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    • 81. 发明授权
      EP1423910B1 RECEIVER 有权
    • RECEIVER
    • 接收器
    • EP1423910B1
    • 2007-01-10
    • EP02797945.9
    • 2002-09-01
    • Semiconductor Ideas to The Market (ItoM) BV
    • KASPERKOVITZ, Wolfdietrich, Georg
    • H03D3/00
    • H03D5/00 , H03D3/009 , H03D3/241
    • Receiver comprising an RF front end circuit for a selection and conversion of an RF input signal into a pair of quadrature IF (intermediate frequency) signals being supplied through in-phase and phase quadrature signal paths to signal inputs of quadrature phase detection means included in a (PLL) phase locked loop, an output of said quadrature phase detection means being coupled through a loop filter to a control input of a quadrature IF oscillator supplying a pair of quadrature IF oscillator signals to carrier inputs of said quadrature phase detection means. To suppress amplitude and phase mismatch deteriorating proper mirror cancellation said quadrature phase detection means is coupled to amplitude and phase error detection means for a detection of amplitude and phase errors in the output signal of said quadrature phase detection means and a quadrature frequency doubler is coupled between the quadrature local oscillator and carrier inputs of said amplitude and phase error detection means to supply respectively thereto in-phase and phase quadrature error detection carrier signals at twice the IF carrier frequency of said pair of quadrature IF signals, said amplitude and phase error detection means respectively providing amplitude and phase error signals through first and second low-pass filters to an amplitude correction circuit and a phase correction circuit preceding at least one of the inputs of said quadrature phase detection means for a negative feedback of said amplitude and phase errors.
    • 接收器包括RF前端电路，用于选择RF输入信号并将其转换为一对正交IF（中频）信号，通过同相和正交相位信号路径将其提供给正交相位检测装置的信号输入，正交相位检测装置包括在 （PLL）锁相环，所述正交相位检测装置的输出端通过环路滤波器耦合到正交IF振荡器的控制输入端，将一对正交IF振荡器信号提供给所述正交相位检测装置的载波输入端。 为了抑制恶化适当反射镜消除的幅度和相位失配，所述正交相位检测装置被耦合到幅度和相位误差检测装置，用于检测所述正交相位检测装置的输出信号中的幅度和相位误差，并且正交倍频器被耦合 所述幅度和相位误差检测装置的正交本地振荡器和载波输入端分别向所述一对正交IF信号的两倍IF载波频率提供同相和正交相位误差检测载波信号，所述幅度和相位误差检测装置 分别通过第一和第二低通滤波器将振幅和相位误差信号提供给振幅校正电路和在所述正交相位检测装置的至少一个输入之前的相位校正电路，用于所述振幅和相位误差的负反馈。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 85. 发明公开
      EP0580269A3 Signal filter 失效
    • Signal filter
    • 信号过滤器
    • EP0580269A3
    • 1994-03-09
    • EP93202863.2
    • 1989-10-12
    • Systron Donner Corporation
    • Newell, Gerald Richard , Bhardwaj, Pradeep
    • H04B1/12 , H03H17/02
    • H03D5/00 , H03H11/04 , H04B1/30
    • An analog baseband signal (32) modulates a reference frequency carrier signal (38) to provide a double sideband, suppressed-carrier DSB-SC signal. The DSC-SC signal is converted in a voltage-to-frequency converter (54) to a series of pulses, the repetition rate of which is proportional to the level of the DSB-SC signal. The output signal of the voltage-to-frequency converter is demodulated to produce a digitally formatted version (62) of the baseband signal. A notch filter to reflect an undesired signal is provided as a feedback path from the output voltage-to-frequency converter (54) to a negative input of a summer (48) in the input line of the DSB-SC signal. The feedback path converts the frequency signal from converter (54) to a cancellation signal having the format of the undesired signal.
    • 模拟基带信号（32）调制参考频率载波信号（38）以提供双边带抑制载波DSB-SC信号。 DSC-SC信号在电压 - 频率转换器（54）中被转换成一系列脉冲，其重复频率与DSB-SC信号的电平成比例。 电压 - 频率转换器的输出信号被解调以产生基带信号的数字格式化版本（62）。 作为从输出电压 - 频率转换器（54）到DSB-SC信号的输入线中加法器（48）的负输入的反馈路径，提供反射不需要的信号的陷波滤波器。 反馈路径将来自转换器（54）的频率信号转换成具有非期望信号格式的消除信号。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 86. 发明公开
      EP0523779A1 Direct conversion receiver 失效
    • Direct conversion receiver
    • Empfängermit Direktumsetzung。
    • EP0523779A1
    • 1993-01-20
    • EP92202043.3
    • 1992-07-07
    • Philips Electronics N.V.
    • Den Braber, Gerard Paul
    • H04B1/30 , H03D1/22
    • H04B1/1653 , H03D1/2236 , H03D3/242 , H03D3/245 , H03D5/00 , H04B1/30
    • Receiver having an RF input for applying an RF input carrier-modulated modulation signal thereto, which receiver is coupled to a multiplier circuit and to a phase-locked loop (PLL) with a signal path incorporating a phase detector, a loop filter, a first dc decoupling circuit and a controlled oscillator having an in-phase and a quadrature output via which local in-phase and quadrature carriers are applied to the multiplier circuit and the phase detector, respectively, and a signal generator for generating a local auxiliary pilot and a pilot detector for detecting the local auxiliary pilot, an output of which is coupled to the controlled oscillator via a low-pass filter. In order to reduce the influence of oscillator radiation and other parasitic crosstalk effects on the dc reduction, an output of the signal generator is coupled to the signal path of the phase-locked loop between an output of the phase detector and a control input of the controlled oscillator, an output of the multiplier circuit is coupled to a first input and the output of the signal generator is coupled to a second input of the pilot detector.
