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公开(公告)号：US20120314602A1
公开(公告)日：2012-12-13
申请号：US13522662
申请日：2011-01-20
申请人： Jonas Persson , Sven Mattisson
发明人： Jonas Persson , Sven Mattisson
IPC分类号： H04W24/00
CPC分类号： H04B1/0475 , H04B1/302 , H04L25/061 , H04L27/2647 , H04L27/364 , H04L2027/0016
摘要： A combination of a phase shifter, a measurement receiver, and an offset estimator enable the d.c. offset in the transmit path of a quadrature transmitter to be distinguished from the d.c. offset in the measurement receiver. The measurement receiver performs a first measurement on the transmit path output with a “normal” phase shift of 0 degrees and 90 degrees for in-phase (I) and quadrature (Q) components, and a second measurement with a “special” phase shift for the I and Q components. In one embodiment, the “special” phase shift for the I and Q components is 180 degrees and 270 degrees, respectively.
摘要翻译： 移相器，测量接收器和偏移估计器的组合使得直流 在正交发射机的发射路径中的偏移量与d.c.进行区分。 在测量接收器中偏移。 测量接收机对于同相（I）和正交（Q）分量以0度和90度的正常相移对发射路径输出执行第一测量，并且对于I和 Q组件。 在一个实施例中，I和Q分量的特殊相移分别为180度和270度。
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公开(公告)号：US08185067B2
公开(公告)日：2012-05-22
申请号：US13015157
申请日：2011-01-27
申请人： Sven Mattisson , Magnus Nilsson
发明人： Sven Mattisson , Magnus Nilsson
CPC分类号： H03C3/40
摘要： A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.
摘要翻译： 用于射频发射机的调制电路包括本地振荡器电路，其被配置为以期望的频率产生一个或多个本地振荡器信号，占空比为或约为百分之二十五，而调制器被配置为产生一个或多个调制 响应于一个或多个本地振荡器信号的信号和一个或多个基带信息信号。 在至少一个实施例中，调制电路包括一个调制器，该调制器包括组合的混合和跨导电路，其包括用作每个基带信息信号的晶体管电路，用作调制器的调制输入。 每个晶体管电路包括由基带信息信号驱动的第一晶体管和将调制器输出节点耦合到对应的跨导元件，以及由一个或多个本地振荡器信号之一驱动的第二晶体管，并将相应的跨导元件耦合到信号地 节点。
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公开(公告)号：US20120028595A1
公开(公告)日：2012-02-02
申请号：US13205984
申请日：2011-08-09
IPC分类号： H04B7/00
CPC分类号： H04B1/44 , H04B1/3833 , H04B1/408 , H04B1/715 , H04B15/00 , H04B2001/7152 , H04J3/10 , H04L5/1461 , H04L27/122
摘要： An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
摘要翻译： 整个无线电收发器可以完全集成到一个IC芯片中。 为了在芯片上集成IF滤波器，使用具有低IF的外差架构。 单个直接调制的VCO用于传输期间的上转换和接收期间的下变频。 在VCO的振荡器槽中使用接合线作为谐振器。 在空中接口中使用TDD方案来消除串扰或泄漏。 高斯形二进制FSK调制方案用于提供许多其他实现优点。
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84.发明授权Methods and apparatus for suppressing strong-signal interference in low-IF receivers 有权抑制低中频接收机强信号干扰的方法和装置公开(公告)号：US08055234B2
公开(公告)日：2011-11-08
申请号：US12147962
申请日：2008-06-27
IPC分类号： H04B1/16
摘要： Circuits and methods are disclosed for compensating for received signal distortion caused by non-linearities in the receiver circuitry. An exemplary receiver circuit includes a distortion waveform generator configured to approximate one or more non-linear response characteristics of a downconverter circuit used to downconvert the received radio frequency signal. The estimated distortion waveform thus produced is filtered, using a filter or filters substantially similar to those used for filtering an intermediate frequency signal that includes the desired signal and non-linear distortion products caused by strong interfering signals. The filtered estimated distortion waveform and the intermediate frequency are sampled, to obtain a sampled distortion signal and a sampled signal of interest. The sampled distortion signal is scaled, and subtracted from the sampled signal of interest to obtain reduced-interference signal samples. In some embodiments, the scaling factor is determined by correlating the sampled signal of interest with the sampled distortion signal.
