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公开(公告)号：US07558543B2
公开(公告)日：2009-07-07
申请号：US11439540
申请日：2006-05-24
Applicant: Ali Isaac , Nicholas Paul Cowley
Inventor： Ali Isaac , Nicholas Paul Cowley
Abstract: A radio frequency tuner includes a first quadrature frequency changer, I and Q filters which are electronically adjustable, and a second quadrature frequency changer. During alignment of the filters, an alignment controller connects a test tone generator to the input of the frequency converter and the generator supplies a sequence of test tones of different accurately known frequencies. The amplitude of the resulting signals at the output of one of the filters is measured by a level detector. The controller compares the measured levels with a desired frequency response and adjusts the filter accordingly. The controller then causes the generator to supply a sequence of two test tones of different frequencies and a differential phase detector measures the phase difference between the output signals of the mixers of the second frequency changer. The controller adjusts the response of the other filter and the test procedure is repeated until phase imbalances between the filters are substantially reduced or eliminated.
Abstract translation: 射频调谐器包括第一正交变频器，可电子调节的I和Q滤波器以及第二正交变频器。 在滤波器对准期间，对准控制器将测试音发生器连接到变频器的输入端，并且发生器提供不同精确已知频率的测试音调序列。 一个滤波器的输出端产生的信号的幅度由电平检测器测量。 控制器将测量的电平与所需的频率响应进行比较，并相应地调整滤波器。 然后，控制器使发生器提供不同频率的两个测试音调的序列，并且差分相位检测器测量第二变频器的混频器的输出信号之间的相位差。 控制器调节其他过滤器的响应，重复测试程序，直到过滤器之间的相位不平衡显着减少或消除。
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82.发明授权公开(公告)号：US07558189B2
公开(公告)日：2009-07-07
申请号：US10511830
申请日：2003-04-18
Applicant: Akihiko Yoneya
Inventor： Akihiko Yoneya
CPC classification number: H03D3/007 , H03D7/166 , H04B1/26 , H04L27/2647
Abstract: According to an image signal cancel-type heterodyne reception method, I-phase and Q-phase intermediate-frequency signals can be modulated using two orthogonal signals, superimposed one on the other, amplified by one amplifier, and modulated using two modulated orthogonal signals, thereby amplifying I-phase and Q-phase signals by one amplifier. Therefore, it is possible to obtain a high image signal cancellation ratio with no difference in gain for both of the phases. According to a direct conversion orthogonal frequency division reception method, on the other hand, two-phase base-band signals can be amplified respectively by one amplifier to eliminate a difference in gain between amplifications of the two-phase base-bands, thereby realizing high non-interference between sub-carriers.
Abstract translation: 根据图像信号消除型外差接收方法，可以使用两个正交信号调制I相和Q相中频信号，一个彼此叠加，由一个放大器放大，并使用两个调制的正交信号进行调制， 从而通过一个放大器放大I相和Q相信号。 因此，可以获得两个相位的增益无差异的高图像信号消除比。 另外，根据直接转换正交频分接收方法，可以通过一个放大器分别对两相基带信号进行放大，以消除两相基带的放大率之间的增益差，从而实现高 副载波之间的不干扰。
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公开(公告)号：US07555273B2
公开(公告)日：2009-06-30
申请号：US11330275
申请日：2006-01-11
Applicant: Dominique Morche
Inventor： Dominique Morche
IPC: H04B1/16
Abstract: A bandpass filtering method in which two frequency transpositions are performed in parallel on an input signal (SE) for filtering using respective first and second upstream mixing signals (SM1, SM2). A common oscillator (LO) is used which is coupled with a first phase shifter (MTM) to produce upstream mixing signals and which is coupled with a second phase shifter (MTV) to produce downstream mixing signals. Phase shifters are used in opposite manner on first and second signals so that each of said first and second signals (VT1, VT2) receives the phase-advanced output signal from one of the two phase shifters and the phase-delayed output signal from the other of the two phase shifters.
Abstract translation: 一种带通滤波方法，其中使用相应的第一和第二上游混合信号（SM1，SM2）对输入信号（SE）并行执行两次频率转换以进行滤波。 使用与第一移相器（MTM）耦合以产生上游混频信号并与第二移相器（MTV）耦合以产生下游混频信号的公共振荡器（LO）。 移相器在第一和第二信号上以相反的方式使用，使得所述第一和第二信号（VT1，VT2）中的每一个从两个移相器之一接收相位超前的输出信号，并从另一个移相器接收相位延迟的输出信号 的两个移相器。
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公开(公告)号：US07548742B2
公开(公告)日：2009-06-16
申请号：US10784838
申请日：2004-02-23
Applicant: Richard A. Johnson
Inventor： Richard A. Johnson
CPC classification number: H03D7/1441 , H03C3/403 , H03D7/1433 , H03D7/1458 , H03D7/1483 , H03D7/166 , H03D2200/0043 , H03D2200/0047 , H03D2200/009
Abstract: A tuner architecture is disclosed that mixes an analog RF input signal and a digital local oscillator signal to generate a output signal at a desired IF frequency, including low-IF and zero-IF solutions. The tuner provides a number of advantages over previous implementations, such as improved performance for low-IF and zero-IF architectures and a significant reduction in interference between adjacent paths in a multiple tuner solution. Other features and variations can be implemented, if desired, and related methods can be utilized, as well.
