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    SYSTEMS AND METHODS FOR LOW-BATTERY OPERATION CONTROL IN PORTABLE COMMUNICATION DEVICES
    172.
    发明申请
    SYSTEMS AND METHODS FOR LOW-BATTERY OPERATION CONTROL IN PORTABLE COMMUNICATION DEVICES 审中-公开
    便携式通信设备中低电压操作控制的系统和方法

    公开(公告)号：US20120194150A1

    公开(公告)日：2012-08-02

    申请号：US13018788

    申请日：2011-02-01

    Applicant: Jaejoon Chang ,  Ki Seok Yang ,  Jeonghu Han ,  Woonyun Kim ,  Chang-Ho Lee

    Inventor： Jaejoon Chang ,  Ki Seok Yang ,  Jeonghu Han ,  Woonyun Kim ,  Chang-Ho Lee

    IPC: G05F1/575

    CPC classification number: G06F1/26 ,  H04W52/0261

    Abstract: Systems and methods may include a low-dropout (LDO) voltage regulator for portable communication devices. The systems and methods may include a comparator having first and second inputs and generating a control voltage, the first input receiving a battery voltage from a battery source, the second input receiving a fixed voltage independent from the battery voltage, and a power management circuit that receives the control voltage and provides a regulated voltage based upon the control voltage, wherein when the received battery voltage is above the fixed voltage, the control voltage is provided at a high constant voltage, thereby resulting in the regulated voltage being at a first voltage, and wherein when the battery voltage is below the fixed voltage, the control voltage is provided at a low constant voltage, thereby resulting in the regulated voltage being at a second voltage less than the first voltage.

    Abstract translation: 系统和方法可以包括用于便携式通信设备的低压差（LDO）电压调节器。 该系统和方法可以包括具有第一和第二输入并产生控制电压的比较器，第一输入从电池源接收电池电压，第二输入接收独立于电池电压的固定电压，以及功率管理电路， 接收控制电压并根据控制电压提供调节电压，其中当接收的电池电压高于固定电压时，以高的恒定电压提供控制电压，由此导致调节电压处于第一电压， 并且其中当所述电池电压低于所述固定电压时，所述控制电压以低的恒定电压被提供，从而导致所述调节电压处于小于所述第一电压的第二电压。

    Linearization systems and methods for variable attenuators
    173.
    发明授权
    Linearization systems and methods for variable attenuators 有权
    可变衰减器的线性化系统和方法

    公开(公告)号：US08179205B2

    公开(公告)日：2012-05-15

    申请号：US12784723

    申请日：2010-05-21

    Applicant: Yanyu Huang ,  Wangmyong Woo ,  Chang-Ho Lee ,  Joy Laskar

    Inventor： Yanyu Huang ,  Wangmyong Woo ,  Chang-Ho Lee ,  Joy Laskar

    IPC: H01P1/22

    CPC classification number: H01P1/22 ,  H03G1/007 ,  H03H11/245

    Abstract: Systems and methods for provided for linearization systems and methods for variable attenuators. The variable attenuators can include series transistors along a main signal path from the input to output, as well as shunt transistors. A bootstrapping body bias circuit can be used with one or of the series transistors to allow the body of a connected transistor to swing responsive to a received RF input signal. As the RF signal increases and affects the gate-to-source voltage difference of a transistor, a bootstrapping body bias circuit can adaptively adjust the threshold voltage of the connected transistor and compensate the channel resistance variation resulting from gate-to-source voltage swing. The bootstrapping body bias circuit can be implemented using passive elements, active elements, or a combination thereof.

    Abstract translation: 为可变衰减器的线性化系统和方法提供的系统和方法。 可变衰减器可以包括沿着从输入到输出的主信号路径的串联晶体管，以及分流晶体管。 自举体偏置电路可以与一个或串联晶体管一起使用，以允许连接的晶体管的主体响应于接收到的RF输入信号而摆动。 随着RF信号增加并影响晶体管的栅极 - 源极电压差，自举体偏置电路可以自适应地调节连接的晶体管的阈值电压，并补偿由栅极至源极电压摆幅引起的沟道电阻变化。 自举体偏置电路可以使用无源元件，有源元件或其组合来实现。

    Systems and methods for self-mixing adaptive bias circuit for power amplifier
    176.
    发明授权
    Systems and methods for self-mixing adaptive bias circuit for power amplifier 有权
    用于功率放大器的自混合自适应偏置电路的系统和方法

    公开(公告)号：US08106712B2

    公开(公告)日：2012-01-31

    申请号：US12623136

    申请日：2009-11-20

    Applicant: Dong Ho Lee ,  Kyu Hwan An ,  Chang-Ho Lee ,  Joy Laskar

    Inventor： Dong Ho Lee ,  Kyu Hwan An ,  Chang-Ho Lee ,  Joy Laskar

    IPC: H03F3/04

    CPC classification number: H03F1/3205 ,  H03F1/0261 ,  H03F1/223 ,  H03F3/45475 ,  H03F2200/18

    Abstract: Systems and methods for providing a self-mixing adaptive bias circuit that may include a mixer, low-pass filter or a phase shifter, and a bias feeding block. The self-mixing adaptive bias circuit may generate an adaptive bias signal depending on input signal power level. As the input power level goes up, the adaptive bias circuit increases the bias voltage or bias current such that the amplifier will save current consumption at low power operation levels and obtain better linearity at high power operation levels compared to conventional biasing techniques. Moreover, the adaptive bias output signal can be used to cancel the third-order intermodulation terms (IM3) to further enhance the linearity as a secondary effect.

