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1. 发明授权

US07519135B2 Direct radio frequency (RF) sampling with recursive filtering method 有权
标题翻译：直接射频（RF）采样采用递归滤波法
公开(公告)号：US07519135B2
公开(公告)日：2009-04-14
申请号：US10190867
申请日：2002-07-08
申请人： Robert B. Staszewski , Khurram Muhammad , Kenneth J. Maggio , Dirk Leipold
发明人： Robert B. Staszewski , Khurram Muhammad , Kenneth J. Maggio , Dirk Leipold
IPC分类号： H03K5/01
CPC分类号： H03D7/125 , H04B1/1036
摘要： A radio receiver 2000 with a sampling mixer 1100 for creating a discrete-time sample stream by directly sampling an RF current with history and rotating capacitors 1111 and 1112, wherein the accumulated charge on the rotating capacitors is read-out to produce a sample. The mixer provides immunity to noise glitches by predicting the occurrence of the glitch (or detecting a significant difference between observed and predicted samples) and creating corrected samples for the corrupted samples. These corrected samples can be created with special circuitry 1933 (digital) or in the mixer 1100 (analog).
摘要翻译：具有采样混合器1100的无线电接收机2000，用于通过用历史和旋转电容器1111和1112直接采样RF电流来产生离散时间采样流，其中读出旋转电容器上的累积电荷以产生样本。混合器通过预测毛刺的发生（或检测观察到的和预测的样品之间的显着差异）并为损坏的样品产生校正的样品来提供对噪声毛刺的免疫。这些校正样本可以用专用电路1933（数字）或混合器1100（模拟）来创建。

2. 发明授权

US07003276B2 Subsampling communication receiver architecture with gain control and RSSI generation 有权
标题翻译：采样增益控制和RSSI生成的通信接收机架构
公开(公告)号：US07003276B2
公开(公告)日：2006-02-21
申请号：US10132025
申请日：2002-04-25
申请人： Khurram Muhammad , Dirk Leipold , Kenneth J. Maggio
发明人： Khurram Muhammad , Dirk Leipold , Kenneth J. Maggio
IPC分类号： H04B1/26
CPC分类号： H04B1/0025 , H03H15/00 , H03H19/004 , H04B1/0003 , H04B1/28 , H04L27/24
摘要： A first periodic voltage waveform (20) is downconverted into a second periodic voltage waveform (35, 36). A plurality of temporally distinct samples (SA1, SA2, . . . ) respectively indicative of areas under corresponding fractional-cycles of the first voltage waveform are obtained. The samples are combined to produce the second voltage waveform. The samples can be manipulated to provide gain adjustment to the second voltage waveform. The samples are obtained by charging a sampling capacitance in response to a current waveform that corresponds to the first voltage waveform. The use of different sampling capacitances during respective predetermined time intervals permits the signal strength of the first waveform to be determined from observation of the second waveform.
摘要翻译：第一周期性电压波形（20）被下变频成第二周期性电压波形（35,36）。获得分别表示第一电压波形的相应分数周期下的面积的多个时间上不同的样本（SA 1，SA 2 ...）。将样品组合以产生第二电压波形。可以操作样品以对第二电压波形提供增益调整。通过响应于对应于第一电压波形的电流波形对采样电容进行充电来获得样本。在各个预定时间间隔期间使用不同的采样电容允许通过观察第二波形来确定第一波形的信号强度。

