公开(公告)号：US20100148873A1

公开(公告)日：2010-06-17

申请号：US12334306

申请日：2008-12-12

申请人： Xiaoyong Li ,  Sang-Oh Lee ,  Cormac S. Conroy

发明人： Xiaoyong Li ,  Sang-Oh Lee ,  Cormac S. Conroy

IPC分类号： H03F3/16

CPC分类号： H03F1/223 ,  H03F1/3205 ,  H03F3/19 ,  H03F3/211 ,  H03F2200/168 ,  H03F2200/294 ,  H03F2200/456 ,  H03F2200/492

摘要： Techniques for improving the linearity of a cascode amplifier. In an exemplary embodiment, an auxiliary common-gate amplifier is provided in parallel with the principal cascode branch. The auxiliary common-gate amplifier samples a cascoded node in the principal cascode branch. The auxiliary common-gate amplifier generates a current which, when combined with the current generated by the principal cascode branch, cancels a distortion component to generate an output current with improved linearity characteristics. In an exemplary embodiment, a phase shifting network couples the cascoded node to the auxiliary common-gate amplifier, and may include, e.g., a capacitor coupled to an inductor.

摘要翻译： 提高共源共栅放大器线性度的技术。 在示例性实施例中，与主级联共模分支并联提供辅助共栅放大器。 辅助共栅放大器在主共线分支中采样级联节点。 辅助共栅放大器产生电流，当与由主级联共模分支产生的电流组合时，消除失真分量以产生具有改善的线性特性的输出电流。 在示例性实施例中，相移网络将级联节点耦合到辅助公共门放大器，并且可以包括例如耦合到电感器的电容器。

公开(公告)号：US08792847B2

公开(公告)日：2014-07-29

申请号：US13560097

申请日：2012-07-27

申请人： Haitao Gan ,  Xiaoyong Li

发明人： Haitao Gan ,  Xiaoyong Li

IPC分类号： H04B1/26 ,  H03D7/14

CPC分类号： H04B1/12 ,  H03D3/009 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/1491 ,  H03D7/165 ,  H03D2200/0023 ,  H03D2200/0088 ,  H04B1/16

摘要： A circuit used in a mixer configured to receive a signal made up of a relatively small modulation signal and a relatively large carrier signal is described. The mixer includes multiple switches. A balancing circuit configured to receive a supply voltage and a clocking signal is provided, and the balancing circuit provides a control signal to a switch in the mixer. The balancing circuit includes a capacitor configured to receive and selectively dissipate charge as a gate voltage along a gate path. The control signal causes switching of the switch in the mixer at times in accordance with the clocking signal according to a voltage difference value between a source voltage and the gate voltage, wherein the voltage difference value between the source voltage and the gate voltage is approximately a predetermined voltage value greater than a turn on voltage level of the switch.

摘要翻译： 描述了用于接收由相对小的调制信号和较大载波信号组成的信号的混频器中使用的电路。 混音器包括多个开关。 提供了一种被配置为接收电源电压和时钟信号的平衡电路，并且平衡电路向混频器中的开关提供控制信号。 平衡电路包括被配置为沿着栅极路径接收和选择性地耗散电荷作为栅极电压的电容器。 控制信号根据源电压和栅极电压之间的电压差值，根据时钟信号，在混频器中切换开关，其中源极电压和栅极电压之间的电压差大约为 预定的电压值大于开关的接通电压电平。

公开(公告)号：US20140030996A1

公开(公告)日：2014-01-30

申请号：US13560097

申请日：2012-07-27

申请人： Haitao Gan ,  Xiaoyong Li

发明人： Haitao Gan ,  Xiaoyong Li

IPC分类号： H04B1/26

CPC分类号： H04B1/12 ,  H03D3/009 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/1491 ,  H03D7/165 ,  H03D2200/0023 ,  H03D2200/0088 ,  H04B1/16

摘要： A circuit used in a mixer configured to receive a signal made up of a relatively small modulation signal and a relatively large carrier signal is described. The mixer includes multiple switches. A balancing circuit configured to receive a supply voltage and a clocking signal is provided, and the balancing circuit provides a control signal to a switch in the mixer. The balancing circuit includes a capacitor configured to receive and selectively dissipate charge as a gate voltage along a gate path. The control signal causes switching of the switch in the mixer at times in accordance with the clocking signal according to a voltage difference value between a source voltage and the gate voltage, wherein the voltage difference value between the source voltage and the gate voltage is approximately a predetermined voltage value greater than a turn on voltage level of the switch.