摘要翻译： 公开了用于补偿由接收机电路中的非线性引起的接收信号失真的电路和方法。 示例性接收器电路包括失真波形发生器，其被配置为近似用于下变频接收的射频信号的下变频器电路的一个或多个非线性响应特性。 使用与用于滤波包括由强干扰信号引起的期望信号和非线性失真产物的中频信号基本相似的滤波器或滤波器来滤波所产生的估计失真波形。 对经滤波的估计失真波形和中频进行采样，以获得采样的失真信号和感兴趣的采样信号。 采样的失真信号被缩放，并从感兴趣的采样信号中减去以获得减小干扰的信号样本。 在一些实施例中，通过将感兴趣的采样信号与采样的失真信号相关来确定缩放因子。
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公开(公告)号：US07995973B2
公开(公告)日：2011-08-09
申请号：US12339726
申请日：2008-12-19
IPC分类号： H04B1/40
CPC分类号： H04B1/525
摘要： Circuits and methods are disclosed for reducing interference from transmitter leakage in a radio transceiver. An exemplary method for reducing interference from transmitter leakage in a radio transceiver comprises downconverting, filtering, and sampling a radio frequency signal comprising a desired signal and a transmitter leakage signal to obtain a sampled signal of interest. The method further comprises generating a sampled distortion signal estimate that estimates one or more distortion products of the transmitter leakage signal, such as a squared amplitude obtained from a square-law device or corresponding digital function. Further, the method comprises dividing the sampled distortion signal estimate and the sampled signal of interest into a plurality of frequency channels. Finally, for a selected number of frequency channels, the method comprises combining the sampled distortion signal estimate for a frequency channel with the corresponding sampled signal of interest for the same frequency channel to obtain interference-reduced signal samples for the frequency channel.
摘要翻译： 公开了用于减少无线电收发器中发射机泄漏的干扰的电路和方法。 用于减少无线电收发机中的发射机泄漏的干扰的示例性方法包括对包括期望信号和发射机泄漏信号的射频信号进行下变频，滤波和采样，以获得感兴趣的采样信号。 该方法还包括生成估计发射机泄漏信号的一个或多个失真产物的采样失真信号估计，例如从平方律装置获得的平方振幅或相应的数字功能。 此外，该方法包括将采样的失真信号估计和所获取的采样信号分成多个频率信道。 最后，对于选定数量的频道，该方法包括将用于频率信道的采样失真信号估计与相同频率信道的对应采样信号组合，以获得用于频率信道的干扰减小信号样本。
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公开(公告)号：US07925030B2
公开(公告)日：2011-04-12
申请号：US11482595
申请日：2006-07-08
申请人： Michael Holmström , Bengt Edholm , Sven Mattisson
发明人： Michael Holmström , Bengt Edholm , Sven Mattisson
摘要： A method and ASIC for canceling crosstalk between a first stereo channel and a second stereo channel, wherein a first signal is input to a first output amplifier for the first channel, and a second signal is input to a second output amplifier for the second channel, and an output load for each output amplifier is connected between each output amplifier and a reference amplifier. In one embodiment, the first and second signals are split prior to inputting the signals to the first and second output amplifiers, and a gain-adjusted portion of each signal is added to the other signal on the inputs of the output amplifiers. In another embodiment, the first and second input signals are again split into two paths each. While a first path of each signal is inputted to each signal's respective output amplifier, the second paths of the first and second signals are adding together. The resulting sum is adjusted by a gain function, biased by a suitable DC voltage, and input to the reference amplifier.
摘要翻译： 一种用于消除第一立体声通道和第二立体声通道之间的串扰的方法和ASIC，其中第一信号被输入到第一通道的第一输出放大器，第二信号被输入到用于第二通道的第二输出放大器， 并且每个输出放大器的输出负载连接在每个输出放大器和参考放大器之间。 在一个实施例中，在将信号输入到第一和第二输出放大器之前，第一和第二信号被分离，并且每个信号的增益调整部分被添加到输出放大器的输入端上的另一个信号。 在另一个实施例中，第一和第二输入信号又被分成两个路径。 当每个信号的第一路径被输入到每个信号的相应输出放大器时，第一和第二信号的第二路径被加在一起。 所得到的和通过增益函数调整，由适当的直流电压偏置，并输入到参考放大器。
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公开(公告)号：US07890076B2
公开(公告)日：2011-02-15
申请号：US11551464
申请日：2006-10-20
IPC分类号： H04B1/26
CPC分类号： H03D7/1441 , H03D7/1458 , H03D7/165 , H03D2200/0023 , H03D2200/0084 , H03H19/008
摘要： A method of providing an input signal to a mixer circuit comprises coupling an output signal from a low-noise amplifier circuit to a mixer input of the mixer circuit via an AC coupling circuit, comprising an inductive of capacitive coupling circuit. For capacitive coupling configurations, a coupling capacitor is configured to have a capacitance value determined as a function of a transconductance sensitivity of the mixer circuit. For balanced output configurations of the low-noise amplifier circuit, matched coupling capacitors are used for coupling the balanced output signals to respective inputs of the mixer circuit. In one embodiment, the mixer circuit comprises a quadrature mixer circuit, which may be in a balanced or double-balanced configuration. In another embodiment, the mixer circuit comprises a four-phase mixer circuit, which may be configured as a balanced four-phase mixer circuit coupled to the low-noise amplifier circuit via inductive or capacitive embodiments of the coupling circuit.
