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    Mixer gain calibration method and apparatus
    72.
    发明授权
    Mixer gain calibration method and apparatus 有权
    搅拌机增益校准方法和装置

    公开(公告)号：US07962116B1

    公开(公告)日：2011-06-14

    申请号：US12287928

    申请日：2008-10-15

    Applicant: King Chun Tsai ,  Lawrence Tse ,  George Chien

    Inventor： King Chun Tsai ,  Lawrence Tse ,  George Chien

    IPC: H04B1/16

    CPC classification number: H03G3/3042 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03G3/3052

    Abstract: A receiver includes a Gilbert cell mixer comprising an input transconductance stage. The input transconductance stage includes first and second transistors receiving an input signal and providing a first gain characteristic that is substantially non-linear over an operating frequency range of the receiver. Third and fourth transistors receive the input signal and provide a second gain characteristic that is substantially non-linear over the operating range of the receiver. A combined gain characteristic of the input transconductance stage is based on the first and second gain characteristics and is substantially linear over the operating frequency range of the receiver.

    Abstract translation: 接收机包括具有输入跨导级的吉尔伯特单元混合器。 输入跨导级包括接收输入信号的第一和第二晶体管，并且在接收器的工作频率范围上提供基本上非线性的第一增益特性。 第三和第四晶体管接收输入信号并提供在接收器的工作范围上基本上非线性的第二增益特性。 输入跨导级的组合增益特性基于第一和第二增益特性，并且在接收器的工作频率范围上基本上是线性的。

    Multiplier, Mixer, Modulator, Receiver and Transmitter
    74.
    发明申请
    Multiplier, Mixer, Modulator, Receiver and Transmitter 审中-公开
    乘法器，混频器，调制器，接收器和发送器

    公开(公告)号：US20110050319A1

    公开(公告)日：2011-03-03

    申请号：US12676150

    申请日：2008-07-29

    Applicant: Alan Chi Wai Wong

    Inventor： Alan Chi Wai Wong

    IPC: G06G7/16

    CPC classification number: H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D7/165 ,  H03D2200/0025 ,  H03D2200/0033

    Abstract: A multiplier is provided, for example, for use as a mixer in a modulator of a radio frequency transmitter. The multiplier multiplies a first alternating signal of constant amplitude by a second signal, for example, in the form of a carrier wave from a local oscillator. The multiplier comprises a transconductance stage for converting the first signal to a differential output current and a current switching stage for switching the differential output current in accordance with the second signal. The transconductance stage comprises a plurality of offset pairs of transistors, whose inputs and outputs are connected in parallel. The switching stage comprises cross-coupled pairs of transistors which, together with the transconductance stage, form a Gilbert cell. The relative gains of the transistors of each offset pair are such that a minimum in the third harmonic distortion characteristic of the multiplier occurs substantially at the amplitude of the first signal.

    Abstract translation: 提供乘法器，例如用作射频发射机的调制器中的混频器。 乘法器将恒定幅度的第一交替信号乘以第二信号，例如以来自本地振荡器的载波的形式。 乘法器包括用于将第一信号转换为差分输出电流的跨导级和用于根据第二信号切换差动输出电流的电流开关级。 跨导级包括多个晶体管的偏移对，其输入和输出并联连接。 开关级包括交叉耦合的晶体管对，其与跨导级一起形成吉尔伯特电池。 每个偏移对的晶体管的相对增益使得乘法器的三次谐波失真特性中的最小值基本上在第一信号的幅度上发生。

    Controllable mixer
    75.
    发明授权
    Controllable mixer 有权
    可控搅拌机

    公开(公告)号：US07865157B2

    公开(公告)日：2011-01-04

    申请号：US10577833

    申请日：2004-09-13

    Applicant: Herbert Peusens ,  Klaus Clemens

    Inventor： Herbert Peusens ,  Klaus Clemens

    IPC: H04B1/18

    CPC classification number: H04B1/109 ,  H03D7/12 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0025 ,  H03D2200/0043

    Abstract: A heterodyne receiver has a mixer with at least one transistor whose operating point can be varied dynamically. The quality of the output signal from the mixer is assessed in order to control the operating point. The operating point is set such that the collector current is increased when the intermodulation interference is high, thus improving the intermodulation resistance. The collector current is reduced when the intermodulation interference is low, thus reducing the transistor noise. Furthermore, the current drawn is reduced in this situation. The circuit and the method are particularly suitable for RF receivers without tunable input filters, and for receivers in which the power consumption must be low.

