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    • 1. 发明申请
    • HIGH RESOLUTION OUTPUT DRIVER
    • 高分辨率输出驱动器
    • WO2011032178A2
    • 2011-03-17
    • PCT/US2010048826
    • 2010-09-14
    • RAMBUS INCAMIRKHANY AMIRHUANG CHAOFENGKAVIANI KAMBIZDETTLOFF WAYNE DCHANG KUN-YUNG
    • AMIRKHANY AMIRHUANG CHAOFENGKAVIANI KAMBIZDETTLOFF WAYNE DCHANG KUN-YUNG
    • H03K17/687H03F3/26
    • H03K19/0005H03K19/017581H03M1/1061H03M1/745H04L25/0278H04L25/0288H04L25/03343
    • High resolution output drivers having a relatively small number of sub-driver branches or slices each having nominal impedances substantially larger than a quantization step and that incrementally differ from one another by an impedance step substantially smaller than a quantization step. In one implementation, such "differential" or "non¬ uniform" sub-driver slices implement respective elements of an n choose k equalizer, with each such differential sub-driver slice being implemented by a uniform-element impedance calibration DAC. In another implementation, each component of a uniform-slice equalizer is implemented by a differential-slice impedance calibration DAC, and in yet another implementation, each component of a differential-slice equalizer is implemented by a differential-slice impedance calibration DAC. In an additional set of implementations, equalization and impedance calibration functions are implemented bilaterally in respective parallel sets of driver branches, rather than in the nested "DAC within a DAC" arrangement of the hierarchical implementations. Through such bilateral arrangement, multiplication of the equalizer and calibrator quantizations is avoided, thereby lowering the total number of sub-driver slices required to meet the specified ranges and resolutions.
    • 高分辨率输出驱动器具有相对较少数量的子驱动器分支或切片,每个分切器或切片具有基本上大于量化步长的标称阻抗,并且通过基本上小于量化步长的阻抗步长递增地彼此不同。 在一个实现中,这种“差分”或“非均匀”子驱动器片实现n选择k均衡器的相应元件,每个这种差分子驱动器片由均匀元件阻抗校准DAC实现。 在另一个实现中,均匀片均衡器的每个组件由差分片阻抗校准DAC实现,并且在又一个实现中,差分片均衡器的每个组件由差分片阻抗校准DAC实现。 在另外一组实施方式中,均衡和阻抗校准功能是在各自并行的驱动器分支组中双侧实现的,而不是在分层实现中嵌套的“DAC内的DAC”布置中。 通过这种双边配置,避免了均衡器和校准器量化的乘法,从而降低了满足指定范围和分辨率所需的子驱动器片的总数。
    • 2. 发明申请
    • VOLTAGE MODE TRANSMITTER EQUALIZER
    • 电压模式发射机均衡器
    • WO2010111619A3
    • 2011-01-27
    • PCT/US2010028871
    • 2010-03-26
    • RAMBUS INCDETTLOFF WAYNE DPOULTON JOHN WWILSON JOHN M
    • DETTLOFF WAYNE DPOULTON JOHN WWILSON JOHN M
    • H04L25/03H03H17/00H03H21/00H03K19/0175H04L25/02
    • H04L25/03343H04L25/0272H04L25/0278H04L25/03885
    • A voltage mode transmitter equalizer has high efficiencies, yet consumes substantially constant supply current from the power supply and provides constant back-match impedance. The voltage mode transmitter equalizer is configured such that the output voltage of the signal to be output on a pair of transmission lines can be controlled according to the input data, but its return impedance is substantially matched to the differential impedance of the transmission lines and it draws substantially constant supply current from the power supply regardless of the output voltage of the signal. Further, an equalizer for a voltage-mode transmitter provides fine-granularity equalization settings by employing a variable pull-up conductance and a variable pull-down conductance. Conductance is varied by selectively enabling a plurality of conductance channels, at least some of which have resistance values that are distinct from one another.
