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    • 1. 发明公开
    • 고조파 제거기능을 갖는 전류 샘플링 믹서
    • 具有谐波抑制的电流采样混频器
    • KR1020090105372A
    • 2009-10-07
    • KR1020080030793
    • 2008-04-02
    • 삼성전기주식회사
    • 박경석김남흥김규석
    • H03D7/18
    • H03M1/804H03D7/14H03D2200/006H03D2200/0074H03D2200/0086
    • PURPOSE: A current sampling mixer with a harmonic rejection function is provided to obtain the harmonic rejection function by selecting and combining capacitors with the weight by changing the current sampler structure with the capacitors. CONSTITUTION: A first current source is connected to a first input terminal and supplies the positive current of an input signal. A second current source is connected to a second input terminal and supplies the negative current of an input signal. A charge selection unit(110) includes a plurality of charge switches. The charge switches are successively on for a charge time and are off for the sum output time. A capacitor circuit unit(120) includes a plurality of capacitor pairs connected to the charge switches. The capacitor pair includes a front capacitor and a rear capacitor. A weight selection unit(130) includes the weight switches. The weight switches are on for the charging time and are off for the sum output time to apply the weight. A filtering circuit(140) includes a plurality of output switches. The output switches are on for the sum output.
    • 目的:提供具有谐波抑制功能的电流采样混频器,通过用电容器改变电流采样器结构,通过选择和组合电容器来获得谐波抑制功能。 构成:第一电流源连接到第一输入端并提供输入信号的正电流。 第二电流源连接到第二输入端并提供输入信号的负电流。 电荷选择单元(110)包括多个充电开关。 充电开关连续导通充电时间,并在总和输出时间关闭。 电容器电路单元(120)包括连接到充电开关的多个电容器对。 电容器对包括前电容器和后电容器。 重量选择单元(130)包括重量开关。 重量开关打开充电时间,关闭总和输出时间以应用重量。 滤波电路(140)包括多个输出开关。 输出开关为和输出。
    • 2. 发明公开
    • 튜너
    • TUNER
    • KR1020090041076A
    • 2009-04-28
    • KR1020070106597
    • 2007-10-23
    • 엘지이노텍 주식회사
    • 강명구
    • H03J3/02
    • H03D7/14H03D7/161H03J5/244H04N5/50
    • A tuner is provided to improve the performance of reception by prevent the interference and the distortion caused by the harmonic frequency generated by the inside nonlinear element of the integrated circuit. An MOPLL integrated circuit(20) converts the high frequency signal into the intermediate frequency and outputs. The MOPLL integrated circuit comprises a mixer(21), an oscillator(22), and a phase-locked loop(23). The mixer mixes the tuned high frequency signal and the oscillation frequency and outputs the intermediate frequency. The oscillator generates the local oscillation frequency for the output of middle frequency of mixer. The oscillator comprises three oscillators(OSC1~OSC3) generating the high, middle, and base local oscillation frequency. The phase-locked loop comprises the charge pump(C/P). The charge pump comprises the cross modulation improvement part(231) for improving the cross modulation.
    • 提供调谐器以通过防止由集成电路的内部非线性元件产生的谐波频率引起的干扰和失真来提高接收性能。 MOPLL集成电路(20)将高频信号转换成中频并输出。 MOPLL集成电路包括混频器(21),振荡器(22)和锁相环(23)。 混频器将调谐的高频信号和振荡频率混合并输出中频。 振荡器产生混频器中频输出的本地振荡频率。 该振荡器包括产生高,中,和本地振荡频率的三个振荡器(OSC1〜OSC3)。 锁相环包括电荷泵(C / P)。 电荷泵包括用于改进交叉调制的交叉调制改进部分(231)。
    • 6. 发明授权
    • 공통모드 피드백 회로를 구비한 아이피투 교정회로 및아이피투 교정방법
    • 具有共模反馈电路的IP2校准电路和用于校准其相同的IP2的方法
    • KR100633770B1
    • 2006-10-13
    • KR1020050000764
    • 2005-01-05
    • 삼성전자주식회사
    • 김우년
    • H04B1/40
    • H03D7/14
    • 직접 변환 수신기 믹서의 2차 상호변조를 제어하기 위한 IP2 교정회로가 개시된다. IP2 교정회로는 믹서, 제 1 공통모드 피드백 회로, 제 2 공통모드 피드백 회로, 및 전류공급 회로를 구비한다. 믹서는 무선 입력신호를 기저대역의 신호로 직접 변환한다. 제 1 공통모드 피드백 회로는 믹서의 출력포트의 공통모드 전압을 검출하고 검출된 공통모드 전압을 부궤환시키고 공통모드 피드백 전압을 발생시킨다. 제 2 공통모드 피드백 회로는 출력포트의 공통모드 전압을 검출하고 게이트 제어신호에 응답하여 변화하는 루프 이득을 갖고, 출력포트의 어느 한 단자의 임피던스를 변화시킨다. 전류공급 회로는 공통모드 피드백 전압에 응답하여 믹서의 출력포트에 변화하는 전류를 공급한다. 따라서, IP2 교정회로는 공통모드 피드백 회로의 이득을 조절하여 IM2의 출력 전압을 최소화하고 IP2를 최대화할 수 있으며, 반도체 집적회로의 구현시 반도체 웨이퍼 상에서 차지하는 면적이 적다.
