Digital-type delay locked loop with expanded input locking range
    1.
    发明授权
    Digital-type delay locked loop with expanded input locking range 失效
    带扩展输入锁定范围的数字式延时锁定环

    公开(公告)号:US6005426A

    公开(公告)日:1999-12-21

    申请号:US73746

    申请日:1998-05-06

    CPC classification number: H03L7/0814 H03L7/10

    Abstract: A low-jitter delay locked loop having an expanded phase locking range without the necessity of setting the initial delay is provided. The loop is to be supplied by a system clock and includes a pulse generator receiving the system clock for generating a first pulse signal and a second pulse signal in response to a triggering signal, a delay device receiving the system clock for providing a delayed clock in response to a control signal, a frequency-reducing device for frequency-reducing the system clock into a first clock in response to the first pulse signal and frequency-reducing the delayed clock into a second clock in response to the second pulse signal, and a comparator for comparing the first and second clocks to generate the control signal.

    Abstract translation: 提供具有扩展相位锁定范围的低抖动延迟锁定环,而不需要设置初始延迟。 该回路由系统时钟提供,并且包括接收用于响应于触发信号产生第一脉冲信号和第二脉冲信号的系统时钟的脉冲发生器,延迟装置接收用于提供延迟时钟的系统时钟 响应于控制信号的频率降低装置,用于响应于第一脉冲信号将系统时钟频率降低到第一时钟并响应于第二脉冲信号将延迟的时钟频率降低到第二时钟的频率降低装置,以及 比较器,用于比较第一和第二时钟以产生控制信号。

    Method and device for signal testing
    2.
    发明授权
    Method and device for signal testing 有权
    用于信号测试的方法和装置

    公开(公告)号:US06233528B1

    公开(公告)日:2001-05-15

    申请号:US09148949

    申请日:1998-09-08

    CPC classification number: G01R31/31709 G01R31/3016

    Abstract: A signal-testing device used with a tester for testing a first signal and a second signal includes a selected signal generator receiving first signal and second signal for generating a selected signal the state of which is changed when first signal and second signal are in specific states, and a signal selector for selectively outputting one of first and second signals in response to the selected signal state. The present invention also provides a signal-testing method including steps of a) generating a selected signal having a plurality of pulses in response to a first signal and a second signal, b) obtaining a plurality of time differences between times when two inter-adjacent respective pulses respectively reach a specific voltage, c) obtaining a plurality of absolute values between two inter-adjacent respective time differences, and d) obtaining a phase difference by dividing by 2 an average value of the absolute values.

    Abstract translation: 与用于测试第一信号和第二信号的测试仪一起使用的信号测试装置包括接收第一信号的选择信号发生器和用于产生当第一信号和第二信号处于特定状态时其状态改变的选择信号的第二信号 以及信号选择器,用于响应于所选择的信号状态选择性地输出第一和第二信号之一。 本发明还提供了一种信号测试方法,包括以下步骤:a)响应于第一信号和第二信号产生具有多个脉冲的选定信号,b)获得两个相邻时间之间的多个时间差 各个脉冲分别达到特定电压,c)在两个相邻的相应时间差之间获得多个绝对值,以及d)通过将绝对值的平均值除以2来获得相位差。

    Phase lock loop (PLL) clock generator with programmable skew and frequency
    3.
    发明授权
    Phase lock loop (PLL) clock generator with programmable skew and frequency 有权
    具有可编程偏移和频率的锁相环(PLL)时钟发生器

    公开(公告)号:US06687320B1

    公开(公告)日:2004-02-03

    申请号:US09322072

    申请日:1999-05-27

    CPC classification number: H03L7/081 G06F1/08 G06F1/10 H03L7/18

    Abstract: A phase lock loop (PLL) clock generator with programmable frequency and skew is provided in the present invention, in which frequency of clock signals generated can be dynamically changed and skew of the clock signals generated can be dynamically adjusted by a computer program. Also, the signal skew due to the change of loading can be compensated. Therefore, the PLL clock generator based on a closed-loop configuration can better control the skew of clock signals to provide higher stability and durability to the system.

    Abstract translation: 在本发明中提供了具有可编程频率和偏斜的锁相环(PLL)时钟发生器,其中产生的时钟信号的频率可以被动态地改变,并且可以通过计算机程序动态地调整产生的时钟信号的偏移。 此外,可以补偿由于负载变化引起的信号偏移。 因此,基于闭环配置的PLL时钟发​​生器可以更好地控制时钟信号的偏斜,为系统提供更高的稳定性和耐久性。

    Monitoring camera
    4.
    发明授权
    Monitoring camera 有权
    监控摄像机

    公开(公告)号:US08174573B2

    公开(公告)日:2012-05-08

    申请号:US12204871

    申请日:2008-09-05

    CPC classification number: H04N5/2252 G08B13/19619

    Abstract: A monitoring camera has a base, a camera module and a casing. The base has a parapet formed on the base. The parapet has a memory slot and at least one pair of guide slots formed oppositely on the parapet. Each guide slot has a notch extending toward the bottom of the parapet. The casing corresponds to and covers the parapet and has at least one pair of guide protrusions formed on the casing. The guide protrusions respectively engage corresponding guide slots. When unscrewing the casing, the guide protrusions will correspondingly move and be mounted in the notches and the memory slot is accessible. Therefore, the casing need not to be completely detached from the base to allow a removable memory to be installed or removed easily.

