearing at the voltage inputs so that no common mode output current results. The cancellation network may comprise four half-size single-ended transconductors drawing half the supply current of full-size single-ended transconductors.

    摘要翻译： 具有一对电压输入和一对电流输出的平衡跨导体包括一对单端跨导器，每个信号路径中的一个和消除网络。 取消网络在单端跨导体的输入端消除出现在电压输入端的共模电压，从而不产生共模输出电流。 取消网络可以包括四个半尺寸的单端跨导体，其全部尺寸的单端跨导体的供电电流的一半。

    Balanced transconductor and electronic device
    3.
    发明申请
    Balanced transconductor and electronic device 有权
    平衡式跨导体和电子器件

    公开(公告)号：US20030080786A1

    公开(公告)日：2003-05-01

    申请号：US10253259

    申请日：2002-09-24

    申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V.

    发明人： John B. Hughes

    IPC分类号： H03D001/00

    CPC分类号： H03F3/45991 ,  H03F3/45959 ,  H03F2200/294 ,  H03F2200/372 ,  H03H11/045 ,  H03H2011/0494

    摘要： A balanced transconductor having a pair of voltage inputs and a pair of current outputs comprises a pair of single-ended transconductors, one in each signal path and a cancellation network. The cancellation network cancels at the inputs to the single-ended transconductors a common mode voltage appearing at the voltage inputs so that no common mode output current results. The cancellation network may comprise four half-size single-ended transconductors drawing half the supply current of full-size single-ended transconductors.

    摘要翻译： 具有一对电压输入和一对电流输出的平衡跨导体包括一对单端跨导器，每个信号路径中的一个和消除网络。 取消网络在单端跨导体的输入端消除出现在电压输入端的共模电压，从而不产生共模输出电流。 取消网络可以包括四个半尺寸的单端跨导体，其全部尺寸的单端跨导体的供电电流的一半。

    Simultaneous Gm-C filter and variable gain amplifier circuit
    4.
    发明申请
    Simultaneous Gm-C filter and variable gain amplifier circuit 审中-公开
    同时Gm-C滤波器和可变增益放大器电路

    公开(公告)号：US20040198287A1

    公开(公告)日：2004-10-07

    申请号：US10266809

    申请日：2002-10-08

    发明人： Bradley A. Kramer

    IPC分类号： H04B001/16 ,  H04B001/06

    CPC分类号： H03H11/045

    摘要： A system and method are provided for reducing the current consumption of receivers such as direct conversion receivers associated with modem receiver systems as well as low IF receiver systems, among others. The system and method dramatically reduce the current consumption in receivers due to three factors. 1) Since the filter 302 also performs the VGA function, the current consumption of the VGA 304 is eliminated; 2) Since the gain partitioning of the structure 200 depicted in FIG. 2 is superior, the noise performance of the filter 302 is greatly reduced; and the base band LNA 304 can be eliminated, also eliminating the current consumption of the base band LNA 304; and 3) The folded gm structure 500 depicted in FIG. 5 can be used, cutting the current consumption of the base band filter 302 by a factor of two. The structure 200 notably does require control circuitry to set the gm values of the forward and feedback paths independently. The current consumption of this control circuitry however, is far less than the current saved due to the three factors discussed herein above. The base band circuitry current consumption can be reduced by about a factor or three by implementing the structure 200.

    摘要翻译： 提供了一种用于减少诸如与调制解调器接收机系统以及低IF接收机系统等相关联的直接转换接收机的接收机的电流消耗的系统和方法。 由于三个因素，系统和方法大大降低了接收机的电流消耗。 1）由于滤波器302还执行VGA功能，所以消除了VGA 304的电流消耗; 2）由于图1所示的结构200的增益分配， 2优越，滤波器302的噪声性能大大降低; 并且可以消除基带LNA 304，也消除了基带LNA 304的电流消耗; 和3）图1中所示的折叠的gm结构500。 可以使用5，将基带滤波器302的电流消耗降低一倍。 结构200特别地要求控制电路独立地设置正向和反馈路径的gm值。 然而，该控制电路的电流消耗远远小于由于上述讨论的三个因素而节省的电流。 通过实施结构200，基带电路电流消耗可以减少大约一个因子或三个。

    Variable gain transconductance amplifier and variable bandwidth filter
    5.
    发明授权
    Variable gain transconductance amplifier and variable bandwidth filter 失效
    可变增益跨导放大器和可变带宽滤波器

    公开(公告)号：US4881043A

    公开(公告)日：1989-11-14

    申请号：US242998

    申请日：1988-09-12

    申请人： Barry L. Jason

    发明人： Barry L. Jason

    IPC分类号： H03F3/45 ,  H03G1/00 ,  H03G5/10 ,  H03H11/04

    CPC分类号： H03G1/0023 ,  H03F3/45286 ,  H03G5/10 ,  H03H11/0433 ,  H03H11/045 ,  H03H11/0472 ,  H03H2210/015 ,  H03H2210/023

    摘要： A variable gain transconductance amplifier wherein complimentary input followers are used in conjunction with the multiplier to provide a high input impedance. A pair of multiplier input devices are embedded in the input followers to reduce the supply voltage used by the multiplier and to improve signal handling capability while reducing the supply voltage required. Further, these variable gain transconductance amplifiers are used in active filters to provide adjustment of the bandwidth without affecting the center frequency.

