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    • 1. 发明公开
    • 전류 미러를 이용한 광대역 저잡음 증폭기
    • 宽带低噪声放大器使用电流镜
    • KR1020080048591A
    • 2008-06-03
    • KR1020060118742
    • 2006-11-29
    • 엘지전자 주식회사한국과학기술원
    • 송성식이귀로임동구김홍득
    • H03F1/26
    • H03F1/26H03F1/223H03F1/56H03F3/193H03F2200/294
    • A wide-band low-noise amplifier using a current mirror is provided to perform a positive current feedback operation by using the current mirror. First and second common gate amplifiers(500,510) convert input signals of first and second input terminals to current. First and second common source amplifiers(520,530) amplify output signals of the first and second common gate amplifiers and output the amplified output signals to first and second output terminals. First and second current mirrors(540,550) supply the current to the first and second common source amplifiers according to the current applied to the first and second common gate amplifiers and feeds back the forward current to the second and first input terminals.
    • 提供使用电流镜的宽带低噪声放大器,以通过使用电流镜来执行正电流反馈操作。 第一和第二公共门放大器(500,510)将第一和第二输入端的输入信号转换为电流。 第一和第二公共源极放大器(520,530)放大第一和第二公共栅极放大器的输出信号,并将放大的输出信号输出到第一和第二输出端。 第一和第二电流镜(540,550)根据施加到第一和第二公共栅极放大器的电流将电流提供给第一和第二公共源放大器,并将正向电流反馈到第二和第一输入端。
    • 2. 发明授权
    • 연속 펄스를 이용한 논데시메이션 필터
    • 使用脉冲串的非线性滤波器
    • KR101090722B1
    • 2011-12-08
    • KR1020100017587
    • 2010-02-26
    • 한국과학기술원
    • 이귀로최재영임동구권구덕
    • H03H17/00
    • 디지털논데시메이션필터에관한것으로서, 연속펄스를이용하여필터탭이구성된논데시메이션필터에관한것이다. 실시예에따른필터회로는하나이상의필터유닛을포함하고, 필터유닛의각각은캐패시터를포함하고, 상기필터유닛은디지털전류신호를입력받아필터계수에기초하여하나의캐패시터에상기전류신호를충전시키고, 상기하나의캐패시터에는다수의샘플각각에대응하는전하가누적하여충전되며, 상기필터계수는상기필터유닛에따라한 샘플간격씩쉬프트되어상기필터유닛에제공되며,, 출력펄스신호에동기화하여충전된캐패시터의전압을출력한다. 실시예에따른필터회로에서, 필터유닛의각각은, 캐패시터와디지털전류신호의입력사이에위치한제 1 스위치; 캐패시터와출력사이에위치한제 2 스위치를더 포함하고, 제 1 스위치는필터계수에기초하여스위칭되고, 제 2 스위치는출력펄스신호에기초하여스위칭되고, 캐패시터의일 단은제 1 스위치및 제 2 스위치에연결이되고, 캐패시터의다른단은그라운드에연결이되는것이바람직하다.
    • 3. 发明公开
    • 연속 펄스를 이용한 논데시메이션 필터
    • 使用连续脉冲的非抽取滤波器
    • KR1020110098128A
    • 2011-09-01
    • KR1020100017587
    • 2010-02-26
    • 한국과학기술원
    • 이귀로최재영임동구권구덕
    • H03H17/00
    • H03H17/00H03H11/0427H03H17/0664H03H21/0012
    • 디지털 논데시메이션 필터에 관한 것으로서, 연속 펄스를 이용하여 필터 탭이 구성된 논데시메이션 필터에 관한 것이다.
      실시예에 따른 필터 회로는 하나 이상의 필터 유닛을 포함하고, 필터 유닛의 각각은 캐패시터를 포함하고, 필터 유닛은 디지털 전류 신호를 입력받아 필터 계수에 기초하여 캐패시터에 전류 신호를 캐패시터에 충전 시키고, 출력 펄스 신호에 동기화하여 충전된 캐패시터의 전압을 출력한다.
