公开(公告)号：US20110309815A1

公开(公告)日：2011-12-22

申请号：US13161526

申请日：2011-06-16

Applicant: Jin-Hyuck Yu ,  Dong-Jin Keum

Inventor： Jin-Hyuck Yu ,  Dong-Jin Keum

IPC: G05F3/02

CPC classification number: H02M3/156 ,  H02M2001/0009 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A power converter includes a power converting unit and a driving circuit. The power converting unit generates a DC output voltage based on a pull up driving signal, a pull down driving signal, and a DC input voltage. The driving circuit compensates for an inductor peak current, and performs in a pulse-frequency-modulation (PFM) mode and a pulse-width-modulation (PWM) mode to generate the pull-up driving signal and the pull-down driving signal based on the DC output voltage and the compensated inductor peak current. The power converter performs a mode transition between the PFM and PWM modes at a uniform load current, even when a magnitude of the DC output voltage varies.

Abstract translation: 功率转换器包括功率转换单元和驱动电路。 功率转换单元基于上拉驱动信号，下拉驱动信号和直流输入电压产生DC输出电压。 驱动电路补偿电感峰值电流，并以脉冲频率调制（PFM）模式和脉冲宽度调制（PWM）模式执行，以产生上拉驱动信号和下拉驱动信号 直流输出电压和补偿电感峰值电流。 功率转换器在均匀负载电流下执行PFM和PWM模式之间的模式转换，即使直流输出电压的幅度变化也是如此。

公开(公告)号：US08624573B2

公开(公告)日：2014-01-07

申请号：US13116296

申请日：2011-05-26

Applicant: Jin-Hyuck Yu ,  Dong-Jin Keum ,  Hyoung-Seok Oh

Inventor： Jin-Hyuck Yu ,  Dong-Jin Keum ,  Hyoung-Seok Oh

IPC: G05F1/00

CPC classification number: H02M3/158 ,  H02M2001/0009

Abstract: A power converter includes a zero-current detector having an adjustable offset voltage. The power converter includes a power converting unit and a switch driving circuit. The power converting unit generates a DC output voltage based on a pull-up driving signal, a pull-down driving signal and a DC input voltage. The switch driving circuit generates a first detection voltage signal based on the DC output voltage. The switch driving circuit includes a zero-current detector configured to adjust an offset voltage based on the first detection voltage signal and generate a zero-current detecting signal based on the offset voltage. The offset voltage and the zero-current detecting signal are associated with a current in the power converting unit. The switch driving circuit also includes a pulse-frequency modulating circuit configured to perform a pulse-frequency modulation (PFM) to generate the pull-up driving signal and the pull-down driving signal based on the zero-current detecting signal.

Abstract translation: 功率转换器包括具有可调偏移电压的零电流检测器。 电力转换器包括电力转换单元和开关驱动电路。 功率转换单元基于上拉驱动信号，下拉驱动信号和DC输入电压产生DC输出电压。 开关驱动电路基于直流输出电压产生第一检测电压信号。 开关驱动电路包括：零电流检测器，被配置为基于第一检测电压信号调整偏移电压，并基于偏移电压产生零电流检测信号。 偏移电压和零电流检测信号与功率转换单元中的电流相关联。 开关驱动电路还包括：脉冲频率调制电路，被配置为基于零电流检测信号执行脉冲频率调制（PFM）以产生上拉驱动信号和下拉驱动信号。

公开(公告)号：US20110291632A1

公开(公告)日：2011-12-01

申请号：US13116296

申请日：2011-05-26

Applicant: Jin-Hyuck Yu ,  Dong-Jin Keum ,  Hyoung-Seok Oh

Inventor： Jin-Hyuck Yu ,  Dong-Jin Keum ,  Hyoung-Seok Oh

IPC: G05F1/618

CPC classification number: H02M3/158 ,  H02M2001/0009

Abstract: A power converter includes a zero-current detector having an adjustable offset voltage. The power converter includes a power converting unit and a switch driving circuit. The power converting unit generates a DC output voltage based on a pull-up driving signal, a pull-down driving signal and a DC input voltage. The switch driving circuit generates a first detection voltage signal based on the DC output voltage. The switch driving circuit includes a zero-current detector configured to adjust an offset voltage based on the first detection voltage signal and generate a zero-current detecting signal based on the offset voltage. The offset voltage and the zero-current detecting signal are associated with a current in the power converting unit. The switch driving circuit also includes a pulse-frequency modulating circuit configured to perform a pulse-frequency modulation (PFM) to generate the pull-up driving signal and the pull-down driving signal based on the zero-current detecting signal