3. 发明申请

US20090196384A1 Direct Radio Frequency (RF) Sampling With Recursive Filtering Method 审中-公开
标题翻译：直接射频（RF）采样递归滤波方法
公开(公告)号：US20090196384A1
公开(公告)日：2009-08-06
申请号：US12334268
申请日：2008-12-12
申请人： Robert B. Staszewski , Khurram Muhammad , Kenneth J. Maggio , Dirk Leipold
发明人： Robert B. Staszewski , Khurram Muhammad , Kenneth J. Maggio , Dirk Leipold
IPC分类号： H03D1/04
CPC分类号： H03D7/125 , H04B1/1036
摘要： A radio receiver 2000 with a sampling mixer 1100 for creating a discrete-time sample stream by directly sampling an RF current with history and rotating capacitors 1111 and 1112, wherein the accumulated charge on the rotating capacitors is read-out to produce a sample. The mixer provides immunity to noise glitches by predicting the occurrence of the glitch (or detecting a significant difference between observed and predicted samples) and creating corrected samples for the corrupted samples. These corrected samples can be created with special circuitry 1933 (digital) or in the mixer 1100 (analog).
摘要翻译：具有采样混合器1100的无线电接收机2000，用于通过用历史和旋转电容器1111和1112直接采样RF电流来产生离散时间采样流，其中读出旋转电容器上的累积电荷以产生样本。混合器通过预测毛刺的发生（或检测观察到的和预测的样品之间的显着差异）并为损坏的样品产生校正的样品来提供对噪声毛刺的免疫。这些校正样本可以用专用电路1933（数字）或混合器1100（模拟）来创建。

4. 发明授权

US07639082B2 System and method for amplifier gain measurement and compensation 有权
标题翻译：放大器增益测量和补偿的系统和方法
公开(公告)号：US07639082B2
公开(公告)日：2009-12-29
申请号：US11847961
申请日：2007-08-30
申请人： Khurram Muhammad , Dirk Leipold , Chandana Fernando
发明人： Khurram Muhammad , Dirk Leipold , Chandana Fernando
IPC分类号： H03F3/04
CPC分类号： H03G3/30 , H03F3/19 , H03F2200/294 , H03F2200/336 , H03F2200/468
摘要： A system and method for amplifier gain measurement and compensation. A method for compensating a signal gain of an amplifier circuit includes determining a desired gain for the amplifier circuit, determining an operating temperature of the amplifier circuit, adjusting a set of signal gains based on the operating temperature to produce a set of adjusted signal gains, determining a desired gain setting based on the desired gain and the set of signal gains, and providing the desired gain setting to the amplifier circuit.
摘要翻译：一种用于放大器增益测量和补偿的系统和方法。用于补偿放大器电路的信号增益的方法包括确定放大器电路的期望增益，确定放大器电路的工作温度，基于工作温度调整一组信号增益以产生一组经调整的信号增益，基于期望的增益和所述一组信号增益确定期望的增益设置，以及向放大器电路提供期望的增益设置。

5. 发明申请

US20080113628A1 Methods and apparatus to provide an auxiliary receive path to support transmitter functions 有权
标题翻译：提供辅助接收路径以支持发射机功能的方法和装置
公开(公告)号：US20080113628A1
公开(公告)日：2008-05-15
申请号：US11595101
申请日：2006-11-09
申请人： Khurram Muhammad , Dirk Leipold
发明人： Khurram Muhammad , Dirk Leipold
IPC分类号： H04B1/40
CPC分类号： H04B1/52
摘要： Methods and apparatus to provide an auxiliary receive path to support transmitter functions are disclosed. An example transceiver includes an antenna and a duplexer coupled to the antenna. A transmitter is coupled to the duplexer to output a transmit signal at a transmit frequency. A receiver is coupled to the duplexer to receive a received signal at a receiver frequency. A signal processor is coupled to the transmitter and receiver. An auxiliary receiver is communicatively coupled to the signal processor to receive the transmit signal output from the transmitter and send an auxiliary receiver signal to the signal processor. The signal processor adjusts the transmit signal based on the auxiliary receiver signal.
摘要翻译：公开了提供辅助接收路径以支持发射机功能的方法和装置。示例收发器包括耦合到天线的天线和双工器。发射机耦合到双工器以以发射频率输出发射信号。接收机耦合到双工器以在接收机频率处接收接收的信号。信号处理器耦合到发射机和接收机。辅助接收器通信地耦合到信号处理器以接收从发射机输出的发射信号，并向辅助接收机信号发送信号处理器。信号处理器根据辅助接收机信号调整发射信号。

