公开(公告)号：US09088320B2

公开(公告)日：2015-07-21

申请号：US13688609

申请日：2012-11-29

申请人： Khurram Muhammad

发明人： Khurram Muhammad

IPC分类号： H04B1/04 ,  H03F1/32

CPC分类号： H04B1/0475 ,  H03F1/3241 ,  H04B2001/0425

摘要： Aspects of the disclosure provide a transmitter that includes a pre-distortion module and a phase controller. The pre-distortion module is configured to receive a first digital value and generate a first pre-distorted digital value based on the first digital value and a corresponding angle. The first digital value is a combination of an in-phase component and a quadrature component of a signal for transmission. The phase controller is configured to control an amplifier to drive a current according to the first pre-distorted digital value and phase information in relation to the first digital value during a first phase range of a carrier signal determined at least partially based on the angle.

摘要翻译： 本公开的方面提供了包括预失真模块和相位控制器的发射机。 预失真模块被配置为接收第一数字值并且基于第一数字值和相应的角度生成第一预失真数字值。 第一数字值是用于传输的信号的同相分量和正交分量的组合。 相位控制器被配置为在至少部分地基于角度确定的载波信号的第一相位范围内，根据第一预失真数字值和相对于第一数字值的相位信息来控制放大器来驱动电流。

公开(公告)号：US08792831B2

公开(公告)日：2014-07-29

申请号：US13225762

申请日：2011-09-06

申请人： Khurram Muhammad

发明人： Khurram Muhammad

IPC分类号： H04B1/00 ,  H04B7/14

CPC分类号： H04B15/04

摘要： A mobile wireless communications device includes a transceiver comprising a transmitter and a receiver, an auxiliary receiver, and a controller. The transmitter is configured to upconvert a transmit baseband modulated signal and generate an RF modulated signal having a transmit impairment. The auxiliary receiver is configured to downconvert the RF modulated signal and generate a receive baseband modulated signal having the transmit impairment. The auxiliary receiver is selectively configured to operate based on a control signal in a single-mixer mode when the transmitter is selectively configured to operate in a dual-mixer mode, and in the dual-mixer mode when the transmitter is selectively configured to operate in the single-mixer mode. The controller is configured to compare the transmit baseband modulated signal to the transmit impairment to determine an error difference therebetween, and generate the control signal based on the error difference.

摘要翻译： 移动无线通信设备包括收发器，包括发射机和接收机，辅助接收机和控制器。 发射机被配置为上变频发射基带调制信号并产生具有发射损伤的RF调制信号。 辅助接收机被配置为下变频RF调制信号并产生具有发射损伤的接收基带调制信号。 辅助接收机被选择性地配置为当发射机被选择性地配置为以双混频器模式工作时，并且当发射机被选择性地配置为在双混频器模式中操作时，基于单个混频器模式中的控制信号进行操作 单混音模式。 控制器被配置为将发射基带调制信号与发射损伤进行比较以确定它们之间的误差，并且基于误差产生控制信号。

公开(公告)号：US08553802B2

公开(公告)日：2013-10-08

申请号：US13049200

申请日：2011-03-16

申请人： Khurram Muhammad

发明人： Khurram Muhammad

IPC分类号： H04L27/00

CPC分类号： H04L27/363 ,  H03L7/1974 ,  H04L27/2067 ,  H04L2027/0018

摘要： A communications device may include an In-phase (I) power amplifier configured to generate an I amplified signal, a Quadrature (Q) power amplifier configured to generate a Q amplified signal, an I digital-to-analog converter (DAC) configured to generate an I signal, and a Q DAC configured to generate a Q signal. The communications device may also include an I power supply circuit coupled to the I power amplifier and to the I DAC and configured to cause the I power amplifier to modulate an I carrier signal into the I amplified signal based upon the I signal, a Q power supply circuit coupled to the Q power amplifier and to the Q DAC and configured to cause the Q power amplifier to modulate a Q carrier signal into the Q amplified signal based upon the Q signal, and at least one antenna coupled to the I and Q power amplifiers.

