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81. 发明授权

US08218688B2 Quadrature demodulator and interrogator 有权
标题翻译：正交解调器和询问器
公开(公告)号：US08218688B2
公开(公告)日：2012-07-10
申请号：US12215209
申请日：2008-06-25
申请人： Nobuo Murofushi , Sadatoshi Oishi
发明人： Nobuo Murofushi , Sadatoshi Oishi
IPC分类号： H04L27/00
CPC分类号： H03D3/008 , H04B1/525
摘要： A quadrature demodulator generates an I-signal from a modulated reception signal and a local signal, generates a Q-signal from the local signal and the local signal having a phase shifted through 90 degrees. Capacitors remove DC components from the I- and Q-signals. Low-pass filters remove frequency components higher than the frequencies of the I- and Q-signals. An I-signal squaring section squares the I-signal having passed through the low-pass filters. A Q-signal squaring section squares the Q-signal having passed through the low-pass filters. An adding section adds the squared I-signal and the squared Q-signal together. A comparator then compares the level of an S1 signal resulting from the addition with a threshold to obtain an S2 signal. A data generating section of a digital signal processing section executes a process of inverting the signal level of the S2 signal at every rising edge of the S2 signal to demodulate reception data.
摘要翻译：正交解调器从调制的接收信号和本地信号产生I信号，从本地信号产生Q信号，并且具有相移90度的本地信号。电容从I和Q信号中去除直流分量。低通滤波器去除高于I和Q信号频率的频率分量。 I信号平方部对通过低通滤波器的I信号进行平方。 Q信号平方部对通过低通滤波器的Q信号进行平方。加法部分将平方的I信号和平方Q信号相加在一起。比较器然后将从加法产生的S1信号的电平与阈值进行比较以获得S2信号。数字信号处理部分的数据产生部分执行在S2信号的每个上升沿使S2信号的信号电平反相的处理，以解调接收数据。

82. 发明授权

US07983648B2 Low intermediate frequency receiver and the same method thereof 有权
标题翻译：低中频接收机及其相同方法
公开(公告)号：US07983648B2
公开(公告)日：2011-07-19
申请号：US11813993
申请日：2006-01-10
申请人： Xuecheng Qian
发明人： Xuecheng Qian
IPC分类号： H04B1/26
CPC分类号： H04B1/0007 , H03D3/008 , H03D7/165 , H04B1/30
摘要： The present invention provides a low intermediate frequency receiver for receiving radio frequency signal and provides the sampling method thereof. The low intermediate frequency receiver firstly samples the radio frequency signal so as to convert it into digital signal of non-zero frequency domain. Secondly it compensates the digital signal of non-zero frequency domain to filter out the interfering signal therein. Finally, the compensated digital signal is frequency-shifted to the zero frequency domain. By using the low intermediate frequency receiver and the sampling method thereof according to the present invention, the interference at the zero frequency, like DC drift and intermodulation component, could be easily filtered out without imposing any great influence on the useful signals.
摘要翻译：本发明提供一种用于接收射频信号的低中频接收机，并提供其采样方法。低中频接收机首先对射频信号进行采样，将其转换为非零频域的数字信号。其次，补偿非零频域的数字信号，以滤除其中的干扰信号。最后，补偿数字信号被频移到零频域。通过使用根据本发明的低中频接收机及其采样方法，可以容易地滤除在零频率处的干扰，如DC漂移和互调分量，而不对有用信号施加任何巨大影响。