Abstract translation: 功率转换器包括具有可调偏移电压的零电流检测器。 电力转换器包括电力转换单元和开关驱动电路。 功率转换单元基于上拉驱动信号，下拉驱动信号和DC输入电压产生DC输出电压。 开关驱动电路基于直流输出电压产生第一检测电压信号。 开关驱动电路包括：零电流检测器，被配置为基于第一检测电压信号调整偏移电压，并基于偏移电压产生零电流检测信号。 偏移电压和零电流检测信号与功率转换单元中的电流相关联。 开关驱动电路还包括：脉冲频率调制电路，被配置为基于零电流检测信号执行脉冲频率调制（PFM）以产生上拉驱动信号和下拉驱动信号

公开(公告)号：US07626470B2

公开(公告)日：2009-12-01

申请号：US11736732

申请日：2007-04-18

Applicant: Jin-Hyuck Yu

Inventor： Jin-Hyuck Yu

IPC: H03K3/282

CPC classification number: H03B5/1228 ,  H03B5/1215 ,  H03B5/1221 ,  H03B5/1243 ,  H03B5/1293

Abstract: A voltage-controlled oscillator (VCO) for a multi-band receiver, and a radio-frequency (RF) communication apparatus having the same. The VCO includes at least two fine tune branches, that is, a main fine tune branch and an auxiliary fine tune branch. The main fine tune branch includes at least one variable capacitor whose capacitance varies according to a tuning voltage. The auxiliary fine tune branch includes at least one varactor that operates either as a variable capacitor whose capacitance varies according to the tuning voltage or a fixed capacitor regardless of the tuning voltage, based on an operating frequency band. Accordingly, it is possible to prevent phase noise from increasing by varying the gain of the VCO according to the frequency band of an oscillation signal from the VCO.

Abstract translation: 一种用于多频带接收机的压控振荡器（VCO），以及具有该压控振荡器的射频（RF）通信装置。 VCO包括至少两个微调分支，即主微调分支和辅助微调分支。 主微调支路包括至少一个可变电容器，其电容根据调谐电压而变化。 辅助微调分支包括至少一个变容二极管，其基于工作频带，作为可变电容器，其可变电容器根据调谐电压而变化或固定电容器，而与调谐电压无关。 因此，可以根据来自VCO的振荡信号的频带改变VCO的增益来防止相位噪声增加。

公开(公告)号：US20080036550A1

公开(公告)日：2008-02-14

申请号：US11736732

申请日：2007-04-18

Applicant: Jin-Hyuck Yu

Inventor： Jin-Hyuck Yu

IPC: H03B5/12

CPC classification number: H03B5/1228 ,  H03B5/1215 ,  H03B5/1221 ,  H03B5/1243 ,  H03B5/1293

Abstract: A voltage-controlled oscillator (VCO) for a multi-band receiver, and a radio-frequency (RF) communication apparatus having the same. The VCO includes at least two fine tune branches, that is, a main fine tune branch and an auxiliary fine tune branch. The main fine tune branch includes at least one variable capacitor whose capacitance varies according to a tuning voltage. The auxiliary fine tune branch includes at least one varactor that operates either as a variable capacitor whose capacitance varies according to the tuning voltage or a fixed capacitor regardless of the tuning voltage, based on an operating frequency band. Accordingly, it is possible to prevent phase noise from increasing by varying the gain of the VCO according to the frequency band of an oscillation signal from the VCO.

Abstract translation: 一种用于多频带接收机的压控振荡器（VCO），以及具有该压控振荡器的射频（RF）通信装置。 VCO包括至少两个微调分支，即主微调分支和辅助微调分支。 主微调支路包括至少一个可变电容器，其电容根据调谐电压而变化。 辅助微调分支包括至少一个变容二极管，其基于工作频带，作为可变电容器，其可变电容器根据调谐电压而变化或固定电容器，而与调谐电压无关。 因此，可以根据来自VCO的振荡信号的频带改变VCO的增益来防止相位噪声增加。

公开(公告)号：US08373500B2

公开(公告)日：2013-02-12

申请号：US12684459

申请日：2010-01-08

Applicant: Jin Hyuck Yu

Inventor： Jin Hyuck Yu

IPC: G05F1/10

CPC classification number: H04N5/3698 ,  H04N5/3577

Abstract: A voltage biasing circuit includes a metal-oxide-semiconductor (MOS) transistor, a voltage control circuit controlling a voltage between a gate and a source of the MOS transistor to operate the MOS transistor in a sub-threshold range, and a capacitor connected to the MOS transistor. The voltage biasing circuit may further include a voltage buffer connected between the voltage control circuit and the MOS transistor.

