公开(公告)号：US08350608B2

公开(公告)日：2013-01-08

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：US08264293B2

公开(公告)日：2012-09-11

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： H03B5/08

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：US08446194B2

公开(公告)日：2013-05-21

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：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：US08274317B2

公开(公告)日：2012-09-25

申请号：US12882132

申请日：2010-09-14

申请人： Sang Hyun Cho ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Seung Tak Ryu

发明人： Sang Hyun Cho ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Seung Tak Ryu

IPC分类号： H03L7/06

CPC分类号： H03L7/0995 ,  H03L7/099 ,  H03L2207/06

摘要： A phase-locked loop (PLL) circuit including a voltage-controlled oscillator (VCO) with a variable gain is provided. A phase frequency detector (PFD) detects a phase difference between a reference signal and a PLL feedback signal. A charge pump and a loop filter sequentially process an output signal of the PFD. A VCO has different gains according to a mode transition. A control voltage applied to the VCO is selected from an output signal of the loop filter and an additional control signal according to the mode transition.

摘要翻译： 提供了包括具有可变增益的压控振荡器（VCO）的锁相环（PLL）电路。 相位频率检测器（PFD）检测参考信号和PLL反馈信号之间的相位差。 电荷泵和环路滤波器依次处理PFD的输出信号。 根据模式转换，VCO具有不同的增益。 根据模式转换，从环路滤波器的输出信号和附加控制信号中选择施加到VCO的控制电压。

公开(公告)号：US20110148485A1

公开(公告)日：2011-06-23

申请号：US12882132

申请日：2010-09-14

申请人： Sang Hyun CHO ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Seung Tak Ryu

发明人： Sang Hyun CHO ,  Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Seung Tak Ryu

IPC分类号： H03L7/06

CPC分类号： H03L7/0995 ,  H03L7/099 ,  H03L2207/06

摘要： A phase-locked loop (PLL) circuit including a voltage-controlled oscillator (VCO) with a variable gain is provided. A phase frequency detector (PFD) detects a phase difference between a reference signal and a PLL feedback signal. A charge pump and a loop filter sequentially process an output signal of the PFD. A VCO has different gains according to a mode transition. A control voltage applied to the VCO is selected from an output signal of the loop filter and an additional control signal according to the mode transition.

摘要翻译： 提供了包括具有可变增益的压控振荡器（VCO）的锁相环（PLL）电路。 相位频率检测器（PFD）检测参考信号和PLL反馈信号之间的相位差。 电荷泵和环路滤波器依次处理PFD的输出信号。 根据模式转换，VCO具有不同的增益。 根据模式转换，从环路滤波器的输出信号和附加控制信号中选择施加到VCO的控制电压。

公开(公告)号：US08217728B2

公开(公告)日：2012-07-10

申请号：US12878697

申请日：2010-09-09

申请人： Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Jong Dae Kim

发明人： Hui Dong Lee ,  Kwi Dong Kim ,  Jong Kee Kwon ,  Jong Dae Kim

IPC分类号： H03B5/12 ,  H03C3/22

CPC分类号： H03B5/1228 ,  H03B5/1215 ,  H03B5/124 ,  H03B5/1265 ,  H03B5/1293

摘要： An LC voltage-controlled oscillator (VCO) is provided. The LC VCO includes an LC resonant circuit including at least one inductor whose both terminals are connected to output nodes and at least one capacitor connected in parallel with the inductor, and an amplifier circuit including at least one pair of switching transistors. Here, drains of the pair of switching transistors are connected to the output nodes respectively, and gates of the switching transistors are connected with the drains through a variable capacitance block exhibiting different characteristics according to an input signal.

摘要翻译： 提供了一个LC压控振荡器（VCO）。 LC VCO包括LC谐振电路，其包括至少一个电感器，其两个端子连接到输出节点和与电感器并联连接的至少一个电容器，以及包括至少一对开关晶体管的放大器电路。 这里，一对开关晶体管的漏极分别连接到输出节点，并且开关晶体管的栅极通过根据输入信号呈现不同特性的可变电容块与漏极连接。

公开(公告)号：US08040156B2

公开(公告)日：2011-10-18

申请号：US12466283

申请日：2009-05-14

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

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

IPC分类号： H03K5/19

CPC分类号： H03L7/095

摘要： Provided are a lock detection circuit and a lock detecting method. The lock detection circuit includes two delay devices, four flip-flops and two logic gates, and can accurately detect a lock state of a phase locked loop (PLL) circuit. Therefore, the lock detection circuit can be implemented in a simple structure, and as a result, the lock detection circuit can be compact in size and can consume less electric power. Also, the lock detecting method enables lock detection process to be simpler, so that a lock state can be detected within a short time period.

摘要翻译： 提供锁定检测电路和锁定检测方法。 锁定检测电路包括两个延迟器件，四个触发器和两个逻辑门，并且可以精确地检测锁相环（PLL）电路的锁定状态。 因此，可以以简单的结构实现锁定检测电路，结果，锁定检测电路的尺寸可以小巧，并且可以消耗更少的电力。 此外，锁定检测方法使得锁定检测处理更简单，从而可以在短时间内检测锁定状态。

公开(公告)号：US20100156544A1

公开(公告)日：2010-06-24

申请号：US12507687

申请日：2009-07-22

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

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

IPC分类号： H03K3/03

CPC分类号： H03K3/0322 ,  H03K2005/00045 ,  H03K2005/00058 ,  H03L7/0995

摘要： Provided is a ring oscillator having an extended range of oscillation frequency by varactors coupled to delay cells even in a simple structure. The wide frequency range results from simply varying an oscillation frequency by control signals applied to the varactors. Since additional switches connected to the delay cells contribute to increase or decrease of the oscillation frequency range, the ring oscillator can conveniently be employed in various types of oscillation systems.

摘要翻译： 提供一种环形振荡器，即使在简单的结构中，也可以通过连接到延迟单元的变容二极管具有扩展的振荡频率范围。 宽频率范围是通过施加到变容二极管的控制信号简单地改变振荡频率。 由于连接到延迟单元的附加开关有助于振荡频率范围的增加或减少，因此环形振荡器可以方便地用于各种类型的振荡系统。