    Abstract translation: 用于提供可以包括混频器，低通滤波器或移相器的自混合自适应偏置电路的系统和方法以及偏置馈电块。 自混合自适应偏置电路可以根据输入信号功率电平产生自适应偏置信号。 随着输入功率电平上升，自适应偏置电路增加了偏置电压或偏置电流，使得放大器可以在低功率运行电平下节省电流消耗，并且与常规偏置技术相比，在高功率运行电平下获得更好的线性度。 此外，自适应偏置输出信号可以用于消除三阶互调项（IM3），以进一步增强作为次级效应的线性。

    LINEARIZATION SYSTEMS AND METHODS FOR VARIABLE ATTENUATORS
    177.
    发明申请
    LINEARIZATION SYSTEMS AND METHODS FOR VARIABLE ATTENUATORS 有权
    线性化系统和变量衰减器的方法

    公开(公告)号：US20110285481A1

    公开(公告)日：2011-11-24

    申请号：US12784723

    申请日：2010-05-21

    Applicant: Yanyu Huang ,  Wangmyong Woo ,  Chang-Ho Lee ,  Joy Laskar

    Inventor： Yanyu Huang ,  Wangmyong Woo ,  Chang-Ho Lee ,  Joy Laskar

    IPC: H01P1/22

    CPC classification number: H01P1/22 ,  H03G1/007 ,  H03H11/245

    Abstract: Systems and methods for provided for linearization systems and methods for variable attenuators. The variable attenuators can include series transistors along a main signal path from the input to output, as well as shunt transistors. A bootstrapping body bias circuit can be used with one or of the series transistors to allow the body of a connected transistor to swing responsive to a received RF input signal. As the RF signal increases and affects the gate-to-source voltage difference of a transistor, a bootstrapping body bias circuit can adaptively adjust the threshold voltage of the connected transistor and compensate the channel resistance variation resulting from gate-to-source voltage swing. The bootstrapping body bias circuit can be implemented using passive elements, active elements, or a combination thereof.

    Abstract translation: 为可变衰减器的线性化系统和方法提供的系统和方法。 可变衰减器可以包括沿着从输入到输出的主信号路径的串联晶体管，以及分流晶体管。 自举体偏置电路可以与一个或串联晶体管一起使用，以允许连接的晶体管的主体响应于接收到的RF输入信号而摆动。 随着RF信号增加并影响晶体管的栅极 - 源极电压差，自举体偏置电路可以自适应地调节连接的晶体管的阈值电压，并补偿由栅极至源极电压摆幅引起的沟道电阻变化。 自举体偏置电路可以使用无源元件，有源元件或其组合来实现。

    SYSTEMS AND METHODS FOR COMPLEMENTARY METAL-OXIDE-SEMICONDUCTOR (CMOS) DIFFERENTIAL ANTENNA SWITCHES USING MULTI-SECTION IMPEDANCE TRANSFORMATIONS
    178.
    发明申请
    SYSTEMS AND METHODS FOR COMPLEMENTARY METAL-OXIDE-SEMICONDUCTOR (CMOS) DIFFERENTIAL ANTENNA SWITCHES USING MULTI-SECTION IMPEDANCE TRANSFORMATIONS 有权
    使用多段阻抗变换的补充金属氧化物半导体（CMOS）差分天线开关的系统和方法

    公开(公告)号：US20110273355A1

    公开(公告)日：2011-11-10

    申请号：US12773222

    申请日：2010-05-04

    Applicant: Minsik Ahn ,  Chang-Ho Lee

    Inventor： Minsik Ahn ,  Chang-Ho Lee

    IPC: H01Q1/50 ,  H01Q3/24

    CPC classification number: H01Q1/50 ,  H01Q3/24

    Abstract: Example embodiments of the invention are directed to CMOS differential antenna switches with multi-section impedance transformation. The differential architecture can provide relief from large voltage swings of the power amplifiers by distributing the voltage stress over the receiver switch with two of the identical or substantially similar single-ended switches. In order to reduce the voltage stress further, multi-section impedance transformations can be used. Degraded insertion loss due to the impedance transformation technique can be compensated by selecting an optimal impedance for the antenna switch operation. Accordingly, the use of the multi-section impedance transformations with the differential antenna switch architecture enables high power handling capability for the antenna switch with acceptable efficiency for the transmitter module.