Abstract translation: 电压偏置电路包括金属氧化物半导体（MOS）晶体管，电压控制电路，控制MOS晶体管的栅极和源极之间的电压，以将MOS晶体管工作在亚阈值范围内;以及电容器，连接到 MOS晶体管。 电压偏置电路还可以包括连接在电压控制电路和MOS晶体管之间的电压缓冲器。

公开(公告)号：US20100177232A1

公开(公告)日：2010-07-15

申请号：US12684459

申请日：2010-01-08

Applicant: Jin Hyuck YU

Inventor： Jin Hyuck YU

IPC: H04N5/335 ,  H03K3/01

CPC classification number: H04N5/3698 ,  H04N5/3577

Abstract: A voltage biasing circuit includes a metal-oxide-semiconductor (MOS) transistor, a voltage control circuit controlling a voltage between a gate and a source of the MOS transistor to operate the MOS transistor in a sub-threshold range, and a capacitor connected to the MOS transistor. The voltage biasing circuit may further include a voltage buffer connected between the voltage control circuit and the MOS transistor.

Abstract translation: 电压偏置电路包括金属氧化物半导体（MOS）晶体管，电压控制电路，控制MOS晶体管的栅极和源极之间的电压，以将MOS晶体管工作在亚阈值范围内;以及电容器，连接到 MOS晶体管。 电压偏置电路还可以包括连接在电压控制电路和MOS晶体管之间的电压缓冲器。

公开(公告)号：US07449970B2

公开(公告)日：2008-11-11

申请号：US11416408

申请日：2006-05-02

Applicant: Jin-Hyuck Yu ,  Je-Kwang Cho

Inventor： Jin-Hyuck Yu ,  Je-Kwang Cho

IPC: H03B5/18

CPC classification number: H03J7/10 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2201/0208 ,  H03J2200/36

Abstract: A frequency fine tuning circuit for use in a voltage-controlled oscillator is provided. The frequency tuning circuit includes a first varactor, a second varactor and a center bias unit. The second varactor is coupled to the first varactor at a first node. The center bias unit maintains a node voltage of the first node at a constant bias voltage level.

Abstract translation: 提供一种用于压控振荡器的频率微调电路。 频率调谐电路包括第一变容二极管，第二变容二极管和中心偏置单元。 第二变容二极管在第一节点耦合到第一变容二极管。 中心偏置单元将第一节点的节点电压维持在恒定的偏置电压电平。

公开(公告)号：US20070046386A1

公开(公告)日：2007-03-01

申请号：US11438861

申请日：2006-05-23

Applicant: Jin-Hyuck Yu

Inventor： Jin-Hyuck Yu

IPC: H03B5/12

CPC classification number: H03B5/1228 ,  H03B5/1215 ,  H03B5/124

Abstract: A semiconductor circuit for reducing flicker noise includes a negative-conductance generator and a body bias voltage supplying circuit. The negative-conductance generator includes a pair of cross-coupled field effect transistors in order to generate negative-conductance, wherein each field effect transistor includes a body. In order to remove flicker noise generated by the pair of the field effect transistors, the body bias voltage supplying circuit supplies a body bias voltage to the body of each of the pair of the field effect transistors so that a forward bias voltage is supplied to the body and source of each of the pair of the field effect transistors. The field effect transistors are preferably NMOS transistors or CMOS transistors. The semiconductor circuit is used in a voltage controlled oscillator (VCO) or a phase-locked loop (PLL).

Abstract translation: 用于减少闪烁噪声的半导体电路包括负电导发生器和体偏置电压供应电路。 负电导发生器包括一对交叉耦合场效应晶体管，以产生负电导，其中每个场效应晶体管包括一个主体。 为了消除由一对场效应晶体管产生的闪烁噪声，体偏置电压供给电路将一个体偏置电压提供给一对场效应晶体管中的每一个的主体，使得正向偏置电压被提供给 每一对场效应晶体管的体和源。 场效应晶体管优选地是NMOS晶体管或CMOS晶体管。 半导体电路用于压控振荡器（VCO）或锁相环（PLL）。

公开(公告)号：US20070040625A1

公开(公告)日：2007-02-22

申请号：US11416408

申请日：2006-05-02

Applicant: Jin-Hyuck Yu ,  Je-Kwang Cho

Inventor： Jin-Hyuck Yu ,  Je-Kwang Cho

IPC: H03B5/12

CPC classification number: H03J7/10 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2201/0208 ,  H03J2200/36

Abstract: A frequency fine tuning circuit for use in a voltage-controlled oscillator is provided. The frequency tuning circuit includes a first varactor, a second varactor and a center bias unit. The second varactor is coupled to the first varactor at a first node. The center bias unit maintains a node voltage of the first node at a constant bias voltage level.

Abstract translation: 提供一种用于压控振荡器的频率微调电路。 频率调谐电路包括第一变容二极管，第二变容二极管和中心偏置单元。 第二变容二极管在第一节点耦合到第一变容二极管。 中心偏置单元将第一节点的节点电压维持在恒定的偏置电压电平。