摘要翻译： 一种向混频器电路提供输入信号的方法包括：通过AC耦合电路将来自低噪声放大器电路的输出信号耦合到混频器电路的混频器输入，该AC耦合电路包括电容耦合电路的电感。 对于电容耦合配置，耦合电容器被配置为具有根据混频器电路的跨导灵敏度确定的电容值。 对于低噪声放大器电路的平衡输出配置，匹配的耦合电容用于将平衡输出信号耦合到混频器电路的相应输入。 在一个实施例中，混频器电路包括正交混频器电路，其可以是平衡或双平衡配置。 在另一个实施例中，混频器电路包括四相混频器电路，其可以被配置为通过耦合电路的电感或电容实施例耦合到低噪声放大器电路的平衡四相混频器电路。
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公开(公告)号：US07672659B2
公开(公告)日：2010-03-02
申请号：US10746330
申请日：2003-12-23
申请人： Sven Mattisson
发明人： Sven Mattisson
CPC分类号： H03D7/1441 , H03D7/1433 , H03D7/1458 , H03D7/1491 , H03D2200/0025 , H03D2200/0043
摘要： A method and system for increasing the compression point of a receiver by deriving a feedback signal from mixer output signals. The feedback signal prevents the receiver from going into compression on strong out-of-band or blocking signals, while enhancing the receiver gain at the desired frequency. The desired frequency coincides with the local oscillator (LO) signal and is therefore particularly applicable for, but not limited to, homodyne receivers where selectivity can be made quite narrowband. Since the selectivity is coupled to the LO, a tunable receiver may be achieved that enables selectivity over a wide range of input frequencies.
摘要翻译： 一种用于通过从混频器输出信号导出反馈信号来增加接收机的压缩点的方法和系统。 反馈信号防止接收机在强大的带外或阻塞信号上进行压缩，同时在所需频率下增强接收机增益。 期望的频率与本地振荡器（LO）信号一致，因此特别适用于但不限于可以使选择性相当窄带的零差接收机。 由于选择性耦合到LO，所以可以实现可调谐的接收器，其可以在宽范围的输入频率上实现选择性。
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公开(公告)号：US20090268643A1
公开(公告)日：2009-10-29
申请号：US12501616
申请日：2009-07-13
IPC分类号： H04B7/005
CPC分类号： H04B1/44 , H04B1/3833 , H04B1/408 , H04B1/715 , H04B15/00 , H04B2001/7152 , H04J3/10 , H04L5/1461 , H04L27/122
摘要： An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
摘要翻译： 整个无线电收发器可以完全集成到一个IC芯片中。 为了在芯片上集成IF滤波器，使用具有低IF的外差架构。 单个直接调制的VCO用于传输期间的上转换和接收期间的下变频。 在VCO的振荡器槽中使用接合线作为谐振器。 在空中接口中使用TDD方案来消除串扰或泄漏。 高斯形二进制FSK调制方案用于提供许多其他实现优点。
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公开(公告)号：US07511586B2
公开(公告)日：2009-03-31
申请号：US10550827
申请日：2004-03-19
申请人： Sven Mattisson
发明人： Sven Mattisson
IPC分类号： H03B29/00
CPC分类号： H03F3/45 , H03B29/00 , H03F3/45188 , H03F3/4565 , H03F3/68 , H03K3/84
摘要： A device for generating a noise signal, which may be used for generating a truly random sequence (10) of bits is disclosed. The device comprises a noise source (11), and an amplifier (12) connected to the noise source (11). The device according noise source according to the invention is protected from interfering signals to provide high noise-interference ratio. Further, the present invention relates to an integrated circuit and an electronic apparatus comprising the device for generating a noise signal according to the invention.
摘要翻译： 公开了一种用于产生噪声信号的装置，其可用于产生真正的随机序列（10）的位。 该装置包括噪声源（11）和连接到噪声源（11）的放大器（12）。 根据本发明的根据噪声源的设备被保护免受干扰信号以提供高的噪声干扰比。 此外，本发明涉及一种集成电路和电子设备，其包括根据本发明的用于产生噪声信号的装置。
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