A CRYSTAL OSCILLATOR WITH A NOISELESS AND AMPLITUDE BASED START UP CONTROL LOOP
    71.
    发明申请
    A CRYSTAL OSCILLATOR WITH A NOISELESS AND AMPLITUDE BASED START UP CONTROL LOOP 审中-公开
    具有无噪声和振幅基于启动控制环的水晶振荡器

    公开(公告)号:WO2014055379A1

    公开(公告)日:2014-04-10

    申请号:PCT/US2013/062520

    申请日:2013-09-30

    Inventor: THAM, KhongMeng

    Abstract: A large gain is used to start up the oscillation of the crystal quickly. A control circuit disables a low resistance path based on the measured amplitude to reduce the power dissipation specification of the crystal. Another technique introduces a mixed-signal controlled power supply multi-path resistive array which tailors the maximum current to the crystal. A successive approximation register converts the amplitude into several partitions and enables/disables one of several power routing paths to the inverter of the oscillator. This allows a better match between the crystal selected by the customer and the on-chip drive circuitry to power up the oscillator without stressing the crystal. The "1/f" noise of the oscillator circuit is minimized by operating transistors in the triode region instead of the linear region.

    Abstract translation: 使用大的增益快速启动晶体振荡。 控制电路基于测量的振幅来禁用低电阻路径,以减少晶体的功耗规格。 另一种技术引入了一种混合信号控制电源多路径电阻阵列,可以调整晶体的最大电流。 逐次逼近寄存器将振幅转换成几个分区,并使能/禁用振荡器的反相器的几个电源路由路径之一。 这允许由客户选择的晶体和片上驱动电路之间更好地匹配,以在不强调晶体的情况下加电振荡器。 通过在三极管区域中操作晶体管而不是线性区域来使振荡器电路的“1 / f”噪声最小化。

    METHOD AND APPARATUS FOR AN ACTIVE NEGATIVE-CAPACITOR CIRCUIT
    72.
    发明申请
    METHOD AND APPARATUS FOR AN ACTIVE NEGATIVE-CAPACITOR CIRCUIT 审中-公开
    用于有源负电容电路的方法和装置

    公开(公告)号:WO2014036543A1

    公开(公告)日:2014-03-06

    申请号:PCT/US2013/057759

    申请日:2013-09-02

    Inventor: DAI, Dai

    CPC classification number: H03M1/0818 H03M1/0809 H03M1/124 H03M1/365

    Abstract: The differential output of a Programmable Gain Amplifier (PGA) is loaded by the input differential gate capacitance of a plurality of Analog to Digital convertors (ADC) comparators and the differential metal layer traces to interconnect these comparators to the PGA. The differential capacitive load presented to the PGA is quite large and reduces the bandwidth of this interconnect between the PGA and ADC. To overcome the performance degradation due to the differential capacitive load, an active negative-capacitor circuit cancels the effect of the large input capacitance of the ADC comparators. This cancelation extends the gain characteristics of the interconnect between the PGA's output and the inputs of the first stage of the comparators. The active negative-capacitance is comprised of a cross pair NMOS with a capacitor connecting their sources where each NMOS is biased by a current source.

    Abstract translation: 可编程增益放大器(PGA)的差分输出由多个模数转换器(ADC)比较器的输入差分栅极电容和差分金属层迹线加载,以将这些比较器与PGA互连。 提供给PGA的差分电容性负载相当大,并降低了PGA和ADC之间的这种互连的带宽。 为了克服由于差分电容性负载引起的性能下降,有源负电容电路消除了ADC比较器的大输入电容的影响。 该取消扩展了PGA输出与比较器的第一级的输入之间的互连的增益特性。 有源负电容由交叉对NMOS组成,其中电容器连接其源极,其中每个NMOS由电流源偏置。

    METHOD AND APPARATUS FOR A 60 GHZ ENDFIRE ANTENNA
    73.
    发明申请
    METHOD AND APPARATUS FOR A 60 GHZ ENDFIRE ANTENNA 审中-公开
    60 GHZ EndFIRE天线的方法和装置

