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    Gilbert mixer with negative gm to increase NMOS mixer conversion
    14.
    发明授权
    Gilbert mixer with negative gm to increase NMOS mixer conversion 有权
    吉尔伯特混频器采用负gm来增加NMOS混频器的转换

    公开(公告)号：US08836407B1

    公开(公告)日：2014-09-16

    申请号：US13789681

    申请日：2013-03-08

    Applicant: Tensorcom, Inc.

    Inventor： Zaw Soe ,  Tham KhongMeng

    IPC: G06F7/44 ,  G06G7/16

    CPC classification number: G06G7/16 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0019

    Abstract: A cross coupled NMOS transistors providing a negative gm transistor feedback allows a mixer to saturate at a reduced input signal swing voltage when compared to a conventional mixer allowing the mixer to enter into the current mode operation at a reduced signal input voltage range. The linearity of the baseband signal path can be traded against the mixer gain and is improved if the signal swing in the baseband signal path is reduced. The input mixer transistors operate in the saturated mode at a reduced input signal swing voltage causing the power efficiency of the system to increase since the transmit chain operates at a class-D power efficient. Efficiency is very important in mobile applications to save and extend the battery power of a mobile phone providing a better utilization of the available power since most of that power is supplied to the energy of the outgoing modulated signal.

    Abstract translation: 提供负gm晶体管反馈的交叉耦合NMOS晶体管使混频器能够与传统的混频器相比，作为降低的输入信号摆幅电压饱和，从而允许混频器在降低的信号输入电压范围内进入电流模式操作。 基带信号路径的线性度可以抵抗混频器增益进行交易，如果基带信号路径中的信号摆幅减小，则可以得到改善。 输入混频器晶体管以降低的输入信号摆幅电压在饱和模式下工作，导致系统的功率效率增加，因为发射链以D类功率有效工作。 在移动应用中，效率对于节省和扩展移动电话的电池电力是非常重要的，其提供了对可用功率的更好的利用，因为大部分功率被提供给输出调制信号的能量。

    Direct coupled biasing circuit for high frequency applications
    15.
    发明授权
    Direct coupled biasing circuit for high frequency applications 有权

    公开(公告)号：US10476486B2

    公开(公告)日：2019-11-12

    申请号：US15646776

    申请日：2017-07-11

    Applicant: Tensorcom, Inc.

    Inventor： Zaw Soe ,  KhongMeng Tham

    IPC: H03K3/012 ,  H03K17/56 ,  H01Q1/50 ,  H04B5/00 ,  G05F3/16

    Abstract: This invention eliminates the need for “capacitor coupling” or “transformer coupling,” and the associated undesirable parasitic capacitance and inductance associated with these coupling techniques when designing high frequency (˜60 GHz) circuits. At this frequency, the distance between two adjacent stages needs to be minimized. A resonant circuit in series with the power or ground leads is used to isolate a biasing signal from a high frequency signal. The introduction of this resonant circuit allows a first stage to be “directly coupled” to a next stage using a metallic trace. The “direct coupling” technique passes both the high frequency signal and the biasing voltage to the next stage. The “direct coupling” approach overcomes the large die area usage when compared to either the “AC coupling” or “transformer coupling” approach since neither capacitors nor transformers are required to transfer the high frequency signals between stages.

    Method and apparatus of an input resistance of a passive mixer to broaden the input matching bandwidth of a common source/gate LNA
    16.
    发明授权
    Method and apparatus of an input resistance of a passive mixer to broaden the input matching bandwidth of a common source/gate LNA 有权

    公开(公告)号：US10461703B2

    公开(公告)日：2019-10-29

    申请号：US15884966

    申请日：2018-01-31

    Applicant: Tensorcom, Inc.

    Inventor： Zaw Soe

    IPC: H04B1/16 ,  H03F3/19 ,  H03F1/22 ,  H03F1/42 ,  H03F3/387 ,  H03F3/193 ,  H03D7/12 ,  H03D7/14 ,  H03D7/16 ,  H03F3/45 ,  H04L27/38

    Abstract: A common-source Low Noise Amplifier (LNA) comprises a first spiral inductor coupled to a source of a first transistor, a second spiral inductor coupled to a drain of a second transistor, and a third inductor connecting the first transistor to the second transistor. The third inductor is configurable to enable a first capacitance to be coupled in parallel to form a bandpass filter. The first spiral inductor is configurable to enable a second capacitance to be coupled in parallel to form a resonant circuit. A variation of the LNA further includes a drain of a third transistor coupled to a gate of a fourth transistor with a first width, a source of the third transistor coupled to the resonant circuit, and an oscillator clock configured to operate at a first frequency that enables the third transistor, wherein the third transistor presents a first impedance to the resonant circuit, causing the resonant circuit to have a first bandwidth.

    Method and apparatus to detect LO leakage and image rejection using a single transistor
    20.
    发明授权
    Method and apparatus to detect LO leakage and image rejection using a single transistor 有权
    使用单个晶体管检测LO泄漏和图像抑制的方法和装置

    公开(公告)号：US09450537B2

    公开(公告)日：2016-09-20

    申请号：US14467075

    申请日：2014-08-25

    Applicant: Tensorcom, Inc.

    Inventor： KhongMeng Tham ,  Huainan Ma ,  Zaw Soe ,  Ricky Lap Kei Cheung

    IPC: G06G7/12 ,  H03D3/00 ,  H03D7/16

    CPC classification number: H04B1/0475 ,  H03C2200/0058 ,  H03D3/008 ,  H03D3/009 ,  H03D7/125 ,  H03D7/165 ,  H04B1/04 ,  H04B1/0458 ,  H04B2001/0408

    Abstract: LO leakage and Image are common and undesirable effects in typical transmitters. Typically, thirty complex hardware and algorithms are used to calibrate and reduce these two impairments. A single transistor that draws essentially no de current and occupies a very small area, is used to detect the LO leakage and Image Rejection signals. The single transistor operating as a square law device, is used to mix the signals at the input and output ports of the power amplifier (PA). The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

    Abstract translation: LO泄漏和图像在典型的发射器中是常见的和不良影响。 通常，使用三十个复杂的硬件和算法来校准和减少这两个损伤。 基本上没有去电流并占据非常小的面积的单个晶体管用于检测LO泄漏和图像抑制信号。 作为平方律器件工作的单个晶体管用于混合功率放大器（PA）输入和输出端口的信号。 由单个晶体管产生的混合信号可以同时校准LO泄漏和图像抑制。

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