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12 条记录 (耗时 0.022 秒)

    Delay elements arranged for a signal controlled oscillator
    1.
    发明授权
    Delay elements arranged for a signal controlled oscillator 失效
    布置为信号控制振荡器的延迟元件

    公开(公告)号：US6157266A

    公开(公告)日：2000-12-05

    申请号：US22464

    申请日：1998-02-12

    申请人： Li Ching Tsai ,  Johnny Q. Zhang ,  David B. Hollenbeck

    发明人： Li Ching Tsai ,  Johnny Q. Zhang ,  David B. Hollenbeck

    IPC分类号： H03K3/354 ,  H03B5/08 ,  H03K3/0231 ,  H03B5/24

    CPC分类号： H03K3/0231

    摘要： A ring-type signal controlled oscillator comprising a series of active delay elements, each including a respective differential pair of transistors. The inputs and outputs of the differential pair transistors are interconnected in a closed ring to produce oscillations at a frequency determined by the delay of each delay element. The differential pair of transistors further has a pair of current source inputs for controlling an amount of delay of the delay element, and a pair of load inputs for stabilizing the amount of delay. The invention advantageously provides high frequency operation with substantially symmetric rise and fall time, while limiting spread in oscillation frequency and spread in amplitude in relation to fabrication process variability and power supply variability.

    摘要翻译： 一种环形信号控制振荡器，包括一系列有源延迟元件，每个有源延迟元件均包括相应的差分对晶体管。 差分对晶体管的输入和输出在闭环中互连以产生由每个延迟元件的延迟确定的频率的振荡。 晶体管的差分对还具有用于控制延迟元件的延迟量的一对电流源输入端和用于稳定延迟量的一对负载输入。 本发明有利地提供具有基本对称的上升和下降时间的高频操作，同时限制振荡频率的扩展并且相对于制造工艺变化性和电源变化性而在幅度上扩展。

    Termination structure based on the cancellation of the reflected wave
    2.
    发明授权
    Termination structure based on the cancellation of the reflected wave 失效
    基于消除反射波的终止结构

    公开(公告)号：US06246721B1

    公开(公告)日：2001-06-12

    申请号：US08935012

    申请日：1997-09-22

    申请人： Johnny Q. Zhang ,  David B. Hollenbeck

    发明人： Johnny Q. Zhang ,  David B. Hollenbeck

    IPC分类号： H04B300

    CPC分类号： G06F13/4086 ,  G06F1/10 ,  H04L25/0298

    摘要： A termination structure is shown whereby multiple transmission lines designed to have the same intrinsic impedance and same delay are driven from a central node. The central node is driven by a driver and calibration resistor connected in series to produce a drive impedance that is equal to the parallel combination of the intrinsic impedances of the multiple transmission lines. At the other end of the multiple transmission lines is a receiver and a feedback circuit. The feedback circuit provides a modest amount of positive feedback from the output of the receiver to the input of the receiver. This positive feedback prevents the output of the receiver from being affected by small reflections and perturbations that result from mismatches among the multiple transmission lines.

    摘要翻译： 示出了终端结构，其中设计成具有相同的固有阻抗和相同延迟的多条传输线路从中心节点驱动。 中心节点由串联连接的驱动器和校准电阻驱动，以产生等于多条传输线的本征阻抗的并联组合的驱动阻抗。 在多条传输线的另一端是接收机和反馈电路。 反馈电路提供从接收器的输出到接收器的输入的适量的正反馈。 这种正反馈防止接收机的输出受到由多个传输线之间的不匹配引起的小的反射和扰动的影响。

    NOR-BASED GRAYSCALE FOR A DIGITAL DISPLAY
    10.
    发明申请
    NOR-BASED GRAYSCALE FOR A DIGITAL DISPLAY 审中-公开
    用于数字显示的基于NOR的灰度图

    公开(公告)号：US20120069060A1

    公开(公告)日：2012-03-22

    申请号：US13247021

    申请日：2011-09-28

    申请人： Mark A. Handschy ,  James M. Dallas ,  Per Harold Larsen ,  David B. Hollenbeck

    发明人： Mark A. Handschy ,  James M. Dallas ,  Per Harold Larsen ,  David B. Hollenbeck

    IPC分类号： G09G3/36 ,  G09G5/10

    CPC分类号： G09G3/3629 ,  G09G3/2014 ,  G09G3/3618 ,  G09G2300/0809 ,  G09G2300/0857 ,  G09G2310/0235 ,  G09G2320/0285 ,  G09G2320/0673

    摘要： A digital display provides pulse-width-modulated pixel waveforms by applying a wired-NOR function to selected bits of stored image data. Image bits are selected according to a digital sequence and the wired-NOR function results in a trigger signal that may be used to switch the state of a pixel element. The pixel element may be a pixel state latch of a pixel driver circuit. The digital display may accept conventional 24-bit color video signals (one 8-bit gray-scale value for each pixel for each of the red, green, and blue primary colors), and convert this input signal to sequential color with PWM digital gray scale drive to each pixel.

    摘要翻译： 数字显示器通过对所存储的图像数据的选定位应用有线NOR功能来提供脉冲宽度调制的像素波形。 根据数字序列选择图像位，并且有线NOR功能产生可用于切换像素元件的状态的触发信号。 像素元件可以是像素驱动器电路的像素状态锁存器。 数字显示器可以接受常规的24位彩色视频信号（每个红色，绿色和蓝色原色的每个像素的一个8位灰度值），并将该输入信号转换成具有PWM数字灰度的顺序颜色 对每个像素进行刻度驱动。