    Abstract translation: 监控摄像机具有基座,相机模块和外壳。 基地有一个在基地形成的护栏。 护栏具有存储槽和在栏杆上相对形成的至少一对引导槽。 每个导槽具有向栏杆底部延伸的凹口。 壳体对应于并且覆盖栏杆并且具有形成在壳体上的至少一对引导突起。 引导突起分别接合相应的引导槽。 当旋转外壳时,引导突起将相应地移动并安装在凹口中,并且存储器插槽可接近。 因此,壳体不需要从基座完全分离,从而容易地安装或移除可移动存储器。

    Monitoring Camera
    5.
    发明申请
    Monitoring Camera 有权
    监控摄像机

    公开(公告)号:US20100060731A1

    公开(公告)日:2010-03-11

    申请号:US12204871

    申请日:2008-09-05

    CPC classification number: H04N5/2252 G08B13/19619

    Abstract: A monitoring camera has a base, a camera module and a casing. The base has a parapet formed on the base. The parapet has a memory slot and at least one pair of guide slots formed oppositely on the parapet. Each guide slot has a notch extending toward the bottom of the parapet. The casing corresponds to and covers the parapet and has at least one pair of guide protrusions formed on the casing. The guide protrusions respectively engage corresponding guide slots. When unscrewing the casing, the guide protrusions will correspondingly move and be mounted in the notches and the memory slot is accessible. Therefore, the casing need not to be completely detached from the base to allow a removable memory to be installed or removed easily.

    Abstract translation: 监控摄像机具有基座,相机模块和外壳。 基地有一个在基地形成的护栏。 护栏具有存储槽和在栏杆上相对形成的至少一对引导槽。 每个导槽具有向栏杆底部延伸的凹口。 壳体对应于并且覆盖栏杆并且具有形成在壳体上的至少一对引导突起。 引导突起分别接合相应的引导槽。 当旋转外壳时,引导突起将相应地移动并安装在凹口中,并且存储器插槽可接近。 因此,壳体不需要从基座完全分离,从而容易地安装或移除可移动存储器。

    Clock recovery circuit and related methods
    6.
    发明授权
    Clock recovery circuit and related methods 有权
    时钟恢复电路及相关方法

    公开(公告)号:US07016450B2

    公开(公告)日:2006-03-21

    申请号:US10064215

    申请日:2002-06-21

    CPC classification number: H03L7/0891 H03L7/093 H03L7/18

    Abstract: A clock recovery circuit for generating an output signal that is synchronized with an input signal. The clock recovery circuit includes a charge pump, a first filter, an oscillator, a switch circuit, and a second filter. When the charge pump operates, the switch circuit will disconnect the first filter from the oscillator. Additionally, when the charge pump stops operating, the switch circuit will connect the first filter and the oscillator such that the oscillator adjusts a frequency or phase of the output signal according to the output voltage of the first filter.

    Abstract translation: 一种用于产生与输入信号同步的输出信号的时钟恢复电路。 时钟恢复电路包括电荷泵,第一滤波器,振荡器,开关电路和第二滤波器。 当电荷泵运行时,开关电路将使第一个滤波器与振荡器断开。 此外,当电荷泵停止工作时,开关电路将连接第一滤波器和振荡器,使得振荡器根据第一滤波器的输出电压来调节输出信号的频率或相位。

    Active hybrid circuit for a full duplex channel
    7.
    发明授权
    Active hybrid circuit for a full duplex channel 有权
    用于全双工通道的主动混合电路

    公开(公告)号:US07106235B1

    公开(公告)日:2006-09-12

    申请号:US11139475

    申请日:2005-05-31

    CPC classification number: H04B1/58 H04B3/03

    Abstract: An active hybrid circuit for a full duplex channel generates a duplicated voltage at the current output stage to reduce the energy of the transmitter transmitted to the receiver. The active hybrid circuit cancels the energy of the transmitter transmitted to the receiver when it is operated in a full duplex channel with high-speed transmission. The active hybrid circuit for full a duplex channel comprises a transmit digital-to-analog converter for generating an analog transmit signal, a receive analog-to-digital converter for receiving an analog receive signal, a duplicated voltage digital-to-analog converter for generating a corresponding duplicated voltage according to the analog transmit signal of the transmit digital-to-analog converter, and a plurality of signal combiners for subtracting the duplicated voltage from the analog transmit signal to cancel the influence of analog transmit signal to the analog receive signal.

