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21. 发明授权

US07928806B2 Low voltage frequency synthesizer using boosting method for power supply voltage of charge pump 失效
标题翻译：低压频率合成器采用电荷泵电源电压升压方式
公开(公告)号：US07928806B2
公开(公告)日：2011-04-19
申请号：US12561910
申请日：2009-09-17
申请人： Hui Dong Lee , Kwi Dong Kim , Jong Kee Kwon , Jong Pil Hong , Sang Gug Lee
发明人： Hui Dong Lee , Kwi Dong Kim , Jong Kee Kwon , Jong Pil Hong , Sang Gug Lee
IPC分类号： H03B5/12 , H03L5/00 , H03L7/06 , H03L7/08 , H03L7/085 , H03L7/089 , H03L7/099 , H03L7/18
CPC分类号： H03L7/0891 , H03L5/00 , H03L7/099
摘要： Provided is a low voltage frequency synthesizer using a boosting method for a power supply voltage of a charge pump. The low voltage frequency synthesizer includes a phase/frequency detector (PFD) that receives and compares a reference frequency and a feedback frequency to output a comparison signal, a charge pump that receives the comparison signal to output a current corresponding to the comparison signal, a low-pass filter (LPF) that generates a voltage corresponding to the output current of the charge pump, a voltage controlled oscillator (VCO) that receives the voltage of the LPF, amplifies the voltage to generate a boosting voltage, and outputs a frequency corresponding to the received voltage, and a DC converter that receives the boosting voltage of the VCO, converts the boosting voltage into a DC voltage, and applies the DC voltage as a power supply voltage of the charge pump. Since the supply voltage of the charge pump is provided from the LC-circuit-based VCO, the frequency synthesizer has superior characteristics such as a wide locking range, low phase noise, and the prevention of performance degradation caused by an external environment or process variations.
摘要翻译：提供了使用电荷泵的电源电压的升压方法的低压频率合成器。所述低电压频率合成器包括接收比较参考频率和反馈频率以输出比较信号的相位/频率检测器（PFD），接收比较信号以输出与比较信号相对应的电流的电荷泵，产生与电荷泵的输出电流相对应的电压的低通滤波器（LPF），接收LPF电压的压控振荡器（VCO），放大电压以产生升压电压，并输出对应的频率以及接收VCO的升压电压的DC转换器，将升压电压转换成直流电压，并施加直流电压作为电荷泵的电源电压。由于电荷泵的电源电压是从基于LC电路的VCO提供的，因此频率合成器具有优异的特性，例如宽锁定范围，低相位噪声，以及防止由外部环境或工艺变化引起的性能下降。

22. 发明授权

US08274269B2 Switching circuit and small-size high-efficiency DC-DC converter for portable devices including the same 失效
标题翻译：用于便携式设备的开关电路和小型高效率DC-DC转换器
公开(公告)号：US08274269B2
公开(公告)日：2012-09-25
申请号：US12487596
申请日：2009-06-18
申请人： Kwi Dong Kim , Jong Kee Kwon , Jong Dae Kim , Yong Seo Koo
发明人： Kwi Dong Kim , Jong Kee Kwon , Jong Dae Kim , Yong Seo Koo
IPC分类号： G05F1/00
CPC分类号： H02M1/08 , H02M2001/0032 , Y02B70/16
摘要： Provided are a switching circuit and a small-size high-efficiency direct current-to-direct current (DC-DC) converter for portable devices including the same. Using dynamic threshold-complementary metal oxide semiconductor (DT-CMOS) transistors having dynamic threshold voltages as a switching device, the switching circuit maintains a low threshold voltage in a normal mode to improve current drivability while reducing conduction loss, and maintains a high threshold voltage in a standby mode to minimize power consumption. When the switching circuit is employed in a DC-DC converter, power conversion efficiency can be improved by reducing conduction loss in the normal mode, and power consumption can be minimized in the standby mode. Consequently, the DC-DC converter can maximize a use time of a battery of a portable device and can be useful in power supplies of portable devices that are gradually being miniaturized.
摘要翻译：提供了一种用于包括其的便携式设备的开关电路和小尺寸高效率直流 - 直流（DC-DC）转换器。使用具有动态阈值电压的动态阈值互补金属氧化物半导体（DT-CMOS）晶体管作为开关器件，开关电路在正常模式下维持低阈值电压，从而改善电流驱动能力，同时降低导通损耗，并保持高阈值电压处于待机模式以最小化功耗。当在DC-DC转换器中采用开关电路时，可以通过降低正常模式下的导通损耗来提高功率转换效率，并且在待机模式下功耗可以最小化。因此，DC-DC转换器可以使便携式设备的电池的使用时间最大化，并且可以用于逐渐小型化的便携式设备的电源。

