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1. 发明申请

US20190007076A1 METHOD AND APPARATUS TO DETECT LO LEAKAGE AND IMAGE REJECTION USING A SINGLE TRANSISTOR 审中-公开
公开(公告)号：US20190007076A1
公开(公告)日：2019-01-03
申请号：US16122669
申请日：2018-09-05
申请人： Tensorcom, Inc.
发明人： KhongMeng Tham , Huainan Ma , Zaw Soe , Ricky Lap Kei Cheung
IPC分类号： H04B1/04 , H03D7/16 , H03D3/00 , H03D7/12
摘要： Local oscillator (LO) leakage and Image are common and undesirable effects in typical transmitters. Typically, fairly complex hardware and algorithms are used to calibrate and reduce these impairments. A single transistor that draws essentially no dc current and occupies a very small area detects the LO leakage and Image signals. The single transistor operating as a square-law device is used to mix the signals at the input and output ports of a power amplifier. The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

2. 发明申请

US20180183391A1 Method and Apparatus of an Input Resistance of a Passive Mixer to Broaden the Input Matching Bandwidth of a Common Source/Gate LNA 审中-公开
公开(公告)号：US20180183391A1
公开(公告)日：2018-06-28
申请号：US15884966
申请日：2018-01-31
申请人： Tensorcom, Inc.
发明人： Zaw Soe
IPC分类号： H03F1/42 , H03F3/387 , H03D7/14 , H03D7/16 , H03F1/22 , H03F3/45 , H03D7/12 , H03F3/193
CPC分类号： H03F1/42 , H03D7/125 , H03D7/1441 , H03D7/1466 , H03D7/165 , H03F1/223 , H03F3/193 , H03F3/387 , H03F3/45071 , H03F3/45179 , H03F2200/108 , H03F2200/294 , H03F2200/451 , H03F2200/492 , H03F2200/72 , H03F2200/75 , H04L27/38
摘要： 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.

3. 发明申请

US20160156320A1 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
标题翻译：无源混频器的输入电阻的方法和装置，以扩大公共源/门LNA的输入匹配带宽
公开(公告)号：US20160156320A1
公开(公告)日：2016-06-02
申请号：US15016714
申请日：2016-02-05
申请人： Tensorcom, Inc.
发明人： Zaw Soe
IPC分类号： H03F1/42 , H03F3/45 , H03F3/193
CPC分类号： H03F1/42 , H03D7/125 , H03D7/1441 , H03D7/1466 , H03D7/165 , H03F1/223 , H03F3/193 , H03F3/387 , H03F3/45071 , H03F3/45179 , H03F2200/108 , H03F2200/294 , H03F2200/451 , H03F2200/492 , H03F2200/72 , H03F2200/75 , H04L27/38
摘要： A cascode amplifier circuit 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; a third inductor connecting the first transistor to the second transistor; a first capacitor coupled in parallel to the third inductor forming a bandpass filter; and a second capacitor coupled in parallel to the second spiral inductor forming a resonant circuit, wherein the resonant circuit oscillates at a center frequency.
摘要翻译：一个共源共栅放大器电路包括耦合到第一晶体管源极的第一螺旋电感器; 耦合到第二晶体管的漏极的第二螺旋电感器; 将所述第一晶体管连接到所述第二晶体管的第三电感器; 与形成带通滤波器的第三电感器并联耦合的第一电容器; 以及并联耦合到形成谐振电路的第二螺旋电感器的第二电容器，其中所述谐振电路以中心频率振荡。

4. 发明授权

US09088308B2 Frequency pulling reduction in wide-band direct conversion transmitters 有权
标题翻译：宽带直接转换发射机降频
公开(公告)号：US09088308B2
公开(公告)日：2015-07-21
申请号：US13789682
申请日：2013-03-08
申请人： Tensorcom, Inc.
发明人： Zaw Soe
IPC分类号： H04L27/00 , H04B1/02
CPC分类号： H04B1/02 , H03D7/165
摘要： In an up-converter path of a transmitter, wide-band signal system like direct conversion WiGig, a high pass filter (HPF) is placed in the baseband path after the low pass filter (LPF) but before the mixers. The baseband signal of WiGig can have a bandwidth of 800 MHz. The HPF removes the frequencies from 0-40 MHz from the baseband signal and degrades the overall signal of the baseband by a dB or so. However, the frequency pulling is significantly reduced since oscillator frequency and Radio frequency (RF) transmitter frequencies after conversion become further separated when compared a system using to the conventional approach. This causes the injected signal to fall outside the locking range of the oscillator. The concern of substrate coupling is reduced and allows for a reduction in the physical distance between the oscillator and the mixer and reduces a shift in the desired target frequency of operation.
摘要翻译：在发射机的上转换器路径中，像直接转换WiGig这样的宽带信号系统，高通滤波器（HPF）在低通滤波器（LPF）之后但在混频器之前被置于基带路径中。 WiGig的基带信号可以具有800 MHz的带宽。 HPF从基带信号中删除0-40 MHz的频率，并将基带的整体信号降低dB左右。然而，与使用传统方法的系统进行比较时，振荡器频率和转换后的射频（RF）发射机频率变得更加分离时，频率牵引显着减少。这会使注入的信号落在振荡器的锁定范围之外。衬底耦合的问题被减少并且允许减小振荡器和混频器之间的物理距离，并减少所需目标操作频率的偏移。

5. 发明授权

US10734957B2 High linearly WiGig baseband amplifier with channel select filter 有权
公开(公告)号：US10734957B2
公开(公告)日：2020-08-04
申请号：US16352575
申请日：2019-03-13
申请人： Tensorcom, Inc.
发明人： Zaw Soe , Kevin Jing , Steve Gao
IPC分类号： H03G5/28 , H03H11/12 , H03G1/00 , H03F3/45
摘要： A circuit comprises a Sallen-Key filter, which includes a source follower that implements a unity-gain amplifier; and a programmable-gain amplifier coupled to the Sallen-Key filter. The circuit enables programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier, which decouples the bandwidth of the circuit from its gain settings. The programmable-gain amplifier can comprise a differential voltage-to-current converter, a current mirror pair, and programmable output gain stages. The Sallen-Key filter and at least one branch in the programmable-gain amplifier can comprise transistors arranged in identical circuit configurations.

