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8 条记录 (耗时 0.021 秒)

    System and method for RC calibration using phase and frequency
    1.
    发明授权
    System and method for RC calibration using phase and frequency 有权
    使用相位和频率进行RC校准的系统和方法

    公开(公告)号：US08314652B2

    公开(公告)日：2012-11-20

    申请号：US12777293

    申请日：2010-05-11

    申请人： Feng Wei Kuo ,  Tsung-Hsien Tsai ,  Jia-Liang Chen

    发明人： Feng Wei Kuo ,  Tsung-Hsien Tsai ,  Jia-Liang Chen

    IPC分类号： H03B1/00

    CPC分类号： H03H11/12

    摘要： An RC filter is calibrated to a desired cutoff frequency by initializing the filter with a cutoff frequency. An input signal is filtered by the RC filter to provide a filter output signal having phase and frequency values. The cutoff frequency of the RC filter is adjusted based on the phase and frequency values of the filter output signal if the phase and frequency values do not satisfy a predetermined condition. The filtering and adjusting are repeated until the phase and frequency values of the filter output signal satisfy the predetermined condition. A calibration apparatus has a frequency generator, a resistor-capacitor (RC) filter, a phase comparator, a frequency detector, and a state machine. The phase comparator, frequency detector, and state machine are configured to calibrate the RC filter to a cutoff frequency specified by the reference signal based on a filter output signal of the RC filter.

    摘要翻译： 通过用截止频率初始化滤波器，将RC滤波器校准为所需的截止频率。 输入信号由RC滤波器滤波，以提供具有相位和频率值的滤波器输出信号。 如果相位和频率值不满足预定条件，则根据滤波器输出信号的相位和频率值来调整RC滤波器的截止频率。 重复滤波和调整直到滤波器输出信号的相位和频率值满足预定条件。 校准装置具有频率发生器，电阻 - 电容（RC）滤波器，相位比较器，频率检测器和状态机。 相位比较器，频率检测器和状态机被配置为基于RC滤波器的滤波器输出信号将RC滤波器校准到由参考信号指定的截止频率。

    FILTER AUTO-CALIBRATION USING MULTI-CLOCK GENERATOR
    3.
    发明申请
    FILTER AUTO-CALIBRATION USING MULTI-CLOCK GENERATOR 有权
    使用多时钟发生器的过滤器自动校准

    公开(公告)号：US20120098592A1

    公开(公告)日：2012-04-26

    申请号：US12910232

    申请日：2010-10-22

    申请人： Feng Wei Kuo ,  Mei-Show Chen ,  Chewn-Pu Jou ,  Ying-Ta Lu ,  Jia-Liang Chen

    发明人： Feng Wei Kuo ,  Mei-Show Chen ,  Chewn-Pu Jou ,  Ying-Ta Lu ,  Jia-Liang Chen

    IPC分类号： H03J3/02 ,  H03L7/00

    CPC分类号： H03H21/0067 ,  H03D3/007 ,  H03H2021/0081 ,  H03H2210/04 ,  H03J2200/08 ,  H03L7/07 ,  H03L7/0816 ,  H03L7/087 ,  H03L7/193 ,  H03L7/1976 ,  H04B1/30

    摘要： A filter auto-calibration system includes a multi-clock module. The multi-clock module includes a multi-clock generator that is configured to generate a clock signal with a variable frequency based on a channel setting. There is at least one filter to be calibrated. An auto-calibration control module is configured to control calibration of the at least one filter based on the channel setting. The multi-clock module is configured to supply the variable frequency clock signal to the at least one filter and to the auto-calibration control module, and the at least one filter is coupled to the auto-calibration control module.

    摘要翻译： 滤波器自动校准系统包括多时钟模块。 多时钟模块包括多时钟发生器，其被配置为基于通道设置产生具有可变频率的时钟信号。 至少有一个要校准的过滤器。 自动校准控制模块被配置为基于通道设置来控制至少一个滤波器的校准。 多时钟模块被配置为将可变频率时钟信号提供给至少一个滤波器和自动校准控制模块，并且至少一个滤波器耦合到自动校准控制模块。

    Impedance matching circuit for rejecting an image signal via a microstrip structure
    5.
    发明授权
    Impedance matching circuit for rejecting an image signal via a microstrip structure 失效
    用于通过微带结构拒绝图像信号的阻抗匹配电路

