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1. 发明申请

US20060284654A1 LOW DIVIDE RATIO PROGRAMABLE FREQUENCY DIVIDER AND METHOD THEREOF 失效
标题翻译：低分辨率可编程频率分频器及其方法
公开(公告)号：US20060284654A1
公开(公告)日：2006-12-21
申请号：US11380917
申请日：2006-04-28
申请人： Sung Shin , Yoo Kim , Ki Kwon , Soo Lee , Jin Lee , Yo Moon
发明人： Sung Shin , Yoo Kim , Ki Kwon , Soo Lee , Jin Lee , Yo Moon
IPC分类号： H03B19/00
CPC分类号： H03K23/68 , H03L7/1978
摘要： The invention provides a low divide ratio programmable frequency divider of a fractional-N type applied to a digital MOPLL tuner and a method thereof. In the invention, a divide ratio assigner assigns divide data as a main divide ratio and a pulse swallow value according to a first or a second dividing operation mode in response to a mode selection signal. A prescaler operates on the first or second divide operation mode in response to the mode selection signal. Also, a main counter divides a frequency from the prescaler by the main divide ratio. Further, a pulse swallow counter counts a clock of the main counter while outputting a pulse swallow signal to the prescaler. The pulse swallow signal has a swallow level if a counting value corresponds to the pulse swallow value, and a non-swallow level if the counting value does not correspond to the pulse swallow value.
摘要翻译：本发明提供一种应用于数字MOPLL调谐器的分数N型的低分频比可编程分频器及其方法。在本发明中，分频比分配器响应于模式选择信号，根据第一或第二分频操作模式分配除数数据作为主分频比和脉冲吞咽值。预分频器响应于模式选择信号在第一或第二除法运算模式下操作。另外，主计数器将预分频器的频率除以主分频比。此外，脉冲吞咽计数器计数主计数器的时钟，同时向预分频器输出脉冲吞咽信号。如果计数值对应于脉冲吞咽值，则脉冲吞咽信号具有吞咽水平，如果计数值与脉冲吞咽值不对应，则为非吞咽水平。

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