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20 条记录 (耗时 0.035 秒)

    Frequency synthesizer with loop filter calibration for bandwidth control
    4.
    发明授权
    Frequency synthesizer with loop filter calibration for bandwidth control 有权
    带循环滤波器校准的频率合成器，用于带宽控制

    公开(公告)号：US07259633B2

    公开(公告)日：2007-08-21

    申请号：US11137210

    申请日：2005-05-24

    申请人： Chang-Hyeon Lee ,  Akbar Ali

    发明人： Chang-Hyeon Lee ,  Akbar Ali

    IPC分类号： H03L7/00 ,  H03L7/093

    CPC分类号： H03L7/093 ,  H03C3/0925 ,  H03C3/0933 ,  H03L7/07 ,  H03L7/0891 ,  H03L7/197 ,  H03L7/1976

    摘要： According to one exemplary embodiment, a frequency synthesizer module includes a loop filter, where the loop filter includes a capacitor having a first terminal and a second terminal. The frequency synthesizer module further includes a loop filter calibration module coupled to the capacitor in the loop filter. The loop filter calibration module causes an initial capacitance between the first terminal and the second terminal of the capacitor to increase to a target capacitance when the loop filter is in a calibration mode. The target capacitance can causes in increase in control of a bandwidth of the loop filter and a reduction in percent error of a unity gain bandwidth of the loop filter. The loop filter further includes a switched capacitor array configured to cause the initial capacitance to increase to the target capacitance in response to a digital feedback signal provided by the loop filter calibration module.

    摘要翻译： 根据一个示例性实施例，频率合成器模块包括环路滤波器，其中环路滤波器包括具有第一端子和第二端子的电容器。 频率合成器模块还包括耦合到环路滤波器中的电容器的环路滤波器校准模块。 当环路滤波器处于校准模式时，环路滤波器校准模块使得电容器的第一端子和第二端子之间的初始电容增加到目标电容。 目标电容可以导致环路滤波器的带宽的控制的增加和环路滤波器的单位增益带宽的百分比误差的减小。 环路滤波器还包括开关电容器阵列，其被配置为响应于由环路滤波器校准模块提供的数字反馈信号而使初始电容增加到目标电容。

    Frequency synthesizer with loop filter calibration for bandwidth control
    5.
    发明申请
    Frequency synthesizer with loop filter calibration for bandwidth control 有权
    带循环滤波器校准的频率合成器，用于带宽控制

    公开(公告)号：US20060267697A1

    公开(公告)日：2006-11-30

    申请号：US11137210

    申请日：2005-05-24

    申请人： Chang-Hyeon Lee ,  Akbar Ali

    发明人： Chang-Hyeon Lee ,  Akbar Ali

    IPC分类号： H03L7/00

    CPC分类号： H03L7/093 ,  H03C3/0925 ,  H03C3/0933 ,  H03L7/07 ,  H03L7/0891 ,  H03L7/197 ,  H03L7/1976

    摘要： According to one exemplary embodiment, a frequency synthesizer module includes a loop filter, where the loop filter includes a capacitor having a first terminal and a second terminal. The frequency synthesizer module further includes a loop filter calibration module coupled to the capacitor in the loop filter. The loop filter calibration module causes an initial capacitance between the first terminal and the second terminal of the capacitor to increase to a target capacitance when the loop filter is in a calibration mode. The target capacitance can causes in increase in control of a bandwidth of the loop filter and a reduction in percent error of a unity gain bandwidth of the loop filter. The loop filter further includes a switched capacitor array configured to cause the initial capacitance to increase to the target capacitance in response to a digital feedback signal provided by the loop filter calibration module.

    摘要翻译： 根据一个示例性实施例，频率合成器模块包括环路滤波器，其中环路滤波器包括具有第一端子和第二端子的电容器。 频率合成器模块还包括耦合到环路滤波器中的电容器的环路滤波器校准模块。 当环路滤波器处于校准模式时，环路滤波器校准模块使得电容器的第一端子和第二端子之间的初始电容增加到目标电容。 目标电容可以导致环路滤波器的带宽的控制的增加和环路滤波器的单位增益带宽的百分比误差的减小。 环路滤波器还包括开关电容器阵列，其被配置为响应于由环路滤波器校准模块提供的数字反馈信号而使初始电容增加到目标电容。

    Direct modulator for shift keying modulation
    6.
    发明授权
    Direct modulator for shift keying modulation 有权
    用于移位键控调制的直接调制器

    公开(公告)号：US07109805B2

    公开(公告)日：2006-09-19

    申请号：US10902746

    申请日：2004-07-29

    申请人： Chang-Hyeon Lee ,  Hoon Lee ,  Akbar Ali

    发明人： Chang-Hyeon Lee ,  Hoon Lee ,  Akbar Ali

    IPC分类号： H03L7/00 ,  H03C3/06 ,  H03M3/00

    CPC分类号： H03C3/0933 ,  H03C3/0925

    摘要： A system for direct modulation is disclosed. Embodiments of the direct modulator for shift-keying modulation include impressing baseband data on a radio frequency (RF) signal at an oscillator by controlling a digital divider using a sigma-delta modulator.