    Abstract translation: 外差接收器具有具有至少一个晶体管的混频器，其工作点可以动态变化。 评估来自混合器的输出信号的质量，以控制工作点。 设定工作点，使得当互调干涉高时集电极电流增加，从而提高互调电阻。 当互调干扰低时，集电极电流降低，从而降低晶体管噪声。 此外，在这种情况下，减少了当前的绘制。 该电路和方法特别适用于不具有可调谐输入滤波器的RF接收机以及功耗必须低的接收机。

    Low voltage mixer with improved gain and linearity
    76.
    发明授权
    Low voltage mixer with improved gain and linearity 有权
    具有改善增益和线性度的低压混频器

    公开(公告)号：US07816970B2

    公开(公告)日：2010-10-19

    申请号：US12431078

    申请日：2009-04-28

    Applicant: Deok-Hwan Kim

    Inventor： Deok-Hwan Kim

    IPC: G06G7/12

    CPC classification number: H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03D2200/0084

    Abstract: A frequency mixing apparatus with improved voltage gain and linearity is provided. The frequency mixing apparatus includes a transconductor, a separator, and a switching unit. A voltage gain of the transconductor is controllable, and the transconductor converts a Radio Frequency (RF) signal into a current signal under control of a self bias. The separator transfers the current signal to the switching unit. The switching unit outputs a signal having a frequency corresponding to one of a sum and a difference of a frequency of the RF signal and a frequency of a Local Oscillation (LO) signal by performing a switching operation according to the LO signal.

    Abstract translation: 提供了具有改善的电压增益和线性度的混频装置。 该混频装置包括跨导体，分离器和开关单元。 跨导体的电压增益是可控的，并且跨导体在自偏压的控制下将射频（RF）信号转换成电流信号。 分离器将电流信号传送到开关单元。 切换单元通过根据LO信号执行切换操作，输出具有与RF信号的频率和频率的差的频率对应的频率的本地振荡（LO）信号的频率的信号。

    METHOD AND ARRANGEMENT FOR A LINEAR MIXER
    78.
    发明申请
    METHOD AND ARRANGEMENT FOR A LINEAR MIXER 有权
    线性混合器的方法和布置

    公开(公告)号：US20100141325A1

    公开(公告)日：2010-06-10

    申请号：US12520824

    申请日：2006-12-22

    Applicant: Mingquan Bao ,  Yinggang Li

    Inventor： Mingquan Bao ,  Yinggang Li

    IPC: G06G7/12

    CPC classification number: H03D7/1425 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0033 ,  H03D2200/0043

    Abstract: A combination mixer arrangement comprising a first mixer and a second mixer coupled in parallel between first and second input ports and an output port. The mixers are arranged to be driven simultaneously by an input signal provided at the second input port. They are de-coupled, so a bias voltage applied at the first input port provides dc bias simultaneously for the mixers to enable gain expansion of the first mixer responsive to an increase in said input signal and thereby an improved linearity for the combination mixer arrangement.

    Abstract translation: 一种组合混合器装置，包括在第一和第二输入端口之间并联耦合的第一混频器和第二混频器以及输出端口。 混合器被布置成通过设置在第二输入端口处的输入信号同时驱动。 它们被去耦合，因此在第一输入端口处施加的偏置电压同时为混频器提供直流偏置，以响应于所述输入信号的增加而使得第一混频器的增益扩展，从而提高组合混频器装置的线性度。

    Mixer with Feedback
    80.
    发明申请
    Mixer with Feedback 审中-公开
    混合器与反馈

    公开(公告)号：US20100112972A1

    公开(公告)日：2010-05-06

    申请号：US12685873

    申请日：2010-01-12

    Applicant: Sven Mattisson

    Inventor： Sven Mattisson

    IPC: H04B1/26

    CPC classification number: H03D7/1441 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043

    Abstract: A method and system for increasing the compression point of a receiver by deriving a feedback signal from mixer output signals. The feedback signal prevents the receiver from going into compression on strong out-of-band or blocking signals, while enhancing the receiver gain at the desired frequency. The desired frequency coincides with the local oscillator (LO) signal and is therefore particularly applicable for, but not limited to, homodyne receivers where selectivity can be made quite narrowband. Since the selectivity is coupled to the LO, a tunable receiver may be achieved that enables selectivity over a wide range of input frequencies.

    Abstract translation: 一种用于通过从混频器输出信号导出反馈信号来增加接收机的压缩点的方法和系统。 反馈信号防止接收机在强大的带外或阻塞信号上进行压缩，同时在所需频率下增强接收机增益。 期望的频率与本地振荡器（LO）信号一致，因此特别适用于但不限于可以使选择性相当窄带的零差接收机。 由于选择性耦合到LO，所以可以实现可调谐的接收器，其可以在宽范围的输入频率上实现选择性。

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