Abstract translation: 公开了一种调谐器架构，其混合模拟RF输入信号和数字本地振荡器信号以产生期望的IF频率的输出信号，包括低中频和零中频解。 调谐器提供了许多优于先前实现的优点，例如用于低中频和零中频架构的改进的性能以及在多调谐器解决方案中相邻路径之间的干扰的显着降低。 如果需要，可以实现其它特征和变化，并且也可以使用相关方法。
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公开(公告)号：US20090111414A1
公开(公告)日：2009-04-30
申请号：US11955201
申请日：2007-12-12
Applicant: Gurkanwal Singh Sahota , Frederic Bossu , Ojas M. Choksi
Inventor： Gurkanwal Singh Sahota , Frederic Bossu , Ojas M. Choksi
IPC: H04B1/16
CPC classification number: H03D7/1441 , H03D7/165 , H03D7/166 , H03D2200/0084 , H03D2200/009
Abstract: Selectable sizes for a local oscillator (LO) buffer and mixer are disclosed. In an embodiment, LO buffer and/or mixer size may be increased when a receiver operates in a high gain mode, while LO buffer and/or mixer size may be decreased when the receiver operates in a low gain mode. In an embodiment, LO buffer and mixer sizes are increased and decreased in lock step. Circuit topologies and control schemes for specific embodiments of LO buffers and mixers having adjustable size are disclosed.
Abstract translation: 公开了本地振荡器（LO）缓冲器和混频器的可选尺寸。 在一个实施例中，当接收机以高增益模式工作时，可以增加LO缓冲器和/或混频器的大小，而当接收器以低增益模式工作时，可以减小LO缓冲器和/或混频器的大小。 在一个实施例中，LO缓冲器和混合器尺寸在锁定步骤中增加和减小。 公开了具有可调节尺寸的LO缓冲器和混合器的具体实施例的电路拓扑和控制方案。
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Patent Agency Ranking
公开(公告)号：US20080284487A1
公开(公告)日：2008-11-20
申请号：US12144986
申请日：2008-06-24
Applicant: Rajasekhar Pullela , Mohamed El Said
Inventor： Rajasekhar Pullela , Mohamed El Said
IPC: G06G7/12
CPC classification number: H03D7/166 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/1483 , H03D7/165 , H03D2200/0019 , H04B1/28
Abstract: A passive mixer include a switching architecture configured to generate differential in-phase (I) and differential quadrature-phase (Q) signals using differential components of the in-phase (I) and quadrature-phase (Q) signals operating on transitions of an approximate 25% duty cycle signal.
Abstract translation: 无源混频器包括被配置为使用在同相（I）和正交相位（Q）信号上的差分分量来产生差分同相（I）和差分正交相位（Q）信号的开关架构， 约25％的占空比信号。
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87.发明授权公开(公告)号：US07403761B2
公开(公告)日：2008-07-22
申请号：US11523785
申请日：2006-09-19
Applicant: Kirk B. Ashby , Albert H. Taddiken , S. Vincent Birleson
Inventor： Kirk B. Ashby , Albert H. Taddiken , S. Vincent Birleson
CPC classification number: H03D7/166
Abstract: Frequency translation, such as frequency up conversion of a video baseband or intermediate frequency to a desired frequency division broadcast channel, is provided utilizing a single sideband or image reject mixer and filtering having relaxed selectivity requirements. According to a preferred embodiment, a first single sideband mixer accepts an input signal at an intermediate frequency and up converts this signal to a high intermediate frequency. The image rejection provided by the single sideband mixer in combination with simple filtering provide sufficient signal quality to achieve desired levels of desired signal isolation, such as on the order of 40 dB. Preferably, a second single sideband mixer accepts the high intermediate frequency signal and down converts this signal to a desired transmission or broadcast frequency. The image rejection provided by the single sideband mixers in combination with simple filtering provide sufficient desired signal isolation, such as on the order of 40 dB, thereby relax the linearity requirements of amplifiers utilized in the frequency translation system. A preferred embodiment of the present invention disposes all or substantially all the frequency translation circuit elements on a single substrate.