    摘要翻译： 可变增益跨导放大器，其中互补输入跟随器与乘法器一起使用以提供高输入阻抗。 输入跟随器中嵌入一对乘法器输入器件，以减少乘法器使用的电源电压，并在减少所需电源电压的同时提高信号处理能力。 此外，这些可变增益跨导放大器用于有源滤波器以提供带宽的调整而不影响中心频率。

    Active transconductance filter device
    6.
    发明授权
    Active transconductance filter device 失效
    有源跨导滤波器

    公开(公告)号：US4839542A

    公开(公告)日：1989-06-13

    申请号：US642912

    申请日：1984-08-21

    申请人： Jeffrey I. Robinson

    发明人： Jeffrey I. Robinson

    IPC分类号： G06G7/184 ,  H03H11/04

    CPC分类号： H03H11/045 ,  G06G7/184

    摘要： An integrator is described that is useful in forming low pass, band pass, high pass, and band stop filters. The integrator comprises a transconductance amplifier and a capacitor which is connected between the amplifier output terminal and the amplifier ground. When implemented as a monolithic IC, the integrator gain is fundamentally process independent. A ladder structure comprising one or more of these integrators provides high order filtering characteristics without many of the problems associated with conventional filter devices. In addition, the integrator provides stop band, zero filter characteristics at the filter output terminal when a capacitor is connected across the differential input terminals of the integrator.

    摘要翻译： 描述了在形成低通，带通，高通和带阻滤波器中有用的积分器。 积分器包括跨导放大器和连接在放大器输出端子和放大器接地之间的电容器。 当实现为单片IC时，积分器的增益基本上与流程无关。 包括这些积分器中的一个或多个的梯形结构提供高阶滤波特性，而没有与常规滤波器装置相关的许多问题。 此外，当积分器的差分输入端子连接电容器时，积分器在滤波器输出端子处提供阻带，零滤波器特性。

    Balanced amplifier and filter using the same
    9.
    发明授权
    Balanced amplifier and filter using the same 失效
    平衡放大器和滤波器使用相同

    公开(公告)号：US06781464B2

    公开(公告)日：2004-08-24

    申请号：US10281103

    申请日：2002-10-28

    申请人： Takeshi Ueno ,  Tetsuro Itakura ,  Zdzislaw Czarnul

    发明人： Takeshi Ueno ,  Tetsuro Itakura ,  Zdzislaw Czarnul

    IPC分类号： H03F345

    CPC分类号： H03F3/211 ,  H03F3/45475 ,  H03F3/45632 ,  H03F3/45766 ,  H03F3/45928 ,  H03F3/45991 ,  H03F2203/45138 ,  H03H11/045 ,  H03H11/32

    摘要： A balanced amplifier comprising a pair of voltage-to-current converters including a first input terminal, a second input terminal, a first output terminal and a second output terminal to convert an input voltage applied to the first input terminal into an output current output from each of the first output terminal and the second output terminal, the second input terminal and the second output terminal of one of the converters being connected to the second input terminal and the second output terminal of the other of the converters to cancel common-mode components each other and extract differential-mode components.

    摘要翻译： 一种平衡放大器，包括一对电压 - 电流转换器，包括第一输入端子，第二输入端子，第一输出端子和第二输出端子，用于将施加到第一输入端子的输入电压转换为从 第一输出端子和第二输出端子，其中一个转换器的第二输入端子和第二输出端子连接到另一个转换器的第二输入端子和第二输出端子，以抵消共模元件 并提取差分模式组件。

    Method and arrangement for filtering with common mode feedback for low power consumption
    10.
    发明授权
    Method and arrangement for filtering with common mode feedback for low power consumption 有权
    用于低功耗的共模反馈滤波的方法和装置

    公开(公告)号：US06407658B2

    公开(公告)日：2002-06-18

    申请号：US09311447

    申请日：1999-05-14

    申请人： Timothy C. Kuo

    发明人： Timothy C. Kuo

    IPC分类号： H03B100

    CPC分类号： H03H11/045

    摘要： Improved common mode feedback is provided in differential amplifying-type gyrator filters. One specific implementation is directed to a signal-filtering circuit arrangement, comprising a transconductance cell, and a common mode feedback circuit including MOS-based transistors arranged to minimize loading on the transconductance cell. The transconductance cell has first and second current paths, each passing current between power terminals. The common mode feedback circuit includes a high-impedance circuit configured and arranged to compare a sampled common mode voltage to a reference voltage and to provide common mode feedback to the transconductance cell with minimized loading, and further includes a signal-sampling circuit for sampling the common mode voltage of the transconductance cell using a high impedance isolation arrangement of MOS-type transistors. The above implementation is especially useful in connection with integration of such filters as part of IC applications, while providing superior filter linearity and stopband rejection.

    摘要翻译： 差分放大型回转器滤波器提供改进的共模反馈。 一个具体实现涉及包括跨导单元的信号滤波电路装置，以及包括基于MOS的晶体管的共模反馈电路，其被布置为最小化跨导单元上的负载。 跨导单元具有第一和第二电流路径，每个通过电源端子之间的电流。 共模反馈电路包括配置和布置成将采样的共模电压与参考电压进行比较并且以最小的负载向跨导单元提供共模反馈的高阻抗电路，并且还包括信号采样电路，用于对 使用MOS型晶体管的高阻抗隔离布置的跨导电池的共模电压。 上述实现在与作为IC应用的一部分的这种滤波器的集成方面特别有用，同时提供优异的滤波器线性度和阻带抑制。