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    • 2. 发明授权
    • Dynamic LNA switch points based on channel conditions
    • 基于通道条件的动态LNA切换点
    • US08521198B2
    • 2013-08-27
    • US11560790
    • 2006-11-16
    • Steven C. CiccarelliBrian GeorgeSoon-Seng Lau
    • Steven C. CiccarelliBrian GeorgeSoon-Seng Lau
    • H04B15/00
    • H04B1/109H03F3/72H03F2200/294H03F2203/7231H04K3/224H04W52/0238Y02D70/1222Y02D70/40
    • Techniques for operating a receiver to linearity performance and higher receive signal to noise ratio are described. The receiver includes one or more circuit blocks, e.g., a low noise amplifier (LNA), having discrete gain states. The gain states are selected based on switch points, with each switch point indicating a specific received signal level at which to switch from one gain state to another gain state. The switch points may be dynamically selected based on channel conditions, which may be characterized by the presence or absence or strength or frequency of jammers. A first set of switch points may be selected when jammers are detected, and a second set of switch points may be selected when jammers are not detected. The gain states are selected in accordance with the set of switch points selected for use.
    • 描述了用于操作接收机以获得线性性能和较高接收信噪比的技术。 接收机包括具有离散增益状态的一个或多个电路块,例如低噪声放大器(LNA)。 根据切换点选择增益状态,每个开关点指示从一个增益状态切换到另一增益状态的特定接收信号电平。 可以基于信道条件动态地选择切换点,其可以由干扰的存在或不存在或强度或频率来表征。 当检测到干扰时,可以选择第一组切换点,并且当没有检测到干扰时可以选择第二组切换点。 增益状态根据选择使用的开关点集合进行选择。
    • 5. 发明授权
    • Through the hole rotary position sensor with non-symmetric pole pieces
    • 通过带非对称极片的孔旋转位置传感器
    • US07378842B2
    • 2008-05-27
    • US11776040
    • 2007-07-11
    • Brian George Babin
    • Brian George Babin
    • G01B7/30
    • G01D5/145G01D5/2515
    • A through the hole rotary position sensor which incorporates a single ring magnet with a central aperture. The rotating shaft whose angular position is to be sensed is received in the central aperture. The through the hole rotary position sensor includes a pair of pole pieces which extend around the circular magnet. Magnetic flux responsive elements are disposed adjacent the pole pieces. In order to shield the sensor from undesirable magnetic flux influences through the rotatable shaft, an internal shunt ring is provided around the exterior of the rotatable shaft. The circular magnet, pole pieces, magnetic flux responsive element, optional shunt rings and shunt discs are carried by a non-magnetic housing.
    • A通过孔旋转位置传感器,其包含具有中心孔的单个环形磁体。 要检测其角度位置的旋转轴被接收在中心孔中。 通孔旋转位置传感器包括围绕圆形磁体延伸的一对极片。 磁通响应元件邻近极片设置。 为了将传感器屏蔽通过可旋转轴的不期望的磁通量影响,在可旋转轴的外部周围设置有内部分流环。 圆形磁体,极片,磁通响应元件,可选的分流环和分流盘由非磁性壳体承载。
    • 9. 发明授权
    • Frequency compensation for rotating target sensor
    • 旋转目标传感器的频率补偿
    • US06714003B2
    • 2004-03-30
    • US10057374
    • 2002-01-25
    • Brian George Babin
    • Brian George Babin
    • G01B714
    • G01P21/02G01D3/022G01P3/488
    • A compensation circuit for compensating for switching point errors in rotating target or gear tooth sensors. The compensation circuit may include a processing unit and a persistent storage device, such as an electrically erasable programmable read-only memory (EEPROM), for storing compensation values that are used to provide automatic compensation of the rotating target sensor after the sensor module is installed by the end user. The actual and compensation values may be determined and stored as linear functions in the form of mX+b, where X is the frequency of the rotating target, m is the slope and b is the y-intercept. In order to provide compensation, the actual slope value m is multiplied by a compensation value. The y intercept (i.e. b) is selected, for example, to be the maximum speed in a given application. The compensation values (i.e. slope m and intercept b) may be determined on a part-by-part basis by the sensor manufacturer or by utilizing averages, in which case, the calibration values can be determined for the application and pre-programmed by the Hall effect IC manufacturer. In operation, the sensor output value is applied to the compensation circuit which processes the actual operate point and provides ideal operate points automatically, thus eliminating the need for the end user to attempt compensate for switching point errors of such digital Hall effect devices.
    • 补偿电路,用于补偿旋转目标或齿轮传感器中的切换点误差。 补偿电路可以包括处理单元和诸如电可擦除可编程只读存储器(EEPROM)的持久存储设备,用于存储用于在传感器模块安装之后用于提供旋转目标传感器的自动补偿的补偿值 由最终用户。 实际和补偿值可以确定并存储为mX + b形式的线性函数,其中X是旋转目标的频率,m是斜率,b是y截距。 为了提供补偿,将实际斜率值m乘以补偿值。 例如,y截距(即b)被选择为在给定应用中的最大速度。 补偿值(即斜率m和截距b)可以由传感器制造商逐个部分地确定,或者利用平均值,在这种情况下,可以为应用确定校准值,并由 霍尔效应IC制造商。 在操作中,传感器输出值被应用于处理实际操作点并且自动提供理想操作点的补偿电路,从而不需要最终用户尝试补偿这种数字霍尔效应装置的切换点误差。
    • 10. 发明授权
    • Agricultural crop spraying apparatus
    • 农作物喷洒装置
    • US6164559A
    • 2000-12-26
    • US331220
    • 1999-06-17
    • Brian George Knight
    • Brian George Knight
    • A01M7/00B05B1/20
    • A01M7/006A01M7/0075
    • Agricultural crop spraying apparatus comprising a spray boom made from a space-frame of members comprising laterally and vertically spaced longitudinally extending members joined at intervals by traverse cross-members, with the spray nozzles disposed within the boom framework for protection characterized in that the cross-members of the spray boom frame are positioned above the lowest extremity of the boom framework to allow the spray nozzles to be disposed below the cross-members while still positioning the nozzles within the boom and to allow uninterrupted longitudinal positioning of the spray nozzles. Preferably, the cross-section of the boom is substantially triangular so that the sections of the folded boom arms interfit one with the other. Hinges joining the section of the boom preferably have inclined pivot axes such that the height reached by the boom extremities during folding is less than the arms pivot vertically.
    • PCT No.PCT / GB98 / 00013 Sec。 371日期1999年6月17日第 102(e)日期1999年6月17日PCT提交1998年1月5日PCT公布。 第WO98 / 30087号公报 日期1998年7月16日农业作物喷洒装置包括由空间框架构成的喷雾臂,包括横向和垂直间隔的纵向延伸构件,横向横向构件间隔连接,喷嘴设置在悬臂框架内用于保护特征 其特征在于喷雾臂框架的横向构件位于起重臂框架的最下端之上,以允许喷嘴设置在横梁的下方,同时仍将喷嘴定位在悬臂内,并允许喷嘴臂的不间断的纵向定位 喷嘴。 优选地,悬臂的横截面基本上是三角形的,使得折叠的悬臂臂的部分彼此相互配合。 连接起重臂的部分的铰链优选地具有倾斜的枢转轴线,使得在折叠期间由起重臂末端达到的高度小于臂垂直枢转。