23. 发明授权

US08217728B2 LC voltage-controlled oscillator 失效
标题翻译： LC压控振荡器
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。

24. 发明申请

US20110018646A1 LC VOLTAGE-CONTROLLED OSCILLATOR 审中-公开
标题翻译： LC电压控制振荡器
公开(公告)号：US20110018646A1
公开(公告)日：2011-01-27
申请号：US12840478
申请日：2010-07-21
申请人： Hui Dong LEE , Seok Ju Yun , Kwi Dong Kim , Jong Kee Kwon
发明人： Hui Dong LEE , Seok Ju Yun , Kwi Dong Kim , Jong Kee Kwon
IPC分类号： H03B5/12
CPC分类号： H03B5/1228 , H03B5/1215 , H03B5/1218 , H03B5/1221 , H03B5/1243
摘要： An LC voltage-controlled oscillator (VCO) is provided. According to the LC voltage-controlled oscillator (VCO), the amplitude of an oscillation signal is improved by increasing the impedance value of an amplifier circuit seen from an output node in an LC voltage-controlled oscillator (VCO), and phase noise is also improved.
摘要翻译：提供了一个LC压控振荡器（VCO）。根据LC压控振荡器（VCO），通过增加从LC压控振荡器（VCO）中的输出节点看到的放大器电路的阻抗值，振荡信号的振幅得到改善，相位噪声也是改进。

25. 发明申请

US20110018644A1 OSCILLATOR 有权
标题翻译：振荡器
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。

26. 发明授权

US08274317B2 Phase-locked loop circuit comprising voltage-controlled oscillator having variable gain 失效
标题翻译：锁相环电路包括具有可变增益的压控振荡器
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。

27. 发明授权

US08040156B2 Lock detection circuit and lock detecting method 有权
标题翻译：锁定检测电路及锁定检测方法
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。

28. 发明申请

US20110148485A1 PHASE-LOCKED LOOP CIRCUIT COMPRISING VOLTAGE-CONTROLLED OSCILLATOR HAVING VARIABLE GAIN 失效
标题翻译：包含具有可变增益的电压控制振荡器的相位锁定环路
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。

29. 发明授权

US08111574B2 Circuit and method for controlling self-refresh cycle 有权
标题翻译：控制自刷新周期的电路和方法
公开(公告)号：US08111574B2
公开(公告)日：2012-02-07
申请号：US12535069
申请日：2009-08-04
申请人： Kwi Dong Kim
发明人： Kwi Dong Kim
IPC分类号： G11C7/00
CPC分类号： G11C11/406 , G11C7/04 , G11C11/40615 , G11C11/40626 , G11C2211/4061 , G11C2211/4068
摘要： The present invention relates to a circuit and a method for controlling a self-refresh cycle of a dynamic random access memory or DRAM. A cell voltage is directly detected so that a self-refresh cycle can be variably controlled. Detectors each detecting whether or not a voltage charged into a capacitor of a detection cell drops to or below a reference voltage and outputs a detection signal. A pulse generator generates a self-refresh pulse while being linked with an enabled detection signal of the plurality of detectors. A self-refresh cycle can be variably controlled and set to be suitable for the charging capacity of a cell. The detection cell is adapted to the change of the charging capacity of the cell in accordance with a change in temperature.
摘要翻译：本发明涉及用于控制动态随机存取存储器或DRAM的自刷新周期的电路和方法。直接检测电池电压，使得可以可变地控制自刷新周期。检测器各自检测充电到检测单元的电容器中的电压是否下降到或低于参考电压，并输出检测信号。脉冲发生器在与多个检测器的使能检测信号链接的同时产生自刷新脉冲。自刷新周期可以被可变地控制并且设置成适合于电池的充电容量。检测单元根据温度的变化适应电池的充电容量的变化。