      실시예에 따른 필터 회로에서, 필터 유닛의 각각은, 캐패시터와 디지털 전류 신호의 입력 사이에 위치한 제 1 스위치; 캐패시터와 출력 사이에 위치한 제 2 스위치를 더 포함하고, 제 1 스위치는 필터 계수에 기초하여 스위칭되고, 제 2 스위치는 출력 펄스 신호에 기초하여 스위칭되고, 캐패시터의 일 단은 제 1 스위치 및 제 2 스위치에 연결이 되고, 캐패시터의 다른 단은 그라운드에 연결이 되는 것이 바람직하다.
    • 数字非抽取滤波器,以及使用连续脉冲形成滤波器抽头的非抽取滤波器。
    • 6. 发明授权
    • 저잡음 증폭기 및 무선수신기
    • 低噪声放大器和无线接收器
    • KR101123211B1
    • 2012-03-20
    • KR1020110006022
    • 2011-01-20
    • 한국과학기술원
    • 이귀로김범겸임동구최재영
    • H03F1/26H04B1/16
    • H03F1/26H03F1/223H03F1/3205H03F1/565H03F2200/372H03F2200/391H03F2200/541H04B1/16
    • PURPOSE: A low noise amplifier and a radio receiver are provided to greatly improve linearity by using the body biasing and complementary superposition of a transistor. CONSTITUTION: A low noise amplifier is composed of a complementary common source low noise amplifier(100) linearized. The linearized complementary common source low noise amplifier comprises a first primary transistor part(110), a first subsidiary transistor part(120), and a capacitor(130) for simultaneously matching optimal noise and input impedance. The first primary transistor part comprises a first NMOS(N-Channel Metal Oxide Semiconductor) transistor, a first PMOS(P-Channel Metal Oxide Semiconductor) transistor, and resistance. The first subsidiary transistor part includes a first NMOS transistor of the first primary transistor part and transistors parallely connected to the first PMOS transistor. The capacitor for simultaneous matching is communally connected to output terminals of the first primary transistor part and the first subsidiary transistor part.
    • 目的:提供低噪声放大器和无线电接收器,通过使用晶体管的体偏置和互补叠加来大大提高线性度。 构成:低噪声放大器由互补的共源低噪声放大器(100)线性化组成。 线性化互补公共源低噪声放大器包括用于同时匹配最佳噪声和输入阻抗的第一初级晶体管部分(110),第一辅助晶体管部分(120)和电容器(130)。 第一主晶体管部分包括第一NMOS(N沟道金属氧化物半导体)晶体管,第一PMOS(P沟道金属氧化物半导体)晶体管和电阻。 第一辅助晶体管部分包括第一初级晶体管部分的第一NMOS晶体管和并联连接到第一PMOS晶体管的晶体管。 用于同时匹配的电容器共同连接到第一初级晶体管部分和第一辅助晶体管部分的输出端子。
    • 7. 发明公开
    • 광대역 튜너
    • 宽带调谐器
    • KR1020100013810A
    • 2010-02-10
    • KR1020080075507
    • 2008-08-01
    • 엘지전자 주식회사
    • 김홍득탁금영임동구이희섭
    • H04N5/50
    • PURPOSE: A broadband tuner is provided to receive terrestrial and cable TV broadcasting signals with superior performance and low power and realize a single chip. CONSTITUTION: An RF signal processor(100) processes RF signals of television broadcasting. A multi-phase local oscillating signal generator(110) generates local oscillating signals of phases. A plurality of mixers are made of a plurality of unit mixers. A complex mixer unit mixes multi-phase local oscillating signals to generate IF signals.
    • 目的:提供宽带调谐器来接收地面和有线电视广播信号,具有出色的性能和低功耗,实现单芯片。 构成:RF信号处理器(100)处理电视广播的RF信号。 多相本地振荡信号发生器(110)产生相位的本地振荡信号。 多个混合器由多个单元混合器制成。 复合混频器单元混合多相本地振荡信号以产生IF信号。
    • 8. 发明公开
    • 감쇠기
    • ATTENUATOR
    • KR1020080067459A
    • 2008-07-21
    • KR1020070004776
    • 2007-01-16
    • 엘지전자 주식회사
    • 임동구김홍득
    • H03H7/24
    • H03H7/24H01P1/22H03H11/24H03H17/0054H03H19/008
    • An attenuator is provided to perform a reliable attenuation by arranging a switching unit between a terminal of a signal input unit and a terminal of an attenuation unit. An attenuator includes a signal input unit, an attenuation unit(140), and a switch unit(130). The signal input unit receives a predetermined electric signal. The attenuation unit attenuates the amplitude of the electric signal inputted from the signal input unit. The switch unit switches so that the signal input unit is coupled to the attenuation unit in an operation state. The switch unit switches so that the signal input unit is isolated from the attenuation unit in a non-operation state. The switch unit is grounded to be isolated from the signal input unit and the attenuation unit between the signal input unit and the attenuation unit. The signal input unit receives a radio frequency signal.