83. 发明授权

US07917114B2 DC cancellation circuit 失效
标题翻译：直流消除电路
公开(公告)号：US07917114B2
公开(公告)日：2011-03-29
申请号：US11392868
申请日：2006-03-30
申请人： Amit Bagchi , Rohit Gaikwad
发明人： Amit Bagchi , Rohit Gaikwad
IPC分类号： H04B1/06 , H04B7/00 , H04B1/28
CPC分类号： H03F1/26 , H03D3/008 , H03F1/34 , H03F3/24 , H03F3/45475 , H03F3/45968 , H03F2200/294 , H03F2200/372 , H04B1/30
摘要： The present invention relates to a DC offset canceling circuit. In one aspect of the invention, a DC offset canceling circuit with independently configurable gain and roll-off frequency is provided. In one embodiment of the present invention, the DC offset canceling circuit is used in the receive path of a down-conversion wireless receiver. In another aspect of the invention, a method for independently varying the gain and the roll-off frequency of the DC offset canceling circuit is provided. In one embodiment, the method is used to independently operate a gain control scheme and a DC offset cancellation strategy in a DC canceling circuit.
摘要翻译：本发明涉及一种DC偏移抵消电路。在本发明的一个方面，提供了具有独立可配置的增益和滚降频率的DC偏移消除电路。在本发明的一个实施例中，DC偏移消除电路用于下变频无线接收机的接收路径。在本发明的另一方面，提供一种用于独立地改变DC偏移消除电路的增益和滚降频率的方法。在一个实施例中，该方法用于独立地操作DC消除电路中的增益控制方案和DC偏移消除策略。

84. 发明授权

US07899431B2 DC offset correction system for a receiver with baseband gain control 有权
标题翻译：具有基带增益控制的接收机的直流偏移校正系统
公开(公告)号：US07899431B2
公开(公告)日：2011-03-01
申请号：US11099138
申请日：2005-04-04
申请人： Mahibur Rahman , Manish N. Shah , Charles L. Sobchak
发明人： Mahibur Rahman , Manish N. Shah , Charles L. Sobchak
IPC分类号： H04B1/26
CPC分类号： H04L25/061 , H03D3/008 , H03G3/3068 , H04B1/30
摘要： A method and apparatus are provided for providing improved radio frequency (RF) receiver signal correction. For RF receiver circuitry (106) having receive path and a warmup period associated therewith and including at least one analog baseband gain control stage (218) having a gain associated therewith, the method includes the step of performing a DC correction calculation operation during the warmup period to derive a DC correction value having a first component and a second component for each of the at least one gain control stage (218). The DC correction calculation step includes the steps of performing a first closed loop correction (460) of a baseband path to derive the first component of the DC correction value and performing a second closed loop correction (462) of the receive path as a function of the (218) gain during the warmup period to derive the second component of the DC correction value. During operation after the warmup period (464 , 466), an open loop correction is performed for instantaneous DC correction as function of the PMA (218) gain and the DC correction value.
摘要翻译：提供了一种用于提供改进的射频（RF）接收机信号校正的方法和装置。对于具有接收路径和与其相关联的预热时段的RF接收器电路（106），并且包括具有与其相关联的增益的至少一个模拟基带增益控制级（218），该方法包括在预热期间执行DC校正计算操作的步骤以产生具有用于所述至少一个增益控制级（218）中的每一个的第一分量和第二分量的DC校正值。 DC校正计算步骤包括以下步骤：执行基带路径的第一闭环校正（460）以导出DC校正值的第一分量，并且执行作为接收路径的函数的接收路径的第二闭环校正（462）（218）在预热期间获得增益，以导出DC校正值的第二分量。在预热时段（464,466）之后的操作期间，作为PMA（218）增益和DC校正值的函数，执行用于瞬时DC校正的开环校正。