    摘要翻译： 公开了一种用于直接调制的系统。 用于移位键控调制的直接调制器的实施例包括通过使用Σ-Δ调制器控制数字分频器在振荡器处对射频（RF）信号施加基带数据。

    Apparatus and method for detecting an abnormality in a recorded signal
    7.
    发明授权
    Apparatus and method for detecting an abnormality in a recorded signal 失效
    用于检测记录信号中的异常的装置和方法

    公开(公告)号：US06747828B2

    公开(公告)日：2004-06-08

    申请号：US09789822

    申请日：2001-02-22

    申请人： Chang-Hyeon Lee

    发明人： Chang-Hyeon Lee

    IPC分类号： G11B509

    CPC分类号： G11B5/534 ,  G11B5/0086 ,  G11B5/53 ,  G11B15/04 ,  G11B15/087 ,  G11B15/125 ,  G11B27/34 ,  G11B27/36 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2545 ,  G11B2220/90

    摘要： An apparatus for detecting an abnormality of a recorded signal of a recorder/player includes a plurality of recording/reproducing heads for recording/reproducing a signal onto/from a medium, and a determining portion for determining an abnormality of the recorded signal based on the signal reproduced by the recording/reproducing heads. While one recording/reproducing head records the signal of image and/or sound on the medium, the other recording/reproducing head reproduces the signal recorded by the recording/reproducing head. The determining portion determines the abnormality of the recorded signal by determining whether or not the signal reproduced from the medium is in a normal data format, or by determining whether or not an envelope of reproduced signals is greater than a predetermined level. Accordingly, when abnormality of recorded signal occurs due to a presence of foreign substances on the heads or from other problem sources, a user is immediately notified of such an abnormality.

    摘要翻译： 一种用于检测记录器/播放器的记录信号的异常的装置包括：用于在/从介质上记录/再现信号的多个记录/再现头，以及用于基于该记录信号确定记录信号的异常的确定部分 由记录/再现头再现的信号。 虽然一个记录/再现头在介质上记录图像和/或声音的信号，但是另一个记录/再现头再现由记录/再现头记录的信号。 确定部分通过确定从介质再现的信号是否为正常数据格式，或通过确定再现信号的包络是否大于预定电平来确定记录信号的异常。 因此，当由于头部或其他问题源上的异物的存在而发生记录信号的异常时，立即通知用户这种异常。

    Low drop out voltage regulator circuit assembly
    8.
    发明授权
    Low drop out voltage regulator circuit assembly 有权
    低压降电压调节器电路组件

    公开(公告)号：US07898230B2

    公开(公告)日：2011-03-01

    申请号：US12471515

    申请日：2009-05-26

    申请人： Chang-Hyeon Lee ,  Joshua Cho ,  Pete Good

    发明人： Chang-Hyeon Lee ,  Joshua Cho ,  Pete Good

    IPC分类号： G05F1/40 ,  G05F5/00

    CPC分类号： G05F1/575

    摘要： An integrated circuit assembly includes a voltage level generator, a level shifter, a bandgap reference generator and a voltage regulator. The voltage level generator generates output voltage level signals in response to a supply voltage. The level shifter receives the output voltage level signals from the voltage level generator and generates first and second sets of control signals. The bandgap reference generator receives a reference voltage input and generates a bandgap reference signal. The voltage regulator receives a supply voltage, the bandgap reference signal the first and second sets of control signals from the level shifter and generates a constant output voltage under varying circuit conditions.

    摘要翻译： 集成电路组件包括电压电平发生器，电平转换器，带隙基准发生器和电压调节器。 电压电平发生器响应于电源电压产生输出电压电平信号。 电平移位器从电压电平发生器接收输出电压电平信号，并产生第一组和第二组控制信号。 带隙参考发生器接收参考电压输入并产生带隙参考信号。 电压调节器接收电源电压，带隙参考信号来自电平移位器的第一和第二组控制信号，并在变化的电路条件下产生恒定的输出电压。