    • 提供衰减器以通过在信号输入单元的端子和衰减单元的端子之间布置开关单元来执行可靠的衰减。 衰减器包括信号输入单元,衰减单元(140)和开关单元(130)。 信号输入单元接收预定的电信号。 衰减单元衰减从信号输入单元输入的电信号的幅度。 开关单元切换,使得信号输入单元在操作状态下耦合到衰减单元。 开关单元切换,使得信号输入单元在非操作状态下与衰减单元隔离。 开关单元接地,与信号输入单元和信号输入单元与衰减单元之间的衰减单元隔离。 信号输入单元接收射频信号。
    • 9. 发明公开
    • 저잡음 차동 증폭기
    • 低噪声差分放大器
    • KR1020080025910A
    • 2008-03-24
    • KR1020060090700
    • 2006-09-19
    • 엘지전자 주식회사
    • 임동구김홍득
    • H03F3/45H03F1/26
    • H03F3/45183H03F1/223H03F1/26H03F1/56H03F2200/216H03F2203/45018
    • A low noise differential amplifier is provided to increase an amplification gain and to improve a linearity without an additional power consumption by reducing impedance of junction between two input transistors and two cascade output transistors. A low noise differential amplifier includes two input transistors(M1,M2), two cascode output transistors(M3,M4), and a cross-coupler(111). The input transistors invert and amplify two input signals received at gates. The cascode output transistors are series-connected to the two input transistors and amplify the amplified signals from the input transistors. The cross-coupler cross-couples junction nodes between the input and cascode output transistors with gates of the caascode output transistors.
    • 提供低噪声差分放大器以增加放大增益,并且通过减少两个输入晶体管和两个级联输出晶体管之间的结的阻抗而无需额外的功耗来提高线性度。 低噪声差分放大器包括两个输入晶体管(M1,M2),两个共源共栅输出晶体管(M3,M4)和一个交叉耦合器(111)。 输入晶体管反相并放大在门处接收的两个输入信号。 串联输出晶体管串联连接到两个输入晶体管,并放大来自输入晶体管的放大信号。 交叉耦合器将输入和共源共栅输出晶体管之间的结点交叉耦合,并与串联输出晶体管的栅极连接。
    • 10. 发明公开
    • 광대역 저잡음 증폭기
    • 宽带低噪声放大器
    • KR1020080014140A
    • 2008-02-13
    • KR1020080010015
    • 2008-01-31
    • 엘지전자 주식회사
    • 임동구이귀로송성식김홍득
    • H03F1/26H03F1/42
    • H03F1/26H03F1/42H03F3/193H03F2200/294H03F2200/372
    • A wideband low noise amplifier is provided to increase a gain and linear property of the LNA by coupling common gate and common source LNAs with each other using current mirrors. A wideband low noise amplifier includes a common gate LNA(Low Noise Amplifier)(800), a constant current source, a current mirror(810), and a common source LNA(820). The common gate LNA amplifies a signal from an input terminal. The constant current source supplies a bias voltage to the common gate LNA. The current mirror amplifies the output signal from the common gate LNA and outputs the amplified result to an output terminal. The common source LNA amplifies the signal at the input terminal and outputs the amplified result at the output terminal. The common gate LNA is an NMOS transistor. The constant current source is a high frequency choke reactor.
    • 提供宽带低噪声放大器以通过使用电流镜将公共栅极和公共源LNA彼此耦合来增加LNA的增益和线性特性。 宽带低噪声放大器包括公共门LNA(低噪声放大器)(800),恒流源,电流镜(810)和公共源LNA(820)。 公共门LNA放大来自输入端子的信号。 恒流源向公共栅极LNA提供偏置电压。 电流镜放大来自公共门LNA的输出信号,并将放大的结果输出到输出端。 公共源LNA放大输入端的信号,并在输出端输出放大的结果。 公共栅极LNA是NMOS晶体管。 恒流源是高频扼流电抗器。