    Abstract translation: 用于全双工信道的主动混合电路在当前输出级产生复制电压,以减少发送到接收机的发射机的能量。 当主动混合电路在具有高速传输的全双工信道中工作时,消除发射到接收机的发射机的能量。 用于全双工通道的主动混合电路包括用于产生模拟发射信号的发射数模转换器,用于接收模拟接收信号的接收模数转换器,用于接收模拟接收信号的复制电压数/模转换器, 根据发射数模转换器的模拟发射信号产生相应的重复电压,以及多个信号组合器,用于从模拟发射信号中减去复制电压,以消除模拟发射信号对模拟接收信号的影响 。

    Device and method for measuring jitter in phase locked loops
    8.
    发明授权
    Device and method for measuring jitter in phase locked loops 有权
    用于测量锁相环路抖动的装置和方法

    公开(公告)号:US06859027B2

    公开(公告)日:2005-02-22

    申请号:US10064767

    申请日:2002-08-15

    CPC classification number: H03L7/089 H03D13/004 H03L7/0891

    Abstract: A device and method for measuring the jitters of phase locked loop signals. A phase lead or phase lag relationship between an input signal and an output signal of a phase locked loop is found. According to the phase relationship and using multiplexers, a first phase difference signal and a second phase difference signal are re-routed to a subtraction unit and produces a jitter-level output signal. The jitter-level output signal represents the absolute value of the difference of pulse width between the first phase difference signal and the second phase difference signal.

    Abstract translation: 一种用于测量锁相环信号抖动的装置和方法。 发现输入信号和锁相环路的输出信号之间的相位相位或相位滞后关系。 根据相位关系和使用多路复用器,将第一相位差信号和第二相位差信号重新路由到减法单元并产生抖动电平输出信号。 抖动电平输出信号表示第一相位差信号和第二相位差信号之间的脉冲宽度差的绝对值。

    Data converter with background auto-zeroing via active interpolation
    9.
    发明授权
    Data converter with background auto-zeroing via active interpolation 有权
    数据转换器通过有源插补进行背景自动归零

    公开(公告)号:US06856265B2

    公开(公告)日:2005-02-15

    申请号:US10604527

    申请日:2003-07-29

    CPC classification number: H03M1/1023 H03M1/0682 H03M1/1004 H03M1/206 H03M1/365

    Abstract: An analog-to-digital data converter converts an input signal to corresponding digital signals. The data converter includes two sets of comparison units arranged in an interlaced sense to alternatively analyze the input signal, generate digital signals corresponding to the result of comparing the input signal and reference signals. Each of the comparison units has a positive output and a negative output, and the digital signal is generated by the negative output and the positive output of the comparison units in a differential way. When the comparison units of one set are performing auto-zeroing, the comparison units of the other set perform the data conversion to generate corresponding digital signals.

    Abstract translation: 模拟数字数据转换器将输入信号转换成相应的数字信号。 数据转换器包括以隔行方式布置的两组比较单元,以交替地分析输入信号,产生对应于比较输入信号和参考信号的结果的数字信号。 每个比较单元具有正输出和负输出,并且数字信号以差分方式由负输出和比较单元的正输出产生。 当一组的比较单元正在执行自动归零时,另一组的比较单元执行数据转换以产生相应的数字信号。

    Data converter with background auto-zeroing via active interpolation
    10.
    发明授权
    Data converter with background auto-zeroing via active interpolation 有权
    数据转换器通过有源插补进行背景自动归零

    公开(公告)号:US06642866B2

    公开(公告)日:2003-11-04

    申请号:US10063204

    申请日:2002-03-28

    CPC classification number: H03M1/1004 H03M1/0682 H03M1/1023 H03M1/365

    Abstract: An analog-to-digital data converter converts an input signal to corresponding digital signals. The data converter includes two sets of comparison units arranged in an interlaced sense to alternatively analyze the input signal, generate digital signals corresponding to the result of comparing the input signal and reference signals. Each of the comparison units has a positive output and a negative output, and the digital signal is generated by the negative output and the positive output of the comparison units in a differential way. When the comparison units of one set are performing auto-zeroing, the comparison units of the other set perform the data conversion to generate corresponding digital signals.

    Abstract translation: 模拟数字数据转换器将输入信号转换成相应的数字信号。 数据转换器包括以隔行方式布置的两组比较单元,以交替地分析输入信号,产生对应于比较输入信号和参考信号的结果的数字信号。 每个比较单元具有正输出和负输出,并且数字信号以差分方式由负输出和比较单元的正输出产生。 当一组的比较单元正在执行自动归零时,另一组的比较单元执行数据转换以产生相应的数字信号。

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