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    System and method of operation of DLL and PLL to provide tight locking with large range, and dynamic tracking of PVT variations using interleaved delay lines
    72.
    发明授权
    System and method of operation of DLL and PLL to provide tight locking with large range, and dynamic tracking of PVT variations using interleaved delay lines 失效
    DLL（双锁定环）和PLL（锁相环）的操作系统和方法，提供大范围的紧密锁定，并使用交错延迟线动态跟踪PVT变化

    公开(公告)号：US06845458B2

    公开(公告)日：2005-01-18

    申请号：US10731679

    申请日：2003-12-09

    申请人： Feng Lin

    发明人： Feng Lin

    IPC分类号： G11C11/407 ,  G06F1/10 ,  G06F1/12 ,  G11C8/02 ,  G11C11/409 ,  H03K5/14 ,  H03L7/00 ,  H03L7/06 ,  H03L7/081 ,  H03L7/087 ,  H03L7/099

    CPC分类号： G06F1/10 ,  G11C7/1072 ,  G11C7/222 ,  H03L7/0814 ,  H03L7/0818 ,  H03L7/087 ,  H03L7/0998 ,  Y10T307/951

    摘要： An interleaved delay line for use in phase locked and delay locked loops is comprised of a first portion providing a variable amount of delay substantially independently of process, temperature and voltage (PVT) variations while a second portion, in series with the first portion, provides a variable amount of delay that substantially tracks changes in process, temperature, and voltage variations. By combining, or interleaving, the two types of delay, single and dual locked loops constructed using the present invention achieve a desired jitter performance under PVT variations, dynamically track the delay variations of one coarse tap without a large number of delay taps, and provide for quick and tight locking. Methods of operating delay lines and locked loops are also disclosed.

    摘要翻译： 用于锁相和延迟锁定环的交错延迟线包括第一部分，其基本上独立于过程，温度和电压（PVT）变化提供可变量的延迟，而与第一部分串联的第二部分提供 可变量的延迟，其基本上跟踪过程，温度和电压变化的变化。 通过组合或交织两种类型的延迟，使用本发明构造的单锁定环和双锁定环在PVT变化下实现期望的抖动性能，动态地跟踪一个粗抽头的延迟变化而没有大量延迟抽头，并提供 用于快速和紧密的锁定。 还公开了延迟线和锁定环路的操作方法。

    System and method for skew compensating a clock signal and for capturing a digital signal using the skew compensated clock signal
    73.
    发明授权
    System and method for skew compensating a clock signal and for capturing a digital signal using the skew compensated clock signal 有权
    用于偏斜补偿时钟信号并使用偏斜补偿时钟信号捕获数字信号的系统和方法

    公开(公告)号：US06812753B2

    公开(公告)日：2004-11-02

    申请号：US10313141

    申请日：2002-12-06

    申请人： Feng Lin

    发明人： Feng Lin

    IPC分类号： H03L706

    CPC分类号： G11C7/1066 ,  G06F1/10 ,  G11C7/22 ,  G11C7/222 ,  H03K5/135 ,  H03K5/15013 ,  H03L7/0812 ,  H03L7/095

    摘要： A synchronized mirror delay circuit is used to generate an internal clock signal from an external clock signal applied to the synchronized mirror delay. The internal clock signal is then coupled through a clock tree, and a feedback signal is generated that is indicative of the propagation delay of the internal clock signal through the clock tree. The feedback signal is applied to the synchronized mirror delay to allow the synchronized mirror delay to delay the internal clock signal by a delay interval that compensates for the propagation delay in the clock tree. A lock detector may be used to initially generate the internal clock signal directly from the external clock signal. A fine delay circuit that delays the internal clock signal in relatively fine increments may be used to couple the internal clock signal to the clock tree.

