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    • 2. 发明授权
    • Voltage mode transmitter equalizer
    • 电压模式变送器均衡器
    • US08633733B2
    • 2014-01-21
    • US13260549
    • 2010-03-26
    • Wayne D. DettloffJohn W. PoultonJohn M. Wilson
    • Wayne D. DettloffJohn W. PoultonJohn M. Wilson
    • H03K19/094
    • 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。
    • 6. 发明授权
    • Receiver resistor network for common-mode signaling
    • 用于共模信号的接收电阻网络
    • US08743973B2
    • 2014-06-03
    • US13115838
    • 2011-05-25
    • Lei LuoBrian S. LeibowitzJared L. ZerbeBarry W. DalyWayne D. DettloffJohn C. Eble, IIIJohn Wilson
    • Lei LuoBrian S. LeibowitzJared L. ZerbeBarry W. DalyWayne D. DettloffJohn C. Eble, IIIJohn Wilson
    • H04B3/00H04L25/00
    • H04L5/20
    • A receiver circuit to receive signals from first and second pairs of transmission lines includes first and second interfaces, each with first and second input nodes to receive respective signals. The receiver circuit also includes a resistor network with first, second, third, and fourth resistive elements. The first and second resistive elements are each connected between the input nodes of a respective interface. The third and fourth resistive elements each include a pair of resistors connected in series between the input nodes of a respective interface, and an intermediate node between the resistors. The intermediate nodes are connected to an AC ground. The receiver circuit further includes a differential amplifier with first and second inputs coupled respectively to the first and second interfaces and an output to provide a signal derived from common mode components of the signals received at the input nodes.
    • 接收来自第一和第二对传输线的信号的接收机电路包括第一和第二接口,每个具有第一和第二输入节点以接收相应的信号。 接收器电路还包括具有第一,第二,第三和第四电阻元件的电阻器网络。 第一和第二电阻元件各自连接在相应接口的输入节点之间。 第三和第四电阻元件各自包括串联连接在相应接口的输入节点和电阻器之间的中间节点的一对电阻器。 中间节点连接到交流接地。 接收器电路还包括差分放大器,其具有分别耦合到第一和第二接口的第一和第二输入以及输出,以提供从在输入节点处接收的信号的共模分量得到的信号。
    • 8. 发明授权
    • High resolution output driver
    • 高分辨率输出驱动
    • US08531206B2
    • 2013-09-10
    • US13391383
    • 2010-09-14
    • Amir AmirkhanyChaofeng HuangKambiz KavianiWayne D. DettloffKun-Yung Chang
    • Amir AmirkhanyChaofeng HuangKambiz KavianiWayne D. DettloffKun-Yung Chang
    • H03K17/16
    • 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.
    • 具有相对较少数量的子驱动器分支或切片的高分辨率输出驱动器,每个子驱动器分支或切片具有显着大于量化步长的标称阻抗,并且通过显着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“不均匀”子驱动器切片实现n选择k均衡器的相应元件,每个这样的差分子驱动器切片由均匀元件阻抗校准DAC实现。 在另一实施方式中,均匀分片均衡器的每个分量由差分片阻抗校准DAC实现,并且在又一实现中,差分片均衡器的每个分量由差分片阻抗校准DAC实现。 在一组额外的实施方案中,均衡和阻抗校准功能在各个并行的驱动器分支组中实现,而不是分层实现中嵌套的“DAC内的DAC”布置。 通过这种双边安排,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副驱动器片的总数。
    • 9. 发明申请
    • VOLTAGE MODE TRANSMITTER EQUALIZER
    • 电压模式发射机均衡器
    • US20120025800A1
    • 2012-02-02
    • US13260549
    • 2010-03-26
    • Wayne D. DettloffJohn W. PoultonJohn M. Wilson
    • Wayne D. DettloffJohn W. PoultonJohn M. Wilson
    • G05F5/00G05F3/02
    • 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。
    • 10. 发明申请
    • Receiver Resistor Network for Common-Mode Signaling
    • 用于共模信号的接收器电阻网络
    • US20110293041A1
    • 2011-12-01
    • US13115838
    • 2011-05-25
    • Lei LuoBrian S. LeibowitzJared L. ZerbeBarry W. DalyWayne D. DettloffJohn C. Eble, IIIJohn Wilson
    • Lei LuoBrian S. LeibowitzJared L. ZerbeBarry W. DalyWayne D. DettloffJohn C. Eble, IIIJohn Wilson
    • H04L27/00
    • H04L5/20
    • A receiver circuit to receive signals from first and second pairs of transmission lines includes first and second interfaces, each with first and second input nodes to receive respective signals. The receiver circuit also includes a resistor network with first, second, third, and fourth resistive elements. The first and second resistive elements are each connected between the input nodes of a respective interface. The third and fourth resistive elements each include a pair of resistors connected in series between the input nodes of a respective interface, and an intermediate node between the resistors. The intermediate nodes are connected to an AC ground. The receiver circuit further includes a differential amplifier with first and second inputs coupled respectively to the first and second interfaces and an output to provide a signal derived from common mode components of the signals received at the input nodes.
    • 接收来自第一和第二对传输线的信号的接收机电路包括第一和第二接口,每个具有第一和第二输入节点以接收相应的信号。 接收器电路还包括具有第一,第二,第三和第四电阻元件的电阻器网络。 第一和第二电阻元件各自连接在相应接口的输入节点之间。 第三和第四电阻元件各自包括串联连接在相应接口的输入节点和电阻器之间的中间节点的一对电阻器。 中间节点连接到交流接地。 接收器电路还包括差分放大器,其具有分别耦合到第一和第二接口的第一和第二输入端和输出端,以提供从在输入节点接收的信号的共模分量得到的信号。