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公开(公告)号:US20050048936A1
公开(公告)日:2005-03-03
申请号:US10695758
申请日:2003-10-30
申请人: Young Jin Lee , Hyo Seok Kwon , Won Jin Baek , Jin Taek Lee , Hyun Hwan Yoo , Jeong Ki Choi
发明人: Young Jin Lee , Hyo Seok Kwon , Won Jin Baek , Jin Taek Lee , Hyun Hwan Yoo , Jeong Ki Choi
CPC分类号: H03J1/0041 , H03J2200/02
摘要: Disclosed herein is a digital automatic fine tuning method and apparatus, which is capable of detecting a difference between a nominal frequency and an intermediate frequency generated in a tuner using a counter, and applying the counted data of the counter as a fine tuning value for the intermediate frequency without using a decoder by controlling the reset and preset operations of the counter that counts the frequency of the intermediate frequency.
摘要翻译: 这里公开了一种数字自动微调方法和装置,其能够使用计数器检测在调谐器中产生的标称频率和中频之间的差异,并将计数器的计数数据应用于微调值 通过控制对中频的频率进行计数的计数器的复位和预置操作而不使用解码器的中频。
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公开(公告)号:US07076221B2
公开(公告)日:2006-07-11
申请号:US10695758
申请日:2003-10-30
申请人: Young Jin Lee , Hyo Seok Kwon , Won Jin Baek , Jin Taek Lee , Hyun Hwan Yoo , Jeong Ki Choi
发明人: Young Jin Lee , Hyo Seok Kwon , Won Jin Baek , Jin Taek Lee , Hyun Hwan Yoo , Jeong Ki Choi
CPC分类号: H03J1/0041 , H03J2200/02
摘要: Disclosed herein is a digital automatic fine tuning method and apparatus, which is capable of detecting a difference between a nominal frequency and an intermediate frequency generated in a tuner using a counter, and applying the counted data of the counter as a fine tuning value for the intermediate frequency without using a decoder by controlling the reset and preset operations of the counter that counts the frequency of the intermediate frequency.
摘要翻译: 这里公开了一种数字自动微调方法和装置,其能够使用计数器检测在调谐器中产生的标称频率和中频之间的差异,并将计数器的计数数据应用于微调值 通过控制对中频的频率进行计数的计数器的复位和预置操作而不使用解码器的中频。
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公开(公告)号:US07282969B2
公开(公告)日:2007-10-16
申请号:US11380917
申请日:2006-04-28
申请人: Sung Cheol Shin , Yoo Hwan Kim , Ki Sung Kwon , Soo Woong Lee , Jin Taek Lee , Yo Sub Moon
发明人: Sung Cheol Shin , Yoo Hwan Kim , Ki Sung Kwon , Soo Woong Lee , Jin Taek Lee , Yo Sub Moon
IPC分类号: H03K21/00
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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公开(公告)号:US07463100B2
公开(公告)日:2008-12-09
申请号:US11549046
申请日:2006-10-12
申请人: Yoo Hwan Kim , Ki Sung Kwon , Soo Woong Lee , Jin Taek Lee , Yo Sub Moon , Sung Cheol Shin , Gyu Suck Kim
发明人: Yoo Hwan Kim , Ki Sung Kwon , Soo Woong Lee , Jin Taek Lee , Yo Sub Moon , Sung Cheol Shin , Gyu Suck Kim
IPC分类号: H03L7/00
CPC分类号: H03L7/087 , H03D13/003 , H03D13/004 , H03L7/085 , H03L7/18
摘要: A phase frequency detector for improving in-band phase noise characteristics of a PLL is disclosed. The phase frequency detector compares a reference frequency with a division frequency created by dividing an output frequency of a voltage controlled oscillator (VCO) by a predetermined division ratio, creates a phase-difference signal corresponding to a phase difference between the reference frequency and the division frequency, and improves noise characteristics.
摘要翻译: 公开了一种用于改善PLL的带内相位噪声特性的相位频率检测器。 相位频率检测器将参考频率与通过将压控振荡器(VCO)的输出频率除以预定分频比而产生的分频,将与基准频率和分频之间的相位差相对应的相位差信号进行比较 频率,并改善噪声特性。
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