    Abstract translation: 本发明的示例性实施例涉及具有多段阻抗变换的CMOS差分天线开关。 差分架构可以通过使用两个相同或基本相似的单端开关在接收器开关上分配电压来提供功率放大器的大电压摆幅。 为了进一步降低电压应力，可以使用多段阻抗变换。 可以通过选择天线开关操作的最佳阻抗来补偿由阻抗变换技术引起的降级插入损耗。 因此，利用具有差分天线开关结构的多段阻抗变换能够实现对发射机模块具有可接受效率的天线开关的高功率处理能力。

    Organometallic complex, method of preparing the same and organic light emitting device comprising the same
    179.
    发明授权
    Organometallic complex, method of preparing the same and organic light emitting device comprising the same 有权
    有机金属络合物，其制备方法和包含其的有机发光器件

    公开(公告)号：US08053093B2

    公开(公告)日：2011-11-08

    申请号：US12155940

    申请日：2008-06-11

    Applicant: Jung-Han Shin ,  Seung-Gak Yang ,  Hee-Yeon Kim ,  Chang-Ho Lee ,  Hee-Joo Ko

    Inventor： Jung-Han Shin ,  Seung-Gak Yang ,  Hee-Yeon Kim ,  Chang-Ho Lee ,  Hee-Joo Ko

    IPC: H01J1/63

    CPC classification number: C07D221/10 ,  C07F1/08 ,  C07F3/08 ,  C07F5/069 ,  C09K11/06 ,  C09K2211/1029 ,  C09K2211/188 ,  H05B33/14

    Abstract: An organometallic complex for an organic light emitting device represented by formula 1, a method of preparing the same and an organic light emitting device including the same: where R1 through R16 are a hydrogen atom, a cyano group, a hydroxyl group, a nitro group, a halogen atom, a C1-C20 alkyl group, a C1-C20 alkoxy group, a C6-C20 aryl group, a C7-C20 arylalkyl group, a C2-C20 alkylalkoxy group, a C7-C20 arylalkoxy group, a C6-C20 arylamino group, a C1-C20 alkylamino group, a C6-C20 heteroarylamino group, and a C2-C20 hetero-ring group; and M is a bivalent metal such as Be, Mg, Zn, Ca, Cr, Fe, Co, Ni and Cu. The compound represented by Formula 1 can be effectively used in an electron transport layer or an electron injection layer. An organic light emitting device including the compound represented by Formula 1 can thus have long lifetime.

    Abstract translation: 由式1表示的有机发光器件的有机金属络合物，其制备方法和包括其的有机发光器件：其中R 1至R 16为氢原子，氰基，羟基，硝基 卤素原子，C1-C20烷基，C1-C20烷氧基，C6-C20芳基，C7-C20芳基烷基，C2-C20烷基烷氧基，C7-C20芳基烷氧基，C6- C20芳基氨基，C1-C20烷基氨基，C6-C20杂芳基氨基和C2-C20杂环基团; M是Be，Mg，Zn，Ca，Cr，Fe，Co，Ni和Cu等二价金属。 由式1表示的化合物可以有效地用于电子传输层或电子注入层。 因此，具有式1化合物的有机发光元件的寿命长。

    Overlapping compact multiple transformers
    180.
    发明授权
    Overlapping compact multiple transformers 有权
    重叠紧凑型多变压器

    公开(公告)号：US08044759B2

    公开(公告)日：2011-10-25

    申请号：US12902940

    申请日：2010-10-12

    Applicant: Ki Seok Yang ,  Jeonghu Han ,  Jaejoon Chang ,  Woonyun Kim ,  Chang-Ho Lee

    Inventor： Ki Seok Yang ,  Jeonghu Han ,  Jaejoon Chang ,  Woonyun Kim ,  Chang-Ho Lee

    IPC: H01F5/00

    CPC classification number: H01F27/2804 ,  H01F19/04 ,  H01L2224/48091 ,  H01L2224/49175 ,  H01L2924/00014

    Abstract: Systems and methods are provided for overlapping compact multiple transformers. The systems and methods may include a first transformer section that includes a first primary winding section and a first secondary winding, where the first primary winding section is inductively coupled to the first secondary winding, where the first transformer section is associated with a first rotational current flow direction in the first primary winding section; and a second transformer section that includes a second primary winding section and a second secondary winding, where the second primary winding section is inductively coupled to the second secondary winding, wherein the second transformer section is associated with a second rotational current flow direction in the second primary winding section, where a first portion of the first primary winding section is adjacent to a second portion of the second primary winding section, where the adjacent first and second portions include a substantially same first linear current flow direction.

    Abstract translation: 提供了用于重叠紧凑型多变压器的系统和方法。 系统和方法可以包括第一变压器部分，其包括第一初级绕组部分和第一次级绕组，其中第一初级绕组部分感应耦合到第一次级绕组，其中第一变压器部分与第一转子电流相关联 第一初级绕组段中的流动方向; 以及第二变压器部分，其包括第二初级绕组部分和第二次级绕组，其中所述第二初级绕组部分感应耦合到所述第二次级绕组，其中所述第二变压器部分与所述第二转子部分中的第二转动电流流动方向相关联， 初级绕组部分，其中第一初级绕组部分的第一部分与第二初级绕组部分的第二部分相邻，其中相邻的第一和第二部分包括基本相同的第一线性电流流动方向。

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