6. 发明申请

US20070105522A1 Offset balancer, method of balancing an offset and a wireless receiver employing the balancer and the method 有权
标题翻译：偏移平衡器，平衡偏移的方法和采用平衡器的无线接收器及其方法
公开(公告)号：US20070105522A1
公开(公告)日：2007-05-10
申请号：US11270122
申请日：2005-11-09
申请人： Khurram Muhammad , Dirk Leipold
发明人： Khurram Muhammad , Dirk Leipold
IPC分类号： H04B1/26
CPC分类号： H03D3/008
摘要： The present invention provides an offset balancer for use with a differential mixer employing a wireless reception and an offset quantifier configured to indicate an existing DC offset of the mixer corresponding to an existing second-order intercept point applicable to the wireless reception. In one embodiment, the offset balancer includes an offset adjuster coupled to the offset quantifier and configured to provide an offset adjustment to the existing DC offset based on increasing the existing second-order intercept point.
摘要翻译：本发明提供一种与使用无线接收的差分混频器一起使用的偏移平衡器和配置为指示对应于可应用于无线接收的现有二阶截取点的混频器的现有DC偏移的偏移量化器。在一个实施例中，偏移平衡器包括偏移调整器，该偏移调整器耦合到偏移量化器并且被配置为基于增加现有的二阶截取点来提供对现有DC偏移的偏移调整。

7. 发明申请

US20060135107A1 Removing close-in interferers through a feedback loop 有权
标题翻译：通过反馈回路消除紧密的干扰源
公开(公告)号：US20060135107A1
公开(公告)日：2006-06-22
申请号：US11339386
申请日：2006-01-25
申请人： Robert Staszewski , Khurram Muhammad , Dirk Leipold
发明人： Robert Staszewski , Khurram Muhammad , Dirk Leipold
IPC分类号： H04B1/10
CPC分类号： H04B1/28 , H04B1/1036
摘要： System and method for elimination of close-in interferers through feedback. A preferred embodiment comprises an interferer predictor (for example, interferer predictor 840) coupled to a digital output of a direct RF radio receiver (for example, radio receiver 800). The interferer predictor predicts the presence of interferers and feeds the information back to a sampling unit (for example, sampling unit 805) through a feedback circuit (for example, feedback unit 845) through the use of charge sharing. The interferers are then eliminated in the sampling unit. Additionally, the number and placement of zeroes in a filter in the sampling unit is increased and changed through the implementation of arbitrary-coefficient finite impulse response filters.
摘要翻译：通过反馈消除接近干扰的系统和方法。优选实施例包括耦合到直接RF无线电接收机（例如，无线电接收机800）的数字输出的干扰源预测器（例如，干扰源预测器840）。干扰源预测器预测干扰源的存在，并且通过使用电荷共享通过反馈电路（例如，反馈单元845）将信息反馈给采样单元（例如，采样单元805）。然后在采样单元中消除干扰源。另外，通过执行任意系数有限脉冲响应滤波器来增加和改变采样单元滤波器中的零数和位置。

