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10 条记录 (耗时 0.013 秒)

    Circuit and method for correcting phase error in a multiplier circuit
    2.
    发明授权
    Circuit and method for correcting phase error in a multiplier circuit 失效
    用于校正乘法器电路中的相位误差的电路和方法

    公开(公告)号：US5659263A

    公开(公告)日：1997-08-19

    申请号：US622536

    申请日：1996-03-25

    申请人： Stephen W. Dow ,  David K. Lovelace ,  Jeffrey C. Durec

    发明人： Stephen W. Dow ,  David K. Lovelace ,  Jeffrey C. Durec

    IPC分类号： G06G7/163 ,  H03D13/00 ,  H03L7/087 ,  H04L27/22 ,  G06F7/44

    CPC分类号： H03L7/087 ,  G06G7/163 ,  H03D13/008

    摘要： A circuit and method for reducing a phase error at the output terminal (48) of a multiplier circuit (41) is provided. The phase error arises when first and second input signals having asymmetric signal paths are multiplied in the multiplier circuit (41). A second multiplier circuit (42) multiplies the in-phase and quadrature signals and produces an output signal at an output terminal (49) which contains the phase error but with the opposite polarity as the phase error produced by the first multiplier circuit (41). The signals at the output terminals (48) and (49) are summed in a summing circuit (43) to produce a third output signal in which the phase error is canceled.

    摘要翻译： 提供了一种用于减小乘法器电路（41）的输出端（48）的相位误差的电路和方法。 当具有不对称信号路径的第一和第二输入信号在乘法器电路（41）中相乘时，产生相位误差。 第二乘法电路（42）将同相和正交信号相乘，并在包含相位误差但具有与第一乘法器电路（41）产生的相位误差相反的极性的输出端子（49）产生输出信号， 。 输出端子（48）和（49）上的信号在求和电路（43）中相加，以产生消除相位误差的第三输出信号。

    Adjustable gain control system and method thereof
    4.
    发明授权
    Adjustable gain control system and method thereof 失效
    可调增益控制系统及其方法

    公开(公告)号：US06693490B2

    公开(公告)日：2004-02-17

    申请号：US10092968

    申请日：2002-03-07

    申请人： Praveen Manapragada ,  Stephen W. Dow

    发明人： Praveen Manapragada ,  Stephen W. Dow

    IPC分类号： H03F326

    CPC分类号： H03G3/3036 ,  H03F3/45085 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45464

    摘要： An adjustable gain control (AGC) system with improved gain control accuracy and method thereof is disclosed. The system includes an offset circuit for providing an offset signal that is selectable; a gain setting source for providing a gain set signal that is dependent on a desired gain and the offset signal; and an AGC circuit, coupled to the offset signal and gain set signal, for providing a gain control signal, the AGC circuit compensating, according to the offset signal, the gain control signal for process variables corresponding to the AGC circuit to provide a plurality of predetermined gains for the amplifier that correspond, respectively, to a plurality of desired gains indicated by respective gain select signals.

    摘要翻译： 公开了一种具有改进的增益控制精度的可调增益控制（AGC）系统及其方法。 该系统包括用于提供可选择的偏移信号的偏移电路; 用于提供取决于期望增益的增益设置信号和偏移信号的增益设置源; 以及AGC电路，其耦合到所述偏移信号和增益设置信号，用于提供增益控制信号，所述AGC电路根据所述偏移信号补偿与所述AGC电路相对应的处理变量的增益控制信号，以提供多个 放大器的预定增益分别对应于由各个增益选择信号指示的多个期望增益。

    Integrated frequency selectable resonant coupling network and method thereof
    7.
    发明授权
    Integrated frequency selectable resonant coupling network and method thereof 有权
    集成频率可选谐振耦合网络及其方法

    公开(公告)号：US06889036B2

    公开(公告)日：2005-05-03

    申请号：US10092932

    申请日：2002-03-07

    申请人： Brian M. Ballweber ,  Stephen W. Dow

    发明人： Brian M. Ballweber ,  Stephen W. Dow

    IPC分类号： H03F1/56 ,  H03H11/12 ,  H04B1/40 ,  H04B1/18 ,  H03J3/20

    CPC分类号： H03F1/56 ,  H03F2200/294 ,  H03H11/1291 ,  H04B1/406

    摘要： An integrated center frequency selectable resonant coupling network suited for use in an integrated circuit is disclosed. The network includes an integrated coupling transformer having a secondary winding for coupling to a load and a primary winding for coupling to a source; a first integrated capacitive circuit controllably coupled across one of the primary and secondary windings and when so coupled operable to resonate with the integrated coupling transformer at a frequency in a first frequency band; and a second integrated capacitive circuit coupled across a second one of the primary and the secondary windings that is operable to resonate with the integrated coupling transformer at a frequency in a second frequency band. The method is in an IC and includes providing and coupling an input signal within alternatively a first frequency band and a second frequency band to a primary winding of an integrated coupling transformer; controlling an integrated switched capacitor network, coupled to the transformer, to provide a coupling network that is alternatively and respectively resonant at a first and second frequency within the first and second frequency band thus selectively providing an output signal at a secondary winding of the transformer; and down converting the output signal.

    摘要翻译： 公开了一种适用于集成电路的集成中心频率可选谐振耦合网络。 网络包括具有用于耦合到负载的次级绕组和用于耦合到源的初级绕组的集成耦合变压器; 第一集成电容电路，其可控制地耦合在主绕组和次级绕组中的一个上，并且当耦合可操作以与第一频带中的频率处的集成耦合变压器谐振时; 以及第二集成电容电路，其耦合在所述主绕组和次级绕组中的第二绕组上，所述第二集成电容电路可操作以在所述第二频带中的频率与所述集成耦合变压器谐振。 该方法在IC中，并且包括将第一频带和第二频带的输入信号提供并耦合到集成耦合变压器的初级绕组; 控制耦合到所述变压器的集成开关电容器网络以提供耦合网络，所述耦合网络在所述第一和第二频带内以第一和第二频率交替地且分别谐振，从而在所述变压器的次级绕组处选择性地提供输出信号; 并转换输出信号。

    Variable phase shifter and method
    10.
    发明授权
    Variable phase shifter and method 失效
    可变移相器和方法

    公开(公告)号：US5926052A

    公开(公告)日：1999-07-20

    申请号：US908827

    申请日：1997-08-08

    申请人： Stephen W. Dow ,  Jeffrey C. Durec ,  David K. Lovelace

    发明人： Stephen W. Dow ,  Jeffrey C. Durec ,  David K. Lovelace

    IPC分类号： H03D7/16 ,  H03H11/20 ,  H03H11/16 ,  H03K3/00

    CPC分类号： H03H11/20 ,  H03D7/165

    摘要： A circuit and method for producing a phase shifted quadrature signal (VOUT) from an in-phase signal (VIN). The in-phase signal (VIN) is applied to the control electrode of a voltage follower (121). The voltage follower (121) has a variable output resistance which combines with a capacitor (123) to delay the input signal (VIN) in accordance with the time constant formed by the variable output resistance and the capacitor (123). The variable output resistance is controlled by adjusting the bias current of the voltage follower (121) with a control signal.

    摘要翻译： 用于从同相信号（VIN）产生相移正交信号（VOUT）的电路和方法。 同相信号（VIN）被施加到电压跟随器（121）的控制电极。 电压跟随器（121）具有可变输出电阻，其与电容器（123）组合以根据由可变输出电阻和电容器（123）形成的时间常数来延迟输入信号（VIN）。 通过用控制信号调节电压跟随器（121）的偏置电流来控制可变输出电阻。