    • 具有用于向其施加RF输入载波调制调制信号的RF输入的接收机，该接收机与乘法器电路和具有并入有相位检测器的信号路径的锁相环（PLL）耦合，环路滤波器，第一 DC去耦电路和具有同相和正交输出的受控振荡器，通过该输出将局部同相和正交载波分别施加到乘法器电路和相位检测器，以及信号发生器，用于产生局部辅助导频和 用于检测本地辅助导频的导频检测器，其输出经由低通滤波器耦合到受控振荡器。 为了减少振荡器辐射和其他寄生串扰对DC降低的影响，信号发生器的输出端耦合到相位检测器的输出端和相位检测器的输入端之间的锁相环路的信号路径 所述乘法器电路的输出耦合到第一输入，并且所述信号发生器的输出耦合到所述导频检测器的第二输入端。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 87. 发明公开
      EP0486095A1 Digital receiver 失效
    • Digital receiver
    • DigitalerEmpfänger
    • EP0486095A1
    • 1992-05-20
    • EP91202892.5
    • 1991-11-07
    • Philips Electronics N.V.
    • Gielis, Gerardus Christiaan Maria , van der Plassche, Rudy Johan
    • H03D3/00
    • H04N5/44 , H03B23/00 , H03B28/00 , H03B2200/0092 , H03D1/2245 , H03D3/006 , H03D3/007 , H03D5/00 , H03D7/00 , H03D2200/005 , H03D2200/0054
    • Receiver comprising an A/D converter (5) for digitally sampling an analog signal modulated on a carrierfrequency at a first sampling frequency, consecutively coupled to a digital quadrature mixer stage (6) for a carrier frequency shift of the digitized modulated signal from the A/D converter, a digital filter device (10,11) for selecting the phase quadrature signals of the quadrature mixer stage and for decimating the sampling frequency from said first sampling frequency to a second sampling frequency, and a digital demodulation device (12,13). To obtain a receiver which can be easily realised in an integrated form and for which less crystal surface is required than for the digital integrable receivers hitherto known, and which is particularly suitable for receiving RF radio or TV broadcast signals, the digital quadrature mixer stage comprises a first coordinate rotation digital computer (Cordic) (9) in the rotation mode, having at least a first signal input which is coupled to an output of the A/D converter and a phase signal input to which a periodical digital sawtooth-shaped phase signal is applied from a digital sawtooth generator (SG) for a periodical 2π phase rotation of at least the signal applied to the computer via the first signal input at a repetition frequency which is equal to the magnitude of said carrierfrequency shift.
    • 接收机包括：A / D转换器（5），用于以第一采样频率数字采样在载波频率上的模拟信号，连续地耦合到数字正交混频器级（6），用于来自A的数字化调制信号的载波频移 / D转换器，用于选择正交混频器级的相位正交信号并将采样频率从所述第一采样频率抽取到第二采样频率的数字滤波器装置（10,11），以及数字解调装置（12,13 ）。 为了获得能够容易地以集成形式实现的接收机，并且与迄今为止已知的数字可积分接收机相比，需要较少的晶体表面，并且其特别适用于接收RF无线电或TV广播信号，数字正交混频器级包括 旋转模式中的第一坐标旋转数字计算机（Cordic）（9），具有耦合到A / D转换器的输出端的至少第一信号输入端和输入周期性的数字锯齿形相位的相位信号输入端 信号从数字锯齿波发生器（SG）施加，用于至少通过第一信号输入施加到计算机的信号的周期性2π相位旋转，其重复频率等于所述载波频率的幅度。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 89. 发明公开
      EP0276144A2 Signal receiver for terrestrial and satellite broadcastings 失效
    • Signal receiver for terrestrial and satellite broadcastings
    • EmpfängerfürErd- und Satellitenrundfunk。
    • EP0276144A2
    • 1988-07-27
    • EP88300463.2
    • 1988-01-20
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Sakashita, Seiji , Ozeki, Hiroaki , Kanno, Ippei
    • H03D5/00
    • H03D5/00
    • A signal receiver which is capable of receiving and demodulating a satellite broadcasting signal which is an FM signal and a terrestrial broadcasting signal which is an AM signal is disclosed. FM and AM signals are frequency-converted into signals having frequencies in a same intermediate frequency band by making common use of a radio frequency amplifier, a mixer, a local oscillator and an intermediate frequency filter. At the time of reception of an FM signal, the FM signal is demodulated in a phase-locked loop circuit, and a local oscillator is subjected to frequency modulation by a part of the demodulated signal, thereby constituting an FM negative feedback loop, and thus narrowing the occupied bandwidth of the FM signal. At the time of reception of an AM signal, the phase-locked loop circuit is used to regenerate a carrier, and the output signal of the phase-locked loop circuit is input to a multiplier to effect synchronous detection of the input signal. At this time, the FM negative feedback to the local oscillator is utilized to effect automatic frequency control, thereby achieving stabilization of the synchronous detection.
    • 公开了能够接收和解调作为FM信号的卫星广播信号和作为AM信号的地面广播信号的信号接收机。 通过共同使用射频放大器，混频器，本地振荡器和中频滤波器，FM和AM信号被频率转换成具有相同中频频率的信号。 在接收到FM信号时，FM信号在锁相环电路中被解调，并且本地振荡器被解调信号的一部分进行频率调制，由此构成FM负反馈回路 缩小FM信号的占用带宽。 在接收到AM信号时，使用锁相环电路来再生载波，并且将锁相环电路的输出信号输入到乘法器以进行输入信号的同步检测。 此时，利用本地振荡器的FM负反馈来实现自动频率控制，从而实现同步检测的稳定。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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