8. 发明申请

US20050233725A1 Image reject filtering in a direct sampling mixer 审中-公开
标题翻译：直接采样混频器中的图像抑制滤波
公开(公告)号：US20050233725A1
公开(公告)日：2005-10-20
申请号：US10828386
申请日：2004-04-20
申请人： Khurram Muhammad , Robert Staszewski , Dirk Leipold
发明人： Khurram Muhammad , Robert Staszewski , Dirk Leipold
IPC分类号： H03D7/18 , H03H19/00 , H04B1/16 , H04B1/28
CPC分类号： H03D7/18 , H03H19/004 , H03H2007/0192
摘要： Disclosed are methods, circuits and systems for image reject filtering in a multi-tap direct sampling mixer (MTDSM) of an IF or RF system. Disclosed is the use of rotating capacitors among the in-phase and quadrature branches of a signal processing system. The exchange of information among the branches of the I and Q channels is used in the implementation of a complex filter. Embodiments using cascaded multiple stages of the complex filter to provide higher order complex filters are also disclosed.
摘要翻译：公开了用于IF或RF系统的多抽头直接采样混频器（MTDSM）中的图像抑制滤波的方法，电路和系统。公开了在信号处理系统的同相和正交分支中使用旋转电容器。在I和Q通道的分支之间的信息交换被用于实现复杂的过滤器。还公开了使用复合滤波器的级联多级以提供更高阶复数滤波器的实施例。

9. 发明授权

US06734741B2 Frequency synthesizer with digitally-controlled oscillator 有权
公开(公告)号：US06734741B2
公开(公告)日：2004-05-11
申请号：US10006607
申请日：2001-11-30
申请人： Robert B. Staszewski , Dirk Leipold , Khurram Muhammad , Chih-Ming Hung
发明人： Robert B. Staszewski , Dirk Leipold , Khurram Muhammad , Chih-Ming Hung
IPC分类号： H03L700
CPC分类号： H03C3/0975 , H03C3/0941 , H03C3/095 , H03C3/0958 , H03C3/0966 , H03K19/0016 , H03L7/085 , H03L7/087 , H03L7/091 , H03L7/093 , H03L7/099 , H03L7/16 , H03L2207/50 , H04L7/0029
摘要： A transmitter (10) based on a frequency synthesizer includes an LC tank (12) of a digitally controlled oscillator (DCO) with various arrays of capacitors. The LC tank 12 is divided into two major groups that reflect two general operational modes: acquisition and tracking. The first group (process/voltage/temperature and acquisition) approximately sets the desired center frequency of oscillation initially, while the second group (integer and fractional tracking) precisely controls the oscillating frequency during the actual operation. For highly accurate outputs, dynamic element matching (DEM) is used in the integer tracking controller to reduce non-linearities caused by non-uniform capacitor values. Also, a preferred range of the integer tracking capacitor array may be used for modulation after the selected channel has been acquired. A digital sigma-delta modulator circuit (50) drives a capacitor array (14d) in response to the fractional bits of the error word. On mode switches, the accumulated error is recalculated to a phase restart value to prevent perturbations.

10. 发明授权

US08027657B2 Sampling mixer with asynchronous clock and signal domains 有权
标题翻译：具有异步时钟和信号域的采样混频器
公开(公告)号：US08027657B2
公开(公告)日：2011-09-27
申请号：US10121761
申请日：2002-04-12
申请人： Robert B. Staszewski , Khurram Muhammad , Yo-Chuol Ho , Dirk Leipold
发明人： Robert B. Staszewski , Khurram Muhammad , Yo-Chuol Ho , Dirk Leipold
IPC分类号： H04B1/26 , H04L27/00
CPC分类号： H03D7/125 , H04B1/1036
摘要： A mixer 1100 with a plurality of signal paths typically requires separate clock generating hardware for each signal path. However, the redundancy of having multiple clock generating hardware significantly increases power consumption and integrated circuit area when the mixer 1100 is integrated into silicon. A method and apparatus 1125 containing a circuit for generating a set of clock signals that can be shared by the different signal paths is presented. Advantage is taken of the significant capacitance difference between different sampling capacitors in the mixer and the superposition property.
摘要翻译：具有多个信号路径的混频器1100通常需要用于每个信号路径的单独的时钟产生硬件。然而，当混合器1100集成到硅中时，具有多个时钟产生硬件的冗余显着地增加了功耗和集成电路面积。提出了一种包含用于生成可由不同信号路径共享的一组时钟信号的电路的方法和装置1125。利用混频器中不同采样电容器之间的显着电容差和叠加特性。

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