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    • 8. 发明授权
    • Jitter compensated numerically controlled oscillator
    • 抖动补偿数控振荡器
    • US08674777B1
    • 2014-03-18
    • US13615482
    • 2012-09-13
    • Robert MackTimothy Chen
    • Robert MackTimothy Chen
    • H03L1/00
    • G06F1/022G06F1/0328G06F1/08H03B28/00H03B2200/0088H03L1/00H03L7/0994
    • A method for compensating NCO jitter by changing a step value used to increment an accumulator in the NCO to make up for inaccuracies, or jitters. In one approach, a remainder in the accumulator may be monitored and a compensated clock close to the current edge of an ideal clock may be generated. In another approach, a compensated clock close to the next edge of the ideal clock may be generated after the current edge of the ideal clock is missed. The step value may be stored in a memory, which may be a register. A jitter compensator may include a comparator for monitoring the remainder in the accumulator or a detector for detecting whether an ideal clock has been missed. The jitter compensator may also change the step value to a step value for a faster clock to compensate jitter.
    • 一种用于通过改变用于增加NCO中的累加器的步长值来补偿NCO抖动以补偿不准确或不稳定的方法。 在一种方法中,可以监视累加器中的余数,并且可以产生接近理想时钟的当前边缘的补偿时钟。 在另一种方法中,在理想时钟的当前边缘被错过之后,可以产生靠近理想时钟的下一个边缘的补偿时钟。 步数值可以存储在可以是寄存器的存储器中。 抖动补偿器可以包括用于监视累加器中的余数的比较器或用于检测是否错过理想时钟的检测器。 抖动补偿器还可以将步长值改变为更快时钟的步进值以补偿抖动。