    摘要翻译： 同步镜延迟电路用于从施加到同步反射镜延迟的外部时钟信号产生内部时钟信号。 然后通过时钟树将内部时钟信号耦合，产生指示通过时钟树的内部时钟信号的传播延迟的反馈信号。 反馈信号被应用于同步的镜像延迟，以允许同步的镜像延迟以延迟时钟信号延迟时钟树中的传播延迟的延迟间隔。 锁定检测器可以用于从外部时钟信号直接产生内部时钟信号。 可以使用以相对精细的增量延迟内部时钟信号的精细延迟电路将内部时钟信号耦合到时钟树。

    Soft start for a synchronous rectifier in a power converter
    74.
    发明授权
    Soft start for a synchronous rectifier in a power converter 有权
    电源转换器中同步整流器的软启动

    公开(公告)号：US06760235B2

    公开(公告)日：2004-07-06

    申请号：US10241336

    申请日：2002-09-11

    申请人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

    发明人： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

    IPC分类号： H02M3335

    CPC分类号： H02M1/36 ,  H02M3/33592 ,  Y02B70/1475

    摘要： Circuit and method for controlling circuitry in a power converter device during a soft-start process is provided. Synchronous rectifier control circuitry is adapted to gradually apply a gate drive signal derived from the main switch of the power converter device to a freewheeling synchronous rectifier of the switching circuitry during the soft-start process. The control circuitry gradually releases the amplitude or the pulse-width of the gate drive signal to the freewheeling synchronous rectifier to avoid a large duty ratio in the synchronous rectifier during start-up so that a negative current does not build up in the output inductor.

    摘要翻译： 提供了在软启动过程中控制功率转换器装置中的电路的电路和方法。 同步整流器控制电路适于在软启动过程中逐渐将从功率转换器装置的主开关导出的栅极驱动信号施加到开关电路的续流同步整流器。 控制电路逐渐将栅极驱动信号的幅度或脉冲宽度释放到续流同步整流器，以避免启动期间同步整流器中的大占空比，从而在输出电感器中不产生负电流。

    Auxiliary bias circuit for a power supply and a method of operation thereof
    76.
    发明授权
    Auxiliary bias circuit for a power supply and a method of operation thereof 有权
    用于电源的辅助偏置电路及其操作方法

    公开(公告)号：US06181577B2

    公开(公告)日：2001-01-30

    申请号：US09360563

    申请日：1999-07-26

    申请人： Shiaw-Jong Steve Chen ,  Feng Lin

    发明人： Shiaw-Jong Steve Chen ,  Feng Lin

    IPC分类号： H02M3335

    CPC分类号： H02M3/335 ,  H02M2001/0006 ,  H02M2001/009

    摘要： For use in a power supply having a bias circuit with a bias transformer, an auxiliary bias circuit and a method of providing power via the auxiliary bias circuit to an auxiliary load. In one embodiment, the auxiliary bias circuit includes a blocking device coupled to the bias transformer. The auxiliary bias circuit also includes a storage device, coupled to the blocking device and across the bias transformer, that provides a voltage to drive the auxiliary load without requiring a separate power supply.

    摘要翻译： 用于具有偏置电路的偏置电路的电源，辅助偏置电路以及通过辅助偏置电路向辅助负载提供电力的方法。 在一个实施例中，辅助偏置电路包括耦合到偏置变压器的阻断装置。 辅助偏置电路还包括耦合到阻断装置并跨越偏置变压器的存储装置，其提供电压以驱动辅助负载而不需要单独的电源。

    System architecture for multiple input/output devices
    77.
    发明授权
    System architecture for multiple input/output devices 失效
    用于多个输入/输出设备的系统架构

    公开(公告)号：US6005674A

    公开(公告)日：1999-12-21

    申请号：US607628

    申请日：1996-02-27

    申请人： Feng Lin

    发明人： Feng Lin

    IPC分类号： H04N1/00 ,  H04M11/00

    CPC分类号： H04N1/32797 ,  H04N1/00206 ,  H04N2201/0015

    摘要： A system or a board that interacts with a processor and multi I/O devices such as high-speed facsimile modems. The processor inputs/outputs data to I/O devices. Each I/O device includes an indicator, such as an Interrupt Request output, to signify a request that the I/O device will output or input data. If the indicator signifies a request, the processor will input data from or output data to the I/O device within a predetermined period Ti, in order to prevent the data from being lost. To this end, the new system or board includes a timer that periodically interrupts the processor and causes it to execute an interrupt service at a period T, where T

