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35 条记录 (耗时 0.016 秒)

    LOW VOLTAGE DIFFERENTIAL SIGNAL DRIVER WITH REDUCED POWER CONSUMPTION
    1.
    发明申请
    LOW VOLTAGE DIFFERENTIAL SIGNAL DRIVER WITH REDUCED POWER CONSUMPTION 有权
    具有降低功耗的低电压差分信号驱动器

    公开(公告)号：US20110234318A1

    公开(公告)日：2011-09-29

    申请号：US13159672

    申请日：2011-06-14

    申请人： Khaldoon Abugharbieh ,  Jitendra Mohan ,  Ivan Dyzevik

    发明人： Khaldoon Abugharbieh ,  Jitendra Mohan ,  Ivan Dyzevik

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45475 ,  H03F3/45094

    摘要： A low voltage differential signal (LVDS) driver circuit with reduced power consumption. A pre-driver stage, implemented as a differential current mode amplifier, is driven by the differential input signal and provides a corresponding differential drive signal, which drives the output stage, implemented as a differential voltage mode amplifier, which, in turn, provides the differential output signal for the load. Total current consumption equals the load current, which is provided by the output stage, plus a much smaller current used by the pre-driver stage.

    摘要翻译： 低电压差分信号（LVDS）驱动电路，功耗降低。 实现为差分电流模式放大器的预驱动器级由差分输入信号驱动，并提供驱动输出级的相应的差分驱动信号，该差分驱动信号被实现为差分电压模式放大器，其反过来提供 负载的差分输出信号。 总电流消耗等于由输出级提供的负载电流，加上预驱动级使用的电流要小得多。

    Method of using low bandwidth sensor for measuring high frequency AC modulation amplitude
    2.
    发明授权
    Method of using low bandwidth sensor for measuring high frequency AC modulation amplitude 有权
    使用低带宽传感器测量高频交流调制幅度的方法

    公开(公告)号：US07502568B1

    公开(公告)日：2009-03-10

    申请号：US10728065

    申请日：2003-12-04

    申请人： Jitendra Mohan

    发明人： Jitendra Mohan

    IPC分类号： H04B10/00

    CPC分类号： H04B10/0799 ,  H04B10/564

    摘要： A slow monitor diode having a bandwidth only partially overlapping a lower end of a data transmission spectrum for a data transmission laser is employed to detect and control average output power of the data transmission laser and, from peak-to-peak measurements, optical modulation amplitude. The output current from the monitor diode reaches a peak value for long runs of consecutive logical 1's or 0's. Using peak detectors with a long decay rate, the peak-to-peak signal amplitude, directly representative of optical modulation amplitude, may be determined.

    摘要翻译： 采用具有与数据传输激光器的数据传输频谱的下端仅部分重叠的带宽的缓慢监视二极管来检测和控制数据传输激光器的平均输出功率，并且从峰到峰测量得到光调制幅度 。 来自监视二极管的输出电流达到连续逻辑1或0的长时间运行的峰值。 使用长衰减速率的峰值检测器，可以确定直接代表光调制幅度的峰 - 峰信号幅度。

    Apparatus and method for employing gain dependent biasing to reduce offset and noise in a current conveyor type amplifier
    4.
    发明授权
    Apparatus and method for employing gain dependent biasing to reduce offset and noise in a current conveyor type amplifier 有权
    用于采用增益相关偏置以减小当前输送机型放大器中的偏移和噪声的装置和方法

    公开(公告)号：US06724251B1

    公开(公告)日：2004-04-20

    申请号：US10244150

    申请日：2002-09-12

    申请人： Ramsin M. Ziazadeh ,  Jitendra Mohan ,  Abu-Hena Mostafa Kamal

    发明人： Ramsin M. Ziazadeh ,  Jitendra Mohan ,  Abu-Hena Mostafa Kamal

    IPC分类号： H03F136

    CPC分类号： H03F1/0266 ,  H03F1/34

    摘要： A circuit with low noise and reduced offset that feeds an input of an opamp with a programmable feedback resistor that provides variable gain settings. Input biasing currents are varied using control bits that are also used to adjust the gain. When the input signal is small (gain at higher setting), a minimum bias current is provided to source the input voltage swing. This scheme reduces the noise and offset generated by the lower transconductance of a biasing transistor while maintaining a constant SNR and fixed offset even in the presence of relatively small input swings. Also, when the input signal is large (gain at lower setting), a maximum bias current can be provided to accommodate the relatively large input swing level. Although the overall noise and offset current are increased for large input swings, the overall SNR and offset is maintained for relatively lower input swings.