    公开(公告)号:WO2014015006A1

    公开(公告)日:2014-01-23

    申请号:PCT/US2013/050836

    申请日:2013-07-17

    Inventor: YANG, HungYu

    CPC classification number: H01Q1/007 H01Q1/2283 H01Q1/38 H01Q1/521

    Abstract: The LTCC (Low Temperature Co-fired Ceramic) substrate is used to form an antenna structure operating at 60 GHz. The dielectric constant is high and ranges from 5 to 8. The substrate thickness is fabricated with a thickness between 360μm to 700μm. The large dielectric constant and large thickness of the substrate creates a guiding wave in the LTCC that forms an endfire antenna. A high gain signal of 10 dB in a preferred direction occurs by placing the microstrip fed dipole structure in the center of the LTCC substrate creating a dielectric cavity resonator. The creation of a slot in the LTCC substrate between the two microstrip fed dipole structures eliminates beam tilting and allows for the two microstrip fed dipole structures to reduce the coupling to each other thereby providing substantially two isolated endfire antennas. These antennas can be used as multiple receive or transmit antennas.

    Abstract translation: LTCC(低温共烧陶瓷)衬底用于形成在60GHz工作的天线结构。 介电常数高,范围为5〜8。基板厚度制成厚度在360〜700μm之间。 衬底的大介电常数和大厚度在LTCC中产生形成端射天线的引导波。 通过将微带馈电偶极子结构放置在LTCC衬底的中心,产生电介质腔谐振器,从而发生优选方向上10dB的高增益信号。 在两个微带馈电偶极结构之间的LTCC衬底中创建一个槽消除了波束倾斜,并且允许两个微带馈电偶极结构减少彼此的耦合,从而提供基本上两个隔离的端射天线。 这些天线可以用作多个接收或发射天线。

    AN INJECTION LOCKED DIVIDER WITH INJECTION POINT LOCATED AT A TAPPED INDUCTOR
    74.
    发明申请
    AN INJECTION LOCKED DIVIDER WITH INJECTION POINT LOCATED AT A TAPPED INDUCTOR 审中-公开
    带注射点的注射锁定分支器位于带状电感器

    公开(公告)号:WO2013085971A1

    公开(公告)日:2013-06-13

    申请号:PCT/US2012/067908

    申请日:2012-12-05

    Inventor: SOE, Zaw

    CPC classification number: H03D7/1441 H03D7/1466 H03F1/223 H03F3/193

    Abstract: Injection locked dividers provide a divided clock signal after being driven by a injected clock signal that is a multiple of the divided clock signal. At injected clock signal at 60 GHz generates a differential 30 GHz clock signal. One innovative construction of the injection locked oscillator reduces the internal capacitive at a node by associating the parasitic capacitance at this node with the inductors of the tapped inductor resonant circuit. This provides more energy flow in the injection pulses applied to the legs of the injection locked circuit providing an increase locking range.

    Abstract translation: 注入锁定分频器在被分配的时钟信号的倍数的注入时钟信号驱动之后提供分频时钟信号。 在60 GHz的注入时钟信号产生差分30 GHz时钟信号。 注入锁定振荡器的一个创新结构通过将该节点处的寄生电容与抽头电感谐振电路的电感相关联来减少节点处的内部电容。 这提供了施加到注射锁定电路的腿部的注射脉冲中提供更多的能量流,从而提供增加的锁定范围。

    SYSTEMS AND METHODS FOR NETWORKED WEARABLE MEDICAL SENSORS
    75.
    发明申请
    SYSTEMS AND METHODS FOR NETWORKED WEARABLE MEDICAL SENSORS 审中-公开
    网络医疗传感器的系统和方法

    公开(公告)号:WO2011153289A3

    公开(公告)日:2012-05-03

    申请号:PCT/US2011038827

    申请日:2011-06-01

    Abstract: A medical sensor system comprises a gateway comprising a wideband receiver and a narrow band transmitter, the each gateway configured to receive a wideband positioning frame using the wideband receiver from one or more wearable sensors and to transmit acknowledgement frames using the narrow band transmitter that include timing and control data for use by the sensors to establish timing for transmission of the positioning frame; and at least one wearable sensor comprising a wideband transmitter and a narrow band receiver, the sensor configured to transmit a sensor data frame to the gateway using the wideband transmitter and to receive an acknowledgement frame from the gateway using the narrow band receiver, extract timing and control information from the frame, and adjust the timing and synchronization of the wideband transmitter using the timing and control information.

