公开(公告)号：US20120056654A1

公开(公告)日：2012-03-08

申请号：US12976449

申请日：2010-12-22

申请人： HUI DONG LEE ,  Seok Ju YUN ,  Kwi Dong KIM ,  Jong-Kee KWON ,  Sang-Hyun CHO

发明人： HUI DONG LEE ,  Seok Ju YUN ,  Kwi Dong KIM ,  Jong-Kee KWON ,  Sang-Hyun CHO

IPC分类号： H03L7/06

CPC分类号： H03L7/083 ,  H03J2200/10 ,  H03L7/0891 ,  H03L7/0995 ,  H03L7/187

摘要： Provided is a PLL circuit including automatic frequency control circuit and an operating method thereof. The voltage controlled oscillator is primarily controlled by an automatic frequency control circuit, and is secondarily controlled by a loop filter. The voltage controlled oscillator outputs a coarsely-tuned oscillation signal when primarily controlled, and outputs a finely-tuned oscillation signal when secondarily controlled. The PLL circuit can have a quick frequency fixing time, and output the oscillation signal having a broad and stable frequency. Moreover, the noise characteristic of the PLL circuit is enhanced.

摘要翻译： 提供一种包括自动频率控制电路的PLL电路及其操作方法。 压控振荡器主要由自动频率控制电路控制，二次由环路滤波器控制。 压控振荡器在主要受控时输出粗调谐振荡信号，并在二次控制时输出微调振荡信号。 PLL电路可以具有快速的频率固定时间，并输出具有宽而稳定频率的振荡信号。 此外，提高了PLL电路的噪声特性。

公开(公告)号：US20110018644A1

公开(公告)日：2011-01-27

申请号：US12844686

申请日：2010-07-27

申请人： Seok Ju YUN ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon

发明人： Seok Ju YUN ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon

IPC分类号： H03B5/12

CPC分类号： H03B5/1228 ,  H03B5/1215 ,  H03B5/1218 ,  H03B5/1225 ,  H03B5/1253 ,  H03B5/1296

摘要： Provided is a transformer-based oscillator which is suited to oscillate frequencies in multiple bands. An oscillator includes a transformer resonance unit and a plurality of complementary transistors. The transformer resonance unit includes a primary coil and a secondary coil corresponding to the primary coil. The plurality of complementary transistors have gates and drains between which both ends of the transformer resonance unit are respectively connected. Thus, the oscillator may operate in a differential mode or common mode according to the phase of the transformer resonance unit. Also, a complementary transistor constituting a multiband oscillation loop may be independently connected to both ends of the transformer resonance unit, and an oscillation loop of at least one band may be selected out of a multiband oscillation loop using a switch unit. Thus, the oscillator may be suited to oscillate resonance frequencies in multiple bands.

摘要翻译： 提供了一种适用于在多个频带中振荡频率的基于变压器的振荡器。 振荡器包括变压器谐振单元和多个互补晶体管。 变压器谐振单元包括初级线圈和对应于初级线圈的次级线圈。 多个互补晶体管具有分别连接变压器谐振单元的两端的栅极和漏极。 因此，振荡器可以根据变压器谐振单元的相位以差模或共模工作。 此外，构成多频带振荡回路的互补晶体管可以独立地连接到变压器谐振单元的两端，并且可以使用开关单元从多频带振荡回路中选择至少一个频带的振荡回路。 因此，振荡器可以适合于振荡多个频带中的谐振频率。

公开(公告)号：US20120105114A1

公开(公告)日：2012-05-03

申请号：US13275753

申请日：2011-10-18

申请人： Seok Ju YUN ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong-Kee Kwon

发明人： Seok Ju YUN ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong-Kee Kwon

IPC分类号： H03L7/06

CPC分类号： H03L7/1976 ,  H03L7/0891

摘要： Provided is a spread spectrum clock generating circuit. The spread spectrum clock generating circuit includes: a phase detector receiving a reference frequency signal from the external and detecting a phase difference between the reference frequency signal and a frequency-divided signal; a voltage controlled oscillator outputting an oscillation signal corresponding to a detection result of the phase detector; a main divider generating the frequency-divided signal by dividing a frequency of the oscillation signal by a main dividing ratio; and a dividing ratio controller generating a variable count value, generating a sub dividing ratio by performing delta-sigma modulation according to the count value, and adjusting the main dividing ratio according to the sub dividing ratio.

摘要翻译： 提供了一种扩频时钟发生电路。 扩频时钟发生电路包括：相位检测器，从外部接收参考频率信号，并检测参考频率信号与分频信号之间的相位差; 输出与所述相位检测器的检测结果对应的振荡信号的压控振荡器; 主分压器，通过将振荡信号的频率除以主分频比来产生分频信号; 以及产生可变计数值的分频比控制器，通过根据计数值进行Δ-Σ调制而产生分分割比，并根据分分割比调节主分频比。

公开(公告)号：US20120146692A1

公开(公告)日：2012-06-14

申请号：US13243488

申请日：2011-09-23

申请人： Seok Ju YUN

发明人： Seok Ju YUN

IPC分类号： H03L7/087

CPC分类号： H03L7/087 ,  H03L7/0893 ,  H03L2207/06

摘要： Provided is a PLL circuit driven with a differential controlled voltage. The PLL circuit includes a VCO. The VCO outputs an oscillation signal in response to a difference between first and second control voltages. The PLL circuit includes a first loop for generating the first control voltage, and a second loop for generating the second control voltage having a phase opposite to the first control voltage. Intermediate generated signals of the first loop and intermediate generated signals of the second loop which respectively correspond to the intermediate generated signals of the first loop have opposed phases.

摘要翻译： 提供用差分控制电压驱动的PLL电路。 PLL电路包括VCO。 VCO响应于第一和第二控制电压之间的差异输出振荡信号。 PLL电路包括用于产生第一控制电压的第一回路和用于产生具有与第一控制电压相反的相位的第二控制电压的第二回路。 分别对应于第一回路的中间产生信号的第一回路的中间产生信号和第二回路的中间产生信号具有相对的相位。