85. 发明授权

US07869777B2 Method and system for a second order input intercept point (IIP2) correction 有权
标题翻译：二阶输入截点（IIP2）校正方法和系统
公开(公告)号：US07869777B2
公开(公告)日：2011-01-11
申请号：US12200660
申请日：2008-08-28
申请人： Hooman Darabi
发明人： Hooman Darabi
IPC分类号： G06F3/033
CPC分类号： H04L25/061 , H03D3/008 , H04B1/30 , H04L25/0272 , H04L25/0294 , H04L25/0296
摘要： In RF transceivers, a method and system for a second order input intercept point (IIP2) correction are provided. A DC offset sensor may detect DC offset voltages produced by blocker signals in “I” and “Q” signal component paths in an RF receiver. The DC offset sensor may generate control signals which may be utilized by a first and second injection circuits to generate DC offset currents that compensate for the DC offset voltages in the signal component paths. An injection circuit may utilize current drivers to generate binary weighted currents which may be added together to produce a DC offset current. The polarity of the DC offset current and the selection of which current drivers to use may be determined by the control signals. A calibration voltage may also be utilized to correct or adjust the gain in the injection circuit.
摘要翻译：在RF收发器中，提供了用于二阶输入截点（IIP2）校正的方法和系统。 DC偏移传感器可以检测RF接收机中的“I”和“Q”信号分量路径中的阻塞信号产生的DC偏移电压。 DC偏移传感器可以产生可由第一和第二注入电路利用的控制信号，以产生补偿信号分量路径中的DC偏移电压的DC偏移电流。注入电路可以利用电流驱动器来产生可加在一起以产生DC偏移电流的二进制加权电流。 DC偏移电流的极性和使用哪些电流驱动器的选择可以由控制信号确定。也可以使用校准电压来校正或调整注入电路中的增益。

86. 发明申请

US20100225820A1 INTEGRATED ANALOG VIDEO RECEIVER 审中-公开
标题翻译：集成模拟视频接收器
公开(公告)号：US20100225820A1
公开(公告)日：2010-09-09
申请号：US12784107
申请日：2010-05-20
申请人： Weijie Yun , Samuel Sheng , Dennis G. Yee
发明人： Weijie Yun , Samuel Sheng , Dennis G. Yee
IPC分类号： H04N5/44 , H04N5/50
CPC分类号： H03D3/008 , H03D7/165 , H03D2200/0047 , H04L25/061 , H04L27/063 , H04N5/44 , H04N5/455 , H04N5/50 , H04N5/63
摘要： An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
摘要翻译：在集成电路器件中实现的模拟视频接收器。模拟视频接收机包括用于放大具有期望载波频率的模拟视频信号的放大器，以及混合电路，用于将放大的模拟视频信号与具有基本上等于载波频率的频率的复数正弦曲线混合。

87. 发明申请

US20100003943A1 Harmonic Reject Receiver Architecture and Mixer 有权
标题翻译：谐波抑制接收机架构和混频器
公开(公告)号：US20100003943A1
公开(公告)日：2010-01-07
申请号：US12432666
申请日：2009-04-29
申请人： Kishore Seendripu , Raymond Montemayor , Sheng Ye , Glenn Chang , Curtis Ling
发明人： Kishore Seendripu , Raymond Montemayor , Sheng Ye , Glenn Chang , Curtis Ling
IPC分类号： H04B1/26
CPC分类号： 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
摘要： 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.
摘要翻译：本文公开了采用谐波抑制混频器处理谐波丰富输入信号的接收机架构和方法。所公开的接收机，混频器和方法使得接收机能够实现切换混频器的优点，同时大大降低了混频器对不需要的谐波的响应。谐波混频器可以包括耦合到输入信号的多个混频器。可以从单个本地振荡器输出产生本地振荡器信号的多个相位。每个相都可用于驱动混合器之一的输入。混频器输出可以组合以产生具有谐波抑制的频率转换输出。