    • 电压模式发射机均衡器具有高效率,但是从电源消耗基本恒定的电源电流并提供恒定的反匹配阻抗。 电压模式发射机均衡器被配置为使得可以根据输入数据来控制要在一对传输线上输出的信号的输出电压,但是其返回阻抗基本上与传输线的差分阻抗匹配,并且它 无论信号的输出电压如何,都能从电源中抽取大致恒定的电源电流。 此外,用于电压模式发射机的均衡器通过采用可变上拉电导和可变下拉电导来提供细粒度均衡设置。 通过选择性地启用多个电导通道来改变电导,其中至少一些导电通道具有彼此不同的电阻值。
    • 3. 发明申请
    • SYSTEMS AND METHODS FOR WIRELESSLY PROJECTING POWER USING IN-PHASE CURRENT LOOPS AND FOR IDENTIFYING RADIO FREQUENCY IDENTIFICATION TAGS THAT ARE SIMULTANEOUSLY INTERROGATED
    • 使用相电流无线电投射电源的系统和方法,以及用于识别同时中断的无线电频率识别标签
    • WO9960512A9
    • 2000-04-20
    • PCT/US9910877
    • 1999-05-17
    • DB TAG INCDETTLOFF WAYNE DBATCHELOR WILLIAM EHEATON ROBERT ASTEER MICHAEL B
    • DETTLOFF WAYNE DBATCHELOR WILLIAM EHEATON ROBERT ASTEER MICHAEL B
    • G06K7/00G06K7/08G06K7/10H01Q7/00H01Q7/04
    • G06K7/10346G06K7/0008G06K7/10039G06K7/10316G06K7/10336H01Q7/00
    • An array (100) of in-phase current loops are disposed adjacent to one another to define a surface and to define a virtual current loop (120) at a periphery of the surface that produces a same direction virtual current while current in adjacent portions (118a, 118b) of adjacent current loops (112a, 112d) flows in opposite directions, to thereby wirelessly project power from the surface. It has been found according to the invention that the array of in-phase current loops that are disposed adjacent to one another to define a surface and to define a virtual current loop (120) at a periphery of the surface that produces a same direction virtual current while current in adjacent portions (118a, 118d) of adjacent current loops flows in opposite directions, can provide acceptable power to RFID tags, while reducing the risk of violating regulatory constraints. A plurality of arrays of in-phase current loops also may be provided. The multiple arrays of in-phase current loops are disposed adjacent to one another to define a surface. Each array of in-phase current loops may be configured as was described above. N-ary tree traversals, push and pop commands and/or wrap commands also may be used to efficiently identify tags.
    • 同相电流回路的阵列(100)彼此相邻地布置以限定表面并且在表面的周边处限定出虚拟电流回路(120),该虚拟电流回路在相邻部分中产生相同的方向虚拟电流,同时电流 相邻的电流环路(112a,112d)的电流118a,118b)沿相反的方向流动,从而从表面无线投射电力。 根据本发明已经发现,相邻电流回路的阵列彼此相邻设置以限定表面并且在表面的外围限定虚拟电流回路(120),其产生相同的方向虚拟 当相邻电流回路的相邻部分(118a,118d)中的电流沿相反方向流动时,电流可以为RFID标签提供可接受的功率,同时降低违反监管约束的风险。 还可以提供多个同相电流回路阵列。 多个同相电流环阵列彼此相邻设置以限定一个表面。 每个阵列的同相电流回路可以如上所述地配置。 N-ary树遍历,push和pop命令和/或wrap命令也可以用于有效地识别标签。
    • 4. 发明申请
    • SYSTEMS AND METHODS FOR WIRELESSLY PROJECTING POWER USING IN-PHASE CURRENT LOOPS AND FOR IDENTIFYING RADIO FREQUENCY IDENTIFICATION TAGS THAT ARE SIMULTANEOUSLY INTERROGATED
    • 使用相电流无线电投射电源的系统和方法,以及用于识别同时中断的无线电频率识别标签
    • WO9960512A2
    • 1999-11-25
    • PCT/US9910877
    • 1999-05-17
    • DB TAG INCDETTLOFF WAYNE DBATCHELOR WILLIAM EHEATON ROBERT ASTEER MICHAEL B
    • DETTLOFF WAYNE DBATCHELOR WILLIAM EHEATON ROBERT ASTEER MICHAEL B
    • G06K7/00G06K7/08G06K7/10H01Q7/00
    • G06K7/10346G06K7/0008G06K7/10039G06K7/10316G06K7/10336H01Q7/00
    • An array (100) of in-phase current loops are disposed adjacent to one another to define a surface and to define a virtual current loop (120) at a periphery of the surface that produces a same direction virtual current while current in adjacent portions (118a, 118b) of adjacent current loops (112a, 112d) flows in opposite directions, to thereby wirelessly project power from the surface. It has been found according to the invention that the array of in-phase current loops that are disposed adjacent to one another to define a surface and to define a virtual current loop (120) at a periphery of the surface that produces a same direction virtual current while current in adjacent portions (118a, 118d) of adjacent current loops flows in opposite directions, can provide acceptable power to RFID tags, while reducing the risk of violating regulatory constraints. A plurality of arrays of in-phase current loops also may be provided. The multiple arrays of in-phase current loops are disposed adjacent to one another to define a surface. Each array of in-phase current loops may be configured as was described above. N-ary tree traversals, push and pop commands and/or wrap commands also may be used to efficiently identify tags.
    • 同相电流回路的阵列(100)彼此相邻地设置以限定表面并且在表面的周边处限定虚拟电流回路(120),该虚拟电流回路在相邻部分中产生相同的方向虚拟电流,同时电流 相邻的电流回路(112a,112d)的电流118a,118b)沿相反的方向流动,从而从表面无线投射电力。 已经发现根据本发明,同相电流回路的阵列彼此相邻设置以限定表面并且在表面的外围限定虚拟电流回路(120),其产生相同的方向虚拟 当相邻电流回路的相邻部分(118a,118d)中的电流沿相反方向流动时,电流可以为RFID标签提供可接受的功率,同时降低违反监管约束的风险。 还可以提供多个同相电流回路阵列。 多个同相电流环阵列彼此相邻设置以限定一个表面。 每个阵列的同相电流回路可以如上所述地配置。 N-ary树遍历,push和pop命令和/或wrap命令也可以用于有效地识别标签。