30. 发明授权

US07511581B2 Wide-band multimode frequency synthesizer and variable frequency divider 有权
标题翻译：宽带多模频率合成器和可变分频器
公开(公告)号：US07511581B2
公开(公告)日：2009-03-31
申请号：US11634004
申请日：2006-12-05
申请人： Ja Yol Lee , Kwi Dong Kim , Chong Ki Kwon , Jong Dae Kim , Sang Heung Lee
发明人： Ja Yol Lee , Kwi Dong Kim , Chong Ki Kwon , Jong Dae Kim , Sang Heung Lee
IPC分类号： H03L7/00
CPC分类号： H03K23/667 , H03L7/0898 , H03L7/093 , H03L7/099 , H03L7/193
摘要： A wide-band multimode frequency synthesizer using a Phase Locked Loop (PLL) is provided. The multiband frequency synthesizer includes a multimode prescaler, a phase detector/a charge pump, a swallow type frequency divider, and a switching bank LC tuning voltage-controlled oscillator having wide-band and low phase noise characteristics. The multimode prescaler operates in five modes and divides a signal up to 12 GHz. The wide-band frequency synthesizer can be used in various fields such as WLAN/HYPERLAN/DSRC/UWB systems that operate in the frequency range from 2 GHz to 9 GHz. The wide-band multimode frequency synthesizer includes a frequency/phase detector for comparing a frequency and phase of a reference high-frequency signal with a frequency and phase of a feedback high-frequency signal; a charge pump for producing an output current corresponding to the result of the comparison performed by the frequency/phase detector; a loop filter for producing an output voltage corresponding to an accumulated value of the output current of the charge pump; a voltage-controlled oscillator for generating an oscillation signal having a frequency corresponding to the output voltage of the loop filter; and a variable frequency divider for dividing an output signal of the voltage-controlled oscillator by a designated integer value, and outputting the result as a feedback signal, wherein at lease two of an amount of unit pumping charges of the charge pump, an RLC value of the loop filter, an RLC value of the voltage-controlled oscillator, and a divisor value of the variable frequency divider are controlled according to a band.
摘要翻译：提供了使用锁相环（PLL）的宽带多模频率合成器。多频率频率合成器包括多模预分频器，相位检测器/电荷泵，燕子式分频器和具有宽带和低相位噪声特性的开关组LC调谐压控振荡器。多模预分频器以五种模式工作，并将信号分为12 GHz。宽带频率合成器可用于各种领域，例如在2 GHz至9 GHz频率范围内工作的WLAN / HYPERLAN / DSRC / UWB系统。宽带多模频率合成器包括用于将参考高频信号的频率和相位与反馈高频信号的频率和相位进行比较的频率/相位检测器; 用于产生与由频率/相位检测器执行的比较结果相对应的输出电流的电荷泵; 环路滤波器，用于产生与电荷泵的输出电流的累积值相对应的输出电压; 用于产生具有与环路滤波器的输出电压对应的频率的振荡信号的压控振荡器; 以及可变分频器，用于将压控振荡器的输出信号除以指定的整数值，并输出该结果作为反馈信号，其中至少两个电荷泵的单位泵送电荷，RLC值根据频带控制环路滤波器的电压控制振荡器的RLC值和可变分频器的除数值。

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