    • 7. 发明公开
    • 인접채널의 방해를 받기 어려운 텔레비전튜너의중간주파회로
    • 电视调谐器的中频电路
    • KR1020020079511A
    • 2002-10-19
    • KR1020020018937
    • 2002-04-08
    • 알프스 덴키 가부시키가이샤
    • 사사키미치노리
    • H04N5/50
    • H03D7/14
    • PURPOSE: To attenuate video intermediate frequency signals and sound intermediate frequency signals included in an adjacent channel without affecting the tuning characteristics of an intermediate frequency tuning circuit. CONSTITUTION: An intermediate frequency circuit is provided with an integrated circuit 1 incorporating a balanced mixer 2 having a first output end 2a and a second output end 2b, and a balanced intermediate frequency amplifier 3 having a first input end 3a and a second input end 3b. The first output end 2a and the first input end 3a and the second output end 2b and the second input end 3b are respectively connected by first capacitive elements 4 formed inside the integrated circuit 1. The integrated circuit 1 is provided with a first external terminal 1a connected to the first output end 2a, a second external terminal 1b connected to the second output end 2b, and a third external terminal 1c connected to the first input end 3a. The intermediate frequency tuning circuit 5 is connected between the first external terminal 1a and the second external terminal 1b, and the first external terminal 1a and the third external terminal 1c are connected by an inductance element 6.
    • 目的:衰减包括在相邻信道中的视频中频信号和声频中频信号,而不影响中频调谐电路的调谐特性。 构成:中频电路设置有集成电路1,该集成电路1包括具有第一输出端2a和第二输出端2b的平衡混频器2以及具有第一输入端3a和第二输入端3b的平衡中频放大器3 。 第一输出端2a和第一输入端3a以及第二输出端2b和第二输入端3b分别由形成在集成电路1内部的第一电容元件4连接。集成电路1设置有第一外部端子1a 连接到第一输出端2a,连接到第二输出端2b的第二外部端子1b和连接到第一输入端3a的第三外部端子1c。 中频调谐电路5连接在第一外部端子1a和第二外部端子1b之间,第一外部端子1a和第三外部端子1c通过电感元件6连接。
    • 10. 发明公开
    • 높은 다이내믹 레인지의 무선 수신기용 소형 혼합기 출력단
    • 无线接收器的高动态范围紧凑型混频器输出级
    • KR1020080030658A
    • 2008-04-04
    • KR1020087003223
    • 2006-06-29
    • 아카시아 리써치 그룹 엘엘씨
    • 이스마일,알리,엠.핫쳐,조프리유쏘우피안,에드워드야테스,데이브
    • H03D7/00
    • H03D7/00H03D7/14
    • A mixer is disclosed having an output stage with an amplifier or gain device configured in a feedback loop to maintain a virtual ground at the input to the gain device. The gain device provides significant dynamic range, gain, and the appropriate impedance matching to insure a low noise output signal of a desired magnitude. Use of an amplifying output stage removes the dependence between mixer gain and mixer configuration, such as mixer bias resistor value, while concurrently overcome undesirable flicker noise that results from use of active devices in the mixer bias structure. A stable virtual ground at the mixer output and gain device input provides linearity over frequency. The gain device may comprises an operational amplifier or trans-resistance / trans-conductance device.
    • 公开了一种具有输出级的混频器,放大器或增益器件配置在反馈环路中,以在增益器件的输入端保持虚拟接地。 增益器件提供了显着的动态范围,增益和适当的阻抗匹配,以确保具有所需幅度的低噪声输出信号。 使用放大输出级除去混频器增益和混频器配置之间的相关性,例如混频器偏置电阻值,同时克服在混频器偏置结构中使用有源器件导致的不期望的闪烁噪声。 混频器输出和增益器件输入端的稳定虚拟接地提供频率线性。 增益装置可以包括运算放大器或反电阻/反电导装置。