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    • 22. 发明授权
    • Method and enhanced phase locked loop circuits for implementing effective testing
    • 用于实现有效测试的方法和增强锁相环电路
    • US07538625B2
    • 2009-05-26
    • US11679323
    • 2007-02-27
    • Michael David CeskyJames David Strom
    • Michael David CeskyJames David Strom
    • H03L7/00H03L7/06
    • H03L7/1974G06F1/08
    • A method and enhanced phase-locked loop (PLL) circuit enable effective testing of the PLL. A phase frequency detector generates a differential signal, receiving a reference signal and a feedback signal of an output signal of the PLL circuit. A charge pump is coupled to the phase frequency detector receiving the differential signal. The charge pump applies either negative or positive charge pulses to a low-pass filter, which generates a tuning voltage input applied to a voltage controlled oscillator. A first divider is coupled to the voltage controlled oscillator receives and divides down the VCO output signal, providing the output signal of the PLL circuit. A second divider receives the output signal of the PLL circuit and provides the feedback signal to the phase frequency detector. The output signal of PLL circuit is applied to a clock distribution.
    • 一种方法和增强型锁相环(PLL)电路能够有效地测试PLL。 相位频率检测器产生差分信号,接收PLL电路的输出信号的参考信号和反馈信号。 电荷泵耦合到接收差分信号的相位频率检测器。 电荷泵将负电荷或正电荷脉冲施加到低通滤波器,产生施加到压控振荡器的调谐电压输入。 第一分频器耦合到压控振荡器接收并分频VCO输出信号,提供PLL电路的输出信号。 第二分频器接收PLL电路的输出信号,并将反馈信号提供给相位频率检测器。 PLL电路的输出信号应用于时钟分配。
    • 23. 发明申请
    • HIGH FREQUENCY DIVIDER STATE CORRECTION CIRCUIT
    • 高频分路器状态校正电路
    • US20080301503A1
    • 2008-12-04
    • US12187517
    • 2008-08-07
    • David William BoerstlerEric John LukesHiroki KiharaJames David Strom
    • David William BoerstlerEric John LukesHiroki KiharaJames David Strom
    • G06F11/28
    • H03K21/406G06F7/58
    • The present invention provides for a self-correcting state circuit. A first flip flop is configured to receive a clock input and a first data input, and to generate a first output in response to the clock input and the first data input. A second flip flop is coupled to the first flip flop and configured to receive the clock input and to receive the first output as a second data input, and to generate a second output in response to the clock input and the first output. A first correction circuit is coupled to the second flip flop and configured to generate a corrected output. A third flip flop is coupled to the first correction circuit and configured to receive the clock input and to receive the corrected output as a third data input, and to generate a third output in response to the clock input and the third data input.
    • 本发明提供一种自校正状态电路。 第一触发器被配置为接收时钟输入和第一数据输入,并且响应于时钟输入和第一数据输入而产生第一输出。 第二触发器耦合到第一触发器并且被配置为接收时钟输入并且接收第一输出作为第二数据输入,并且响应于时钟输入和第一输出而产生第二输出。 第一校正电路耦合到第二触发器并且被配置为产生校正输出。 第三触发器耦合到第一校正电路并且被配置为接收时钟输入并且接收校正的输出作为第三数据输入,并且响应于时钟输入和第三数据输入而产生第三输出。
    • 24. 发明申请
    • Method and Enhanced Phase Locked Loop Circuits for Implementing Effective Testing
    • 用于实现有效测试的方法和增强型锁相环电路
    • US20080204154A1
    • 2008-08-28
    • US11679323
    • 2007-02-27
    • Michael David CeskyJames David Strom
    • Michael David CeskyJames David Strom
    • H03J7/04
    • H03L7/1974G06F1/08
    • A method and enhanced phase-locked loop (PLL) circuit enable effective testing of the PLL. A phase frequency detector generates a differential signal, receiving a reference signal and a feedback signal of an output signal of the PLL circuit. A charge pump is coupled to the phase frequency detector receiving the differential signal. The charge pump applies either negative or positive charge pulses to a low-pass filter, which generates a tuning voltage input applied to a voltage controlled oscillator. A first divider is coupled to the voltage controlled oscillator receives and divides down the VCO output signal, providing the output signal of the PLL circuit. A second divider receives the output signal of the PLL circuit and provides the feedback signal to the phase frequency detector. The output signal of PLL circuit is applied to a clock distribution.
    • 一种方法和增强型锁相环(PLL)电路能够有效地测试PLL。 相位频率检测器产生差分信号,接收PLL电路的输出信号的参考信号和反馈信号。 电荷泵耦合到接收差分信号的相位频率检测器。 电荷泵将负电荷或正电荷脉冲施加到低通滤波器,产生施加到压控振荡器的调谐电压输入。 第一分频器耦合到压控振荡器接收并分频VCO输出信号,提供PLL电路的输出信号。 第二分频器接收PLL电路的输出信号,并将反馈信号提供给相位频率检测器。 PLL电路的输出信号应用于时钟分配。
    • 30. 发明申请
    • Method and Apparatus for Distributing Charge Pump Current and Voltage for PLL Circuits
    • 用于分配PLL电路的电荷泵电流和电压的方法和装置
    • US20080116959A1
    • 2008-05-22
    • US11872356
    • 2007-10-15
    • Katherine Ellen HirschJames David Strom
    • Katherine Ellen HirschJames David Strom
    • G05F1/10
    • H03L7/0891H03L7/18
    • A method and apparatus for distributing charge pump current and voltage for phase-locked loop circuits, and a design structure on which the subject circuit resides are provided. A charge pump implemented with a plurality of charge pump stages, each providing substantially equal charge pump current. Each stage includes a respective associated buffer for receiving an incoming increment (INC) signal and an incoming decrement (DEC) signal and providing an output time delayed INC signal and an output time delayed DEC. A chain of the buffers is provided to pass the time delayed INC signals and the time delayed DEC signals to the respective charge pump stages. Each of the charge pump stages includes an enable input arranged for independently enabling each respective charge pump stage.
    • 一种用于分配锁相环电路的电荷泵电流和电压的方法和装置,以及设置有被摄体电路的设计结构。 一种电荷泵,其具有多个电荷泵级,各自提供基本上相等的电荷泵电流。 每个级包括用于接收输入增量(INC)信号和进入递减(DEC)信号并提供输出时间延迟INC信号和输出时间延迟DEC的各自相关联的缓冲器。 提供缓冲器链以将时间延迟的INC信号和时间延迟的DEC信号传递到各个电荷泵级。 每个电荷泵级包括使能输入,其被布置用于独立地使能各个电荷泵级。