    摘要翻译： 具有低噪声和偏移偏移的电路，可将运算放大器的输入与可编程反馈电阻器进行输入，从而提供可变增益设置。 使用也用于调整增益的控制位来改变输入偏置电流。 当输入信号较小（较高设定时的增益）时，提供最小偏置电流来输入电压摆幅。 该方案减少了由偏置晶体管的较低跨导产生的噪声和偏移，同时即使在存在相对较小的输入摆幅的情况下也能保持恒定的SNR和固定偏移。 此外，当输入信号较大（在较低设置下的增益）时，可以提供最大偏置电流以适应较大的输入摆幅电平。 尽管对于大的输入摆幅，整体噪声和偏移电流增加，但是对于相对较低的输入摆幅，整体SNR和偏移量保持不变。

    RC calibration circuit with reduced power consumption and increased accuracy
    5.
    发明授权
    RC calibration circuit with reduced power consumption and increased accuracy 有权
    RC校准电路，功耗降低，准确度提高

    公开(公告)号：US06262603B1

    公开(公告)日：2001-07-17

    申请号：US09515183

    申请日：2000-02-29

    申请人： Jitendra Mohan ,  Devnath Varadarajan ,  Vijaya Ceekala

    发明人： Jitendra Mohan ,  Devnath Varadarajan ,  Vijaya Ceekala

    IPC分类号： H03K522

    CPC分类号： H03H7/0153 ,  H03B5/20 ,  H03H2210/043

    摘要： An RC calibration circuit, which utilizes a resistor and a variable capacitor connected in parallel, reduces power consumption and increases the accuracy of the calibration by comparing the voltage on the resistor to the voltage on the capacitor after a predetermined time has expired since the capacitor began charging up. The result of the comparison, which indicates whether the voltage on the resistor is greater than the voltage on the capacitor, is then used to adjust the capacitance of the capacitor to servo the RC time constant to a predetermined value.

    摘要翻译： 使用电阻器和可变电容并联连接的RC校准电路通过将电阻器上的电压与电容器上的电压进行比较，降低功耗并提高校准精度，这是由于电容器开始 充电 比较结果表明，电阻器上的电压是否大于电容器上的电压，然后用于调整电容器的电容以使RC时间常数维持在预定值。

    Apparatus and method for high-speed serial communications
    6.
    发明授权
    Apparatus and method for high-speed serial communications 有权
    高速串行通信的装置和方法

    公开(公告)号：US07474133B1

    公开(公告)日：2009-01-06

    申请号：US11633727

    申请日：2006-12-05

    申请人： Arlo Aude ,  Jitendra Mohan ,  Ivan Duzevik

    发明人： Arlo Aude ,  Jitendra Mohan ,  Ivan Duzevik

    IPC分类号： H03K3/00

    CPC分类号： H03K19/018528

    摘要： An apparatus, device, and method for high-speed serial communications are provided. An input circuit is operable to receive an input signal, where the input circuit includes transistors forming (i) a first differential pair associated with a first current source and (ii) a second differential pair associated with a second current source. An output circuit is coupled to the input circuit and is operable to generate an output signal based on the input signal. A sensing circuit is operable to estimate a voltage associated with one of the current sources. A comparator is operable to compare the estimated voltage and a reference voltage and to selectively enable one of the differential pairs and disable another of the differential pairs based on the comparison. The differential pairs could be enabled and disabled using a first switch associated with the first differential pair and a second switch associated with the second differential pair.

    摘要翻译： 提供了一种用于高速串行通信的装置，装置和方法。 输入电路可操作以接收输入信号，其中输入电路包括形成（i）与第一电流源相关联的第一差分对的晶体管和（ii）与第二电流源相关联的第二差分对。 输出电路耦合到输入电路并且可操作以基于输入信号产生输出信号。 感测电路可操作以估计与一个电流源相关联的电压。 比较器可操作以比较估计的电压和参考电压，并且基于比较选择性地启用差分对中的一个并且禁用另一个差分对。 可以使用与第一差分对相关联的第一开关和与第二差分对相关联的第二开关来使能和禁用差分对。

    Configuration for dockable portable computers using a single ethernet physical layer chip and transformer
    8.
    发明授权
    Configuration for dockable portable computers using a single ethernet physical layer chip and transformer 有权
    使用单个以太网物理层芯片和变压器的可停靠便携式计算机的配置

    公开(公告)号：US07107380B1

    公开(公告)日：2006-09-12

    申请号：US10728191

    申请日：2003-12-04

    申请人： Jitendra Mohan

    发明人： Jitendra Mohan

    IPC分类号： G06F13/00

    CPC分类号： G06F1/1632

    摘要： A single 10/100/1000BT Ethernet network physical layer chip and a single transformer, both within a mobile computer, are employed to provide a network connection to the mobile computer either through a network connection interface within a docking station receiving the mobile computer, when the mobile computer is docked, or through a network connection interface within the mobile computer, when the mobile computer is not docked. Connection traces to the unused network connection interface have the characteristics of a small, unterminated stub, with any reflections handled by intrinsic echo cancellation during 1000BT operation and negligible during 10/100BT operation.

    摘要翻译： 采用在移动计算机内的单个10/100 / 1000BT以太网物理层芯片和单个变压器来通过接收移动计算机的坞站内的网络连接接口向移动计算机提供网络连接， 当移动计算机没有对接时，移动计算机被对接，或通过移动计算机内的网络连接接口。 到未使用的网络连接接口的连接轨迹具有小的未端接短截线的特征，在1000BT操作期间通过本征回声消除处理任何反射，并在10 / 100BT操作期间可忽略。