    公开(公告)号：US06816030B2

    公开(公告)日：2004-11-09

    申请号：US10065290

    申请日：2002-10-01

    申请人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Cheng-Cheng Liu

    发明人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Cheng-Cheng Liu

    IPC分类号： H01P1203

    CPC分类号： H01P5/02

    摘要： An impedance matching circuit for providing a lossless target signal transmission and rejecting image signals of heterodyne and super-heterodyne transceiver. The impedance matching circuit includes a grounded metal membrane, a first microstrip line connected with an input circuit, a second microstrip line connected with an output circuit, and a third microstrip line connected with either the first microstrip line or the second microstrip line. The first microstrip line is not connected with the second microstrip line, and the length of the third microstrip line is equal to a quarter wavelength of an image signal. When the target signal and the image signal transmit to the impedance matching circuit, the image signal will bypass to a grounded metal membrane, and the target signal will transmit to the output circuit without signal decay through electromagnetic coupling of the first microstrip line and the second microstrip line.

    Low-phase-noise oscillator with a microstrip resonator
    7.
    发明授权
    Low-phase-noise oscillator with a microstrip resonator 失效
    具有微带谐振器的低相位振荡器

    公开(公告)号：US06714088B2

    公开(公告)日：2004-03-30

    申请号：US10065292

    申请日：2002-10-01

    申请人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Shi-Wei Kuo

    发明人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Shi-Wei Kuo

    IPC分类号： H03B714

    CPC分类号： H03B5/1847

    摘要： A low-phase noise oscillator with a microstrip resonator for generating a target signal with a predetermined frequency is provided. The resonator includes a first microstrip line and a second microstrip line. The first microstrip line is parallel with the second microstrip line without having any contact. A length of the first microstrip line equals a length of the second microstrip line, and the length equals a quarter wavelength of the target signal. When a plurality of oscillating signals is transmitted to the first microstrip line, one of the oscillating signals having the predetermined frequency will be output from the resonator by an electromagnetic coupling generated between the first microstrip line and the second microstrip line.

    摘要翻译： 提供具有用于产生具有预定频率的目标信号的微带谐振器的低相位噪声振荡器。 谐振器包括第一微带线和第二微带线。 第一条微带线与第二条微带线并联，没有任何接触。 第一微带线的长度等于第二微带线的长度，并且长度等于目标信号的四分之一波长。 当多个振荡信号被发送到第一微带线时，具有预定频率的振荡信号中的一个将通过在第一微带线和第二微带线之间产生的电磁耦合从谐振器输出。

    Apparatus of dual-monitor portable computer and operational method thereof
    8.
    发明申请
    Apparatus of dual-monitor portable computer and operational method thereof 审中-公开
    双显示器便携式计算机的装置及其操作方法

    公开(公告)号：US20060248363A1

    公开(公告)日：2006-11-02

    申请号：US11414224

    申请日：2006-05-01

    申请人： Jia-Liang Chen ,  Shu-Mai Chang ,  Pao-Chang Lin

    发明人： Jia-Liang Chen ,  Shu-Mai Chang ,  Pao-Chang Lin

    IPC分类号： G06F1/00

    CPC分类号： G06F1/1616 ,  G06F1/1647 ,  G06F1/1686

    摘要： An apparatus of dual-monitor portable computer and operational method thereof is a portable computer with another sub-monitor which is configured on the lid. The sub-monitor can display different menu for the user to determine which functionality shall execute. The apparatus includes at least CPU, north bridge chipset, south bridge chipset, system memory, a first display monitor, coupling to the north bridge chipset, and a secondary display monitor, the sub-monitor coupling to a keyboard controller and a programmable logic controller. The apparatus also includes BIOS and a or plurality of hotkeys, coupling to the keyboard controller, to assist the user's operation.

    摘要翻译： 双监视便携式计算机的装置及其操作方法是具有配置在盖上的另一个子监视器的便携式计算机。 子监视器可以显示用户的不同菜单，以确定哪些功能将执行。 该装置至少包括CPU，北桥芯片组，南桥芯片组，系统存储器，第一显示监视器，与北桥芯片组的耦合，以及辅助显示器监视器，子监视器耦合到键盘控制器和可编程逻辑控制器 。 该装置还包括BIOS和一个或多个热键，耦合到键盘控制器，以帮助用户的操作。