公开(公告)号：US20110193635A1

公开(公告)日：2011-08-11

申请号：US12796593

申请日：2010-06-08

申请人： Yi Zeng ,  Xiaoyong Li ,  Rahul A. Apte

发明人： Yi Zeng ,  Xiaoyong Li ,  Rahul A. Apte

IPC分类号： H03F3/04 ,  H03F1/26

CPC分类号： H03F1/0205 ,  H01B3/004 ,  H03F1/26 ,  H03F1/42 ,  H03F3/195 ,  H03F3/211 ,  H03F3/347 ,  H03F2200/294 ,  H03F2200/36 ,  H03F2200/372 ,  H03F2200/451

摘要： Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first and a second amplifier which work together to noise cancel the noise generated at an input stage circuit. The input stage circuit receives an RF signal and is characterized by a first node and a second node. The first amplifier converts a noise voltage at the first node into a first noise current at an output of the first amplifier. The second amplifier is directly coupled to the output of the first amplifier and provides noise canceling by summing the first noise current with a second noise current generated by the second amplifier as a function of the noise voltage at the second node. The proposed techniques eliminate the need for large ac coupling capacitors and reduce the die size occupied by the LNA. The elimination of ac coupling capacitors between amplification stages of the LNA allows current reuse resulting in reduced current consumption.

摘要翻译： 描述了改进具有噪声消除的低噪声放大器（LNA）的技术。 LNA包括第一和第二放大器，它们一起工作来噪声消除在输入级电路处产生的噪声。 输入级电路接收RF信号，其特征在于第一节点和第二节点。 第一放大器将第一节点处的噪声电压转换为第一放大器的输出处的第一噪声电流。 第二放大器直接耦合到第一放大器的输出，并且通过将第一噪声电流与由第二放大器产生的第二噪声电流相加作为第二节点处的噪声电压的函数来提供噪声消除。 所提出的技术消除了对大型交流耦合电容器的需要，并且减小了LNA占用的管芯尺寸。 在LNA的放大级之间消除交流耦合电容器允许电流重用，从而减少电流消耗。

公开(公告)号：US07980107B2

公开(公告)日：2011-07-19

申请号：US12286407

申请日：2008-09-29

申请人： Xiaoyong Li

发明人： Xiaoyong Li

IPC分类号： E21B23/02 ,  B21D41/02 ,  B21J7/16

CPC分类号： E21B29/10

摘要： A reducing pipe expander that applies to casing deformation restoration of deep wells such as oil field and comprises a conical-nosed enclosure, a mandrel and several steel balls. The main body of the enclosure is equipped with several radial slotted holes to nest steel balls. Held by a taper, slant or curved face against insides of the slotted holes, the steel balls move axially, overhanging the enclosure. When the deformed casing pipe or patching pipe obstructs the pipe expander from moving forward, the steel balls will move in the reverse direction of the movement of the expander to directly expand the deformed pipe. When the expander can pass through the casing pipe or patching pipe, the steel balls will be free to return to their original status.

摘要翻译： 一种适用于诸如油田等深井的套管变形恢复的还原管膨胀机，包括锥形外壳，心轴和几个钢球。 外壳的主体配有几个径向开槽孔，用于嵌入钢球。 通过锥形，倾斜或弯曲的表面抵抗开槽孔的内部，钢球轴向移动，伸出外壳。 当变形的套管或修补管阻碍扩管器向前移动时，钢球将沿着膨胀机运动的相反方向移动，以直接膨胀变形管。 当膨胀机可以穿过套管或修补管时，钢球将自由返回原来的状态。

公开(公告)号：US20110061892A1

公开(公告)日：2011-03-17

申请号：US12753266

申请日：2010-04-02

申请人： Xiangfa Ye ,  Yong Dai ,  Xiaoyong Li

发明人： Xiangfa Ye ,  Yong Dai ,  Xiaoyong Li

IPC分类号： H01B7/00

CPC分类号： H01B7/328

摘要： A cable having a current leakage detection function includes three current-carrying core wires. Each current-carrying core wire is wrapped by an insulating layer, so that the current-carrying core wires are electrically insulated from one another. The insulating layer of at least one of the current-carrying core wires is wrapped by a metal wire net. Current guiding wires in contact with the metal wire net or a single-sided conductive film laminated outside the metal wire net is utilized to achieve the effect of timely and effectively conducting a leakage current to a leakage current detection device, so as to improve the reliability of leakage current detection.

