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    • 3. 发明授权
    • Implementing phase locked loop (PLL) with enhanced locking capability with a wide range dynamic reference clock
    • 通过宽范围的动态参考时钟实现具有增强锁定能力的锁相环(PLL)
    • US08237510B2
    • 2012-08-07
    • US12858881
    • 2010-08-18
    • Joel T. FickeGrant P. KesselringJames D. Strom
    • Joel T. FickeGrant P. KesselringJames D. Strom
    • H03L7/085H03L7/089
    • H03L7/099H03L7/103
    • A method and a phase locked loop (PLL) circuit for implementing enhanced locking capability with a wide range dynamic reference clock, and a design structure on which the subject circuit resides are provided. The PLL circuit includes a Voltage Controlled Oscillator (VCO) and a plurality of filter comparators receiving a differential filter VCO control voltage. The plurality of filter comparators comparing the differential filter VCO control voltage values, provides a respective gate enable signal responsive to the compared differential filter VCO control voltage values. A clock signal is applied to an up/down counter responsive to the respective gate enable signal and the wide range dynamic reference clock. The count values of the up/down counter are provided to the VCO to select a respective frequency range for the VCO.
    • 一种用于实现具有宽范围动态参考时钟的增强锁定能力的方法和锁相环(PLL)电路,以及设置有被摄体电路所在的设计结构。 PLL电路包括压控振荡器(VCO)和接收差分滤波器VCO控制电压的多个滤波器比较器。 比较差分滤波器VCO控制电压值的多个滤波器比较器根据比较的差分滤波器VCO控制电压值提供相应的门控使能信号。 响应于相应的门使能信号和宽范围动态参考时钟,时钟信号被施加到向上/向下计数器。 将向上/向下计数器的计数值提供给VCO以选择VCO的相应频率范围。
    • 5. 发明授权
    • Implementing integral dynamic voltage sensing and trigger
    • 实现积分动态电压检测和触发
    • US08513957B2
    • 2013-08-20
    • US12792160
    • 2010-06-02
    • Kennedy K. CheruiyotJoel T. FickeDavid M. FriendGrant P. KesselringJames D. Strom
    • Kennedy K. CheruiyotJoel T. FickeDavid M. FriendGrant P. KesselringJames D. Strom
    • G01R29/26H03L7/00H03K3/03
    • G01R29/26
    • A method and circuit for implementing dynamic voltage sensing and a trigger circuit, and a design structure on which the subject circuits resides are provided. The voltage sensing circuit includes a first quiet oscillator generating a reference clock, and a second noisy oscillator generating a noisy clock. A digital control loop coupled to the first quiet oscillator and the second noisy oscillator matches frequency of the first quiet oscillator and the second noisy oscillator. The reference clock drives a first predefined-bit shift register and the noisy clock drives a second predefined-bit shift register, where the second predefined-bit shift register is greater than the first predefined-bit shift register. When the first predefined-bit shift register overflows, the contents of the second predefined-bit shift register are evaluated. The contents of the second predefined-bit shift register are compared with a noise threshold select value to identify a noise event and trigger a noise detector control output.
    • 一种用于实现动态电压感测和触发电路的方法和电路,以及提供对象电路所在的设计结构。 电压感测电路包括产生参考时钟的第一安静振荡器和产生噪声时钟的第二噪声振荡器。 耦合到第一安静振荡器和第二噪声振荡器的数字控制回路匹配第一安静振荡器和第二噪声振荡器的频率。 参考时钟驱动第一预定义位移位寄存器,并且噪声时钟驱动第二预定义位移位寄存器,其中第二预定义位移位寄存器大于第一预定义位移位寄存器。 当第一预定义位移位寄存器溢出时,第二预定义位移位寄存器的内容被评估。 将第二预定义位移位寄存器的内容与噪声阈值选择值进行比较,以识别噪声事件并触发噪声检测器控制输出。