6. 发明授权

US10277182B2 High linearly WiGig baseband amplifier with channel select filter 有权
公开(公告)号：US10277182B2
公开(公告)日：2019-04-30
申请号：US15833458
申请日：2017-12-06
申请人： Tensorcom, Inc.
发明人： Zaw Soe , Kevin Jing , Steve Gao
IPC分类号： H03G1/00 , H03H11/12 , H03F3/45 , H03G5/28
摘要： A circuit comprises a Sallen-Key filter, which includes a source follower that implements a unity-gain amplifier; and a programmable-gain amplifier coupled to the Sallen-Key filter. The circuit enables programmable gain via adjustment to a current mirror copying ratio in the programmable-gain amplifier, which decouples the bandwidth of the circuit from its gain settings. The programmable-gain amplifier can comprise a differential voltage-to-current converter, a current mirror pair, and programmable output gain stages. The Sallen-Key filter and at least one branch in the programmable-gain amplifier can comprise transistors arranged in identical circuit configurations.

7. 发明授权

US09793880B2 Direct coupled biasing circuit for high frequency applications 有权
公开(公告)号：US09793880B2
公开(公告)日：2017-10-17
申请号：US14828955
申请日：2015-08-18
申请人： Tensorcom, Inc.
发明人： Zaw Soe , KhongMeng Tham
IPC分类号： H03K3/012 , H01Q1/50 , H03K17/56 , G05F3/16 , H04B5/00
CPC分类号： H03K3/012 , G05F3/16 , H01Q1/50 , H03K17/56 , H04B5/0075
摘要： 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.

8. 发明申请

US20140254710A1 Frequency Pulling Reduction in Wide-Band Direct Conversion Transmitters 有权
标题翻译：宽带直接转换发射机中的降频
公开(公告)号：US20140254710A1
公开(公告)日：2014-09-11
申请号：US13789682
申请日：2013-03-08
申请人： TENSORCOM, INC.
发明人： Zaw Soe
IPC分类号： H04L25/03
CPC分类号： H04B1/02 , H03D7/165
摘要： In an up-converter path of a transmitter, wide-band signal system like direct. conversion WiGig, a high pass filter (HPF) is placed in the baseband path after the low pass filter (LPF) but before the mixers. The baseband signal of WiGig can have a bandwidth of 800 MHz. The HPF removes the frequencies from 0-40 MHz from the baseband signal and degrades the overall signal of the baseband by a dB or so. However, the frequency pulling is significantly reduced since oscillator frequency and Radio frequency (RF) transmitter frequencies after conversion become further separated when compared a system using to the conventional approach. This causes the injected signal to fall outside the locking range of the oscillator. The concern of substrate coupling is reduced and allows for a reduction in the physical distance between the oscillator and the mixer and reduces a shift in the desired target frequency of operation.
摘要翻译：在发射机的上变频器路径中，像直接的宽带信号系统。转换WiGig，高通滤波器（HPF）放置在低通滤波器（LPF）之后但混频器之前的基带路径中。 WiGig的基带信号可以具有800 MHz的带宽。 HPF从基带信号中删除0-40 MHz的频率，并将基带的整体信号降低dB左右。然而，与使用传统方法的系统进行比较时，振荡器频率和转换后的射频（RF）发射机频率变得更加分离时，频率牵引显着减少。这会使注入的信号落在振荡器的锁定范围之外。衬底耦合的问题被减少并且允许减小振荡器和混频器之间的物理距离，并减少所需目标操作频率的偏移。

9. 发明申请

US20140253216A1 GILBERT MIXER WITH NEGATIVE GM TO INCREASE NMOS MIXER CONVERSION 有权
标题翻译： GILBERT混合器与负极GM增加NMOS混合器转换
公开(公告)号：US20140253216A1
公开(公告)日：2014-09-11
申请号：US13789681
申请日：2013-03-08
申请人： TENSORCOM, INC.
发明人： Zaw Soe , Tham KhongMeng
IPC分类号： G06G7/16
CPC分类号： G06G7/16 , H03D7/1441 , H03D7/1458 , H03D7/165 , H03D2200/0019
摘要： 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.
摘要翻译：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。

10. 发明授权

US10103757B2 Method and apparatus to detect LO leakage and image rejection using a single transistor 有权
公开(公告)号：US10103757B2
公开(公告)日：2018-10-16
申请号：US15505444
申请日：2015-08-25
申请人： Tensorcom, Inc.
发明人： KhongMeng Tham , Huainan Ma , Zaw Soe , Ricky Lap Kei Cheung
IPC分类号： H04B1/04 , H03D7/12
摘要： Local oscillator (LO) leakage and Image are common and undesirable effects in typical transmitters. Typically, fairly complex hardware and algorithms are used to calibrate and reduce these impairments. A single transistor that draws essentially no dc current and occupies a very small area detects the LO leakage and Image signals. The single transistor operating as a square-law device is used to mix the signals at the input and output ports of a power amplifier. The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

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