    摘要翻译： 与处理器和多个I / O设备（如高速传真调制解调器）进行交互的系统或板卡。 处理器将数据输入/输出到I / O设备。 每个I / O设备包括指示符，例如中断请求输出，以表示I / O设备将输出或输入数据的请求。 如果指示符表示请求，则处理器将在预定时间段Ti内将数据输入或输出到I / O设备，以防止数据丢失。 为此，新系统或电路板包括一个定时器，周期性地中断处理器并使其在T = Ti处执行中断服务，因此处理器检测I / O设备的指示符，并读取 将数据从数据写入或写入任何发出请求的I / O设备。

    Keyboard with projection device
    78.
    发明授权
    Keyboard with projection device 有权

    公开(公告)号：US11698574B2

    公开(公告)日：2023-07-11

    申请号：US17090914

    申请日：2020-11-06

    申请人： Hao Jiang ,  Feng Lin

    发明人： Hao Jiang ,  Feng Lin

    IPC分类号： G03B21/134 ,  H01H13/83 ,  G06F3/02 ,  H01H13/86 ,  G03B21/16 ,  H01H13/702

    CPC分类号： G03B21/134 ,  G03B21/16 ,  G06F3/021 ,  H01H13/86 ,  H01H13/702 ,  H01H13/83 ,  H01H2223/04 ,  H01H2239/058

    摘要： A keyboard includes a frame board, a base board secured to the frame board, a membrane circuit board in a space defined by the frame and base boards, a support board on the membrane circuit board, a switch board on the support board, keys on the switch board, a lithium battery on the base board, a control circuit board on the lithium battery, a projection device in the space defined by the frame and base boards, an outer screen on the right side of the frame board, an inner screen on the control circuit board, lights on the frame board, vent-holes on the frame board, first function keys and a second function key on the frame board, a recess on the right side of the base board with the lithium battery therein, a projection device below the vent-holes, and a projection hole aligned with the projection device.

    Modular keyboard
    79.
    发明授权
    Modular keyboard 有权

    公开(公告)号：US11550403B2

    公开(公告)日：2023-01-10

    申请号：US17646873

    申请日：2022-01-04

    申请人： Feng Lin ,  Hao Jiang

    发明人： Feng Lin ,  Hao Jiang

    IPC分类号： G06F3/02

    摘要： A modular keyboard includes a typewriter keys section; a function keys section; a keyboard shortcuts section; a numeric keypad; a cursor control and system command keys section; and a keyboard cable. The typewriter keys section includes first contacts on the back electrically connected to the function keys section, second contacts on the left side electrically connected to the keyboard shortcuts section, third contacts on the front end electrically connected to a hand rest board, fourth contacts on the right side electrically connected to the numeric keypad, and fifth contacts on the rear end electrically connected to the keyboard cable. The numeric keypad includes contacts on the right side electrically connected to the cursor control and system command keys section. The components can be detached prior to carrying same.

    Keyboard with projection device
    80.
    发明申请
    Keyboard with projection device 有权

    公开(公告)号：US20210055639A1

    公开(公告)日：2021-02-25

    申请号：US17090914

    申请日：2020-11-06

    申请人： Hao Jiang ,  Feng Lin

    发明人： Hao Jiang ,  Feng Lin

    IPC分类号： G03B21/134 ,  H01H13/86 ,  G03B21/16

    摘要： A keyboard includes a frame board, a base board secured to the frame board, a membrane circuit board in a space defined by the frame and base boards, a support board on the membrane circuit board, a switch board on the support board, keys on the switch board, a lithium battery on the base board, a control circuit board on the lithium battery, a projection device in the space defined by the frame and base boards, an outer screen on the right side of the frame board, an inner screen on the control circuit board, lights on the frame board, vent-holes on the frame board, first function keys and a second function key on the frame board, a recess on the right side of the base board with the lithium battery therein, a projection device below the vent-holes, and a projection hole aligned with the projection device.