Abstract translation: 使用单个边带或图像拒绝混合器以及具有放宽的选择性要求的滤波器来提供频率转换，诸如将视频基带或中频上变频到期望的频分广播信道。 根据优选实施例，第一单边带混频器接收中频处的输入信号，并将该信号上变频到高中频。 由单边带混频器提供的图像抑制与简单滤波相结合提供了足够的信号质量以达到期望的信号隔离度，例如大约40dB。 优选地，第二单边带混频器接受高中频信号，并将该信号下变频到期望的传输或广播频率。 由单边带混频器提供的图像抑制与简单滤波相结合提供了足够的期望信号隔离度，例如大约40dB，从而放宽了在频率转换系统中使用的放大器的线性度要求。 本发明的优选实施例将所有或基本上所有的频率平移电路元件配置在单个衬底上。
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公开(公告)号：US20080139149A1
公开(公告)日：2008-06-12
申请号：US11609399
申请日：2006-12-12
Applicant: Fenghao Mu , Andreas T. Martensson , Magnus Nilsson
Inventor： Fenghao Mu , Andreas T. Martensson , Magnus Nilsson
CPC classification number: H04B1/18 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/1483 , H03D7/165 , H03D7/166 , H03D2200/0023 , H03D2200/0025 , H03D2200/0043 , H03D2200/0088 , H03D2200/009
Abstract: A frequency conversion receiver comprises a passive mixer, a Low-Noise Amplifier (LNA) and a balun. The low-noise amplifier generates an amplified single-ended signal responsive to a single-ended receiver input signal. The passive mixer generates a mixer output signal responsive to a differential mixer input signal and a four-phase local oscillator signal. The balun transforms the amplified singled-ended signal into the differential mixer input signal, the balun having a first winding coupled to an output of the low-noise amplifier and a second winding coupled to an input of the passive mixer, the second winding having more turns than the first winding. The turn ratio of the second winding to the first winding provides gain compensation to the low-noise amplifier, and in conjunction with the low-noise amplifier and the passive mixer, provides a desired gain to the receiver and linearity over a dynamic range of the receiver input signal.
Abstract translation: 变频接收机包括无源混频器，低噪声放大器（LNA）和平衡 - 不平衡转换器。 低噪声放大器响应于单端接收机输入信号产生放大的单端信号。 无源混频器响应差分混频器输入信号和四相本地振荡器信号产生混频器输出信号。 平衡不平衡变压器将放大的单端信号变换成差分混频器输入信号，平衡 - 不平衡转换器具有耦合到低噪声放大器的输出的第一绕组和耦合到无源混频器的输入的第二绕组，第二绕组具有更多 比第一个绕组转。 第二绕组与第一绕组的匝数比向低噪声放大器提供增益补偿，并且与低噪声放大器和无源混频器一起为接收器提供期望的增益，并且在动态范围内的线性度 接收机输入信号。
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公开(公告)号：US20060160518A1
公开(公告)日：2006-07-20
申请号：US11302531
申请日：2005-12-12
Applicant: Kishore Seendripu , Raymond Montemayor , Sheng Ye , Glenn Chang , Curtis Ling
Inventor： Kishore Seendripu , Raymond Montemayor , Sheng Ye , Glenn Chang , Curtis Ling
IPC: H04B1/26
CPC classification number: H04B1/26 , H03D3/007 , H03D3/008 , H03D3/009 , H03D7/14 , H03D7/1441 , H03D7/1458 , H03D7/1475 , H03D7/165 , H03D7/166 , H03D2200/0086 , H03H11/22 , H04B1/10 , H04B1/109 , H04B1/12 , H04B1/30 , H04B15/00 , H04J1/18 , H04L27/34
Abstract: Receiver architectures and methods of processing harmonic rich input signals employing harmonic suppression mixers are disclosed herein. The disclosed receivers, mixers, and methods enable a receiver to achieve the advantages of switching mixers while greatly reducing the mixer response to the undesired harmonics. A harmonic mixer can include a plurality of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection.
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公开(公告)号：US07079823B1
公开(公告)日：2006-07-18
申请号：US09980027
申请日：2000-05-26
Applicant: Dominique Morche
Inventor： Dominique Morche
IPC: H04B1/16
Abstract: The invention provides a bandpass filtering method in which two frequency transpositions are performed in parallel on an input signal for filtering using respective first and second upstream mixing signals that are substantially in phase quadrature, and two respective downstream mixing signals, and the sum or the difference of the two signals obtained in this way is taken, the frequency of the downstream mixing signals is selected to be different from the frequency of the first and second mixing signals so that the output signal is transposed into a desired frequency range, the method being characterized in that a common oscillator is used which is coupled with a first phase shifter to produce the upstream mixing signals and which is coupled with a second phase shifter to produce the downstream mixing signals, and in that the phase shifters are used in opposite manner on the first and second signals so that each of said first and second signals receives the phase-advanced output signal from one of the two phase shifters and the phase-delayed output signal from the other of the two phase shifters.
Abstract translation: 本发明提供了一种带通滤波方法，其中使用相当于相位正交的各自的第一和第二上游混合信号以及两个相应的下游混合信号并行地对并行地输入两个频率转换， 以这种方式获得的两个信号中，下游混合信号的频率被选择为不同于第一和第二混合信号的频率，使得输出信号被转置到期望的频率范围内，该方法被表征 因为使用与第一移相器耦合的公共振荡器以产生上游混频信号，并且与第二移相器耦合以产生下游混频信号，并且移相器以相反的方式在 第一和第二信号，使得所述第一和第二信号中的每一个接收相位超前输出信号 来自两个移相器中的一个和来自两个移相器中的另一个的相位延迟的输出信号。
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