    Abstract translation: 医疗传感器系统包括包括宽带接收机和窄带发射机的网关,每个网关被配置为使用来自一个或多个可佩戴传感器的宽带接收机接收宽带定位帧,并且使用包括定时的窄带发射机发送确认帧 以及由传感器使用的控制数据,以建立定位框架的传输定时; 以及包括宽带发射机和窄带接收机的至少一个可佩戴传感器,所述传感器被配置为使用所述宽带发射机向所述网关发送传感器数据帧,并且使用所述窄带接收机从所述网关接收确认帧,提取定时和 控制来自帧的信息,并使用定时和控制信息来调整宽带发射机的定时和同步。

    SYSTEMS AND METHODS FOR NETWORKED WEARABLE MEDICAL SENSORS
    76.
    发明申请
    SYSTEMS AND METHODS FOR NETWORKED WEARABLE MEDICAL SENSORS 审中-公开
    网络医疗传感器的系统和方法

    公开(公告)号:WO2011153289A2

    公开(公告)日:2011-12-08

    申请号:PCT/US2011/038827

    申请日:2011-06-01

    Abstract: A medical sensor system comprises a gateway comprising a wideband receiver and a narrow band transmitter, the each gateway configured to receive a wideband positioning frame using the wideband receiver from one or more wearable sensors and to transmit acknowledgement frames using the narrow band transmitter that include timing and control data for use by the sensors to establish timing for transmission of the positioning frame; and at least one wearable sensor comprising a wideband transmitter and a narrow band receiver, the sensor configured to transmit a sensor data frame to the gateway using the wideband transmitter and to receive an acknowledgement frame from the gateway using the narrow band receiver, extract timing and control information from the frame, and adjust the timing and synchronization of the wideband transmitter using the timing and control information.

    Abstract translation: 医疗传感器系统包括包括宽带接收机和窄带发射机的网关,每个网关被配置为使用来自一个或多个可佩戴传感器的宽带接收机接收宽带定位帧,并且使用包括定时的窄带发射机发送确认帧 以及由传感器使用的控制数据,以建立定位框架的传输定时; 以及包括宽带发射机和窄带接收机的至少一个可佩戴传感器,所述传感器被配置为使用所述宽带发射机向所述网关发送传感器数据帧,并且使用所述窄带接收机从所述网关接收确认帧,提取定时和 控制来自帧的信息,并使用定时和控制信息来调整宽带发射机的定时和同步。

    METHOD AND APPARATUS FOR MILLIMETER WAVE ANTENNA ARRAY

    公开(公告)号:US20210098892A1

    公开(公告)日:2021-04-01

    申请号:US17001451

    申请日:2020-08-24

    Inventor: Guang-Fu Cheng

    Abstract: An antenna array system and a method for making the antenna system. The system includes at least two antenna elements serving as transmitter elements, and at least two antenna elements serving as receiver elements. Each of the transmitter antenna and receiver antenna elements include a pair of curved arms, wherein a first arm in the pair of curved arms is configured to be connected from a signal trace of the antenna system. The second arm in the pair of curved arms is configured to be connected to a ground plane.

    Method and apparatus for an active negative-capacitor circuit to cancel the input capacitance of comparators

    公开(公告)号:US10200024B2

    公开(公告)日:2019-02-05

    申请号:US15652934

    申请日:2017-07-18

    Inventor: Dai Dai

    Abstract: A circuit comprises a first amplifier coupled to a first and a second node; a differential capacitive load coupled to the first and the second node, the differential capacitive load coupled between drains of transistors in a cross coupled transistor circuit; a current mirror coupled to a source of each transistor; and a capacitor coupled between the sources of the transistors. A plurality of amplifiers can be coupled to the differential capacitive load, wherein each amplifier comprises a clock-less pre-amplifier of a comparator. The amplifiers may be abutted to one another such that an active transistor of a first differential stage in a first amplifier behaves as a dummy transistor for an adjacent differential stage in a second amplifier.

    Method and apparatus to detect LO leakage and image rejection using a single transistor

    公开(公告)号:US10103757B2

    公开(公告)日:2018-10-16

    申请号:US15505444

    申请日:2015-08-25

    Abstract: 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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