88. 发明授权

US07593707B2 Method and system for compensation of DC offset in an RF receiver 有权
标题翻译：用于补偿RF接收机中直流偏移的方法和系统
公开(公告)号：US07593707B2
公开(公告)日：2009-09-22
申请号：US10987977
申请日：2004-11-12
申请人： Brima Ibrahim , Hea Joung Kim , Hooman Darabi
发明人： Brima Ibrahim , Hea Joung Kim , Hooman Darabi
IPC分类号： H04B1/06
CPC分类号： H04L25/061 , H03D3/008 , H03F1/34 , H03F2200/336 , H03F2200/375 , H03G3/001 , H03G3/3068 , H04B1/30 , H04L25/063 , H04L27/0002 , H04L27/364 , H04L27/366
摘要： Aspects of compensating for DC offset in an RF receiver may comprise sampling data from at least one of a plurality of output paths, selecting a sampled data and generating at least one feedback signal based on the selected sampled data. The generated feedback signal may be fed back to at least one of a plurality of input paths, and at least one of the feedback signals may be of an opposite polarity to the selected sampled data. The selected sampled data may be converted to a digital sample, a plurality of the digital samples accumulated, and an average of the plurality of the digital samples calculated. A digital feedback value may be generated based on the average. A phase of the digital feedback value may be adjusted via a derotator, which may utilize the coordinate rotation digital computer (CORDIC) algorithm.
摘要翻译：补偿RF接收机中的DC偏移的方面可以包括从多个输出路径中的至少一个采样数据，选择采样数据并基于所选择的采样数据生成至少一个反馈信号。产生的反馈信号可以反馈到多个输入路径中的至少一个，并且至少一个反馈信号可能与所选择的采样数据具有相反的极性。所选择的采样数据可以被转换成数字样本，多个数字样本被累积，并且计算出多个数字样本的平均值。可以基于平均值生成数字反馈值。数字反馈值的相位可以通过解旋器进行调整，该解旋器可以利用坐标旋转数字计算机（CORDIC）算法。

89. 发明申请

US20090066548A1 METHOD AND SYSTEM FOR COMPENSATION OF DC OFFSET IN AN RF RECEIVER 有权
标题翻译：用于补偿RF接收机中直流偏移的方法和系统
公开(公告)号：US20090066548A1
公开(公告)日：2009-03-12
申请号：US12268957
申请日：2008-11-11
申请人： Brima Ibrahim , Hea Joung Kim , Hooman Darabi
发明人： Brima Ibrahim , Hea Joung Kim , Hooman Darabi
IPC分类号： H03M1/16 , H03M1/66
CPC分类号： H04L25/061 , H03D3/008 , H03F1/34 , H03F2200/336 , H03F2200/375 , H03G3/001 , H03G3/3068 , H04B1/30 , H04L25/063 , H04L27/0002 , H04L27/364 , H04L27/366
摘要： System and method for processing signals are disclosed. The method may include converting, in an RF receiver, one or more analog samples, which are selected from one of a plurality of output paths of the RF receiver, to one or more digital samples. A digital feedback value may be generated based on an average of the one or more converted digital samples. A scaled version of the generated digital feedback value may be converted to an analog value. The converted analog value may be fed back to one or more of a plurality of input paths of the RF receiver. The one or more analog samples may be selected from among a plurality of output analog samples from the plurality of output paths of the RF receiver.
摘要翻译：公开了用于处理信号的系统和方法。该方法可以包括在RF接收机中将从RF接收机的多个输出路径中的一个中选择的一个或多个模拟样本转换成一个或多个数字样本。可以基于一个或多个转换的数字样本的平均值来生成数字反馈值。生成的数字反馈值的缩放版本可以被转换为模拟值。转换的模拟值可以被反馈到RF接收机的多个输入路径中的一个或多个。可以从RF接收机的多个输出路径的多个输出模拟采样中选择一个或多个模拟采样。

90. 发明授权

US07453526B2 Integrated analog video receiver 失效
标题翻译：集成模拟视频接收器
公开(公告)号：US07453526B2
公开(公告)日：2008-11-18
申请号：US11120571
申请日：2005-05-02
申请人： Weijie Yun , Samuel Sheng , Dennis G. Yee
发明人： Weijie Yun , Samuel Sheng , Dennis G. Yee
IPC分类号： H04N5/44 , H04N5/455
CPC分类号： H03D3/008 , H03D7/165 , H03D2200/0047 , H04L25/061 , H04L27/063 , H04N5/44 , H04N5/455 , H04N5/50 , H04N5/63
摘要： An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
摘要翻译：在集成电路器件中实现的模拟视频接收器。模拟视频接收机包括用于放大具有期望载波频率的模拟视频信号的放大器，以及混合电路，用于将放大的模拟视频信号与具有基本上等于载波频率的频率的复数正弦曲线混合。

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