摘要翻译： 具有电流泄漏检测功能的电缆包括三个载流芯线。 每个载流芯线被绝缘层包裹，使得载流芯线彼此电绝缘。 载流芯线中的至少一个的绝缘层被金属丝网包裹。 利用与金属丝网接触的电流引导线或层叠在金属丝网外侧的单面导电膜来实现及时有效地将泄漏电流传导到泄漏电流检测装置的效果，从而提高可靠性 的漏电流检测。

公开(公告)号：US20100237942A1

公开(公告)日：2010-09-23

申请号：US12407704

申请日：2009-03-19

申请人： Xiaoyong Li ,  Rahul A. Apte

发明人： Xiaoyong Li ,  Rahul A. Apte

IPC分类号： H03F3/45

CPC分类号： H03F3/193 ,  H03F1/26 ,  H03F3/3022 ,  H03F3/45179

摘要： Techniques for integrating a common-source and common-gate amplifier topology in a single amplifier design. In one aspect, an input voltage is provided to both a common-source amplifier and a common-gate amplifier. The output voltages of the common-source amplifier and the common-gate amplifier are provided to a difference block for generating a single-ended voltage proportional to the difference between the output voltages. When applied to the design of, e.g., low-noise amplifiers (LNA's), the disclosed techniques may offer improved noise performance over the prior art.

摘要翻译： 用于在单个放大器设计中集成公共源和公共门放大器拓扑的技术。 在一个方面，输入电压被提供给共源放大器和公共门放大器。 共源极放大器和公共栅极放大器的输出电压被提供给差分块，用于产生与输出电压之间的差成比例的单端电压。 当应用于例如低噪声放大器（LNA's）的设计时，所公开的技术可以提供比现有技术更好的噪声性能。

公开(公告)号：US20100046128A1

公开(公告)日：2010-02-25

申请号：US12606405

申请日：2009-10-27

申请人： Fu Wang ,  Xiangfa Ye ,  Yong Dai ,  Xiaoyong Li

发明人： Fu Wang ,  Xiangfa Ye ,  Yong Dai ,  Xiaoyong Li

IPC分类号： H02H9/08

CPC分类号： H01H83/14 ,  H01B7/328 ,  H01H73/44 ,  H01H83/04 ,  H02H3/334

摘要： A leakage current detection interrupter with fire protection means comprising: (i) a movable assembly housing; (ii) two fixed contact holders each having a fixed contact point; (iii) ) two movable contact holders each having a fixed end and a movable end with a movable contact point; (iv) a movable assembly that moves between a first position and a second position; (v) a resetting component; (vi) a resetting component spring; (vii) an electromagnetic tripping component, which, when energized, which is responsive to a fault condition, causes the movable assembly to be in the second position from the first position; (viii) an leakage current protection circuit assembled on a printed circuit board for detecting the fault condition; and (ix) a set of three electrical wires: a first wire, a second wire, and a third wire to an appliance, wherein the first wire and the second wire are protected by a plurality of protective shields.

摘要翻译： 一种具有防火装置的泄漏电流检测中断器，包括：（i）可动组件壳体; （ii）两个具有固定接触点的固定触点支架; （iii））两个可动接触保持器，每个具有固定端和具有可动接触点的可动端; （iv）在第一位置和第二位置之间移动的可移动组件; （v）复位部件; （vi）复位部件弹簧; （vii）电磁跳闸部件，其在通电时响应于故障状态使得所述可移动组件处于从所述第一位置的第二位置; （viii）组装在印刷电路板上用于检测故障状况的漏电流保护电路; 和（ix）一组三根电线：第一线，第二线和第三线到器具，其中第一线和第二线被多个保护屏蔽保护。