摘要翻译： 通信设备可以包括被配置为产生I放大信号的同相（I）功率放大器，被配置为产生Q放大信号的正交（Q）功率放大器，被配置为 产生I信号和配置成产生Q信号的Q DAC。 通信设备还可以包括耦合到I功率放大器和I DAC的I电源电路，并且被配置为使得I功率放大器基于I信号将I载波信号调制成I放大信号，Q功率 电源电路耦合到Q功率放大器和Q DAC，并被配置为使得Q功率放大器基于Q信号将Q载波信号调制到Q放大信号中，并且至少一个天线耦合到I和Q功率 放大器

公开(公告)号：US08462030B2

公开(公告)日：2013-06-11

申请号：US10832531

申请日：2004-04-27

申请人： Khurram Muhammad

发明人： Khurram Muhammad

IPC分类号： H03M3/00

CPC分类号： H03M3/396 ,  H03M3/392 ,  H03M3/43

摘要： The present invention is directed to a programmable loop filter, a method of programming the same and a sigma delta analog-to-digital converter (ADC) incorporating the programmable loop filter or the method. In one embodiment, the programmable loop filter includes: (1) a configurable filter structure containing selectably interconnectable alternative filter elements and (2) a configuration controller coupled to the configurable filter structure and operable to interconnect at least a selected one of the filter elements to determine a transfer characteristic of the configurable filter structure and set an operating condition of the sigma delta ADC.

摘要翻译： 本发明涉及一种可编程环路滤波器，其编程方法以及结合有可编程环路滤波器或该方法的Σ-Δ模数转换器（ADC）。 在一个实施例中，可编程环路滤波器包括：（1）包含可选择地互连的替代滤波器元件的可配置滤波器结构，以及（2）耦合到可配置滤波器结构并且可操作以将至少一个所选滤波器元件互连到 确定可配置滤波器结构的传输特性并设置Σ-ΔADC的工作状态。

公开(公告)号：US08391806B2

公开(公告)日：2013-03-05

申请号：US12984170

申请日：2011-01-04

申请人： Khurram Muhammad

发明人： Khurram Muhammad

IPC分类号： H04B1/02 ,  H04K3/00

CPC分类号： H04B1/0458

摘要： A mobile wireless communications device includes a portable housing, a transmitter carried by the portable housing and configured to modulate an input signal, and an adjustable impedance matching network coupled downstream from the transmitter. An antenna is coupled downstream from the adjustable impedance matching network, and a non-directional coupler is coupled between the adjustable impedance matching network and the antenna. A feedback receiver is coupled to the non-directional coupler to generate a feedback signal. A controller is configured to control the adjustable impedance matching network based upon the input signal and the feedback signal.

摘要翻译： 移动无线通信设备包括便携式外壳，由便携式外壳承载并被配置为调制输入信号的发射机以及耦合到发射机下游的可调阻抗匹配网络。 天线被耦合在可调阻抗匹配网络的下游，并且非定向耦合器耦合在可调阻抗匹配网络和天线之间。 反馈接收器耦合到非定向耦合器以产生反馈信号。 控制器被配置为基于输入信号和反馈信号来控制可调阻抗匹配网络。

公开(公告)号：US20120236965A1

公开(公告)日：2012-09-20

申请号：US13049272

申请日：2011-03-16

申请人： Khurram Muhammad

发明人： Khurram Muhammad

IPC分类号： H04L27/36

CPC分类号： H04L27/361 ,  H04L27/2032 ,  H04L27/2601

摘要： A communications device may include In-phase (I) power amplifiers configured to generate I amplified signals, Quadrature (Q) power amplifiers configured to generate Q amplified signals, an I controller coupled to the I power amplifiers and configured to selectively enable some of the I power amplifiers, and a Q controller coupled to the Q power amplifiers and configured to selectively enable some of the Q power amplifiers. The communications device may also include a power combiner configured to combine the I amplified signals and the Q amplified signals in a combined amplified signal, and an antenna coupled to the power combiner.

摘要翻译： 通信设备可以包括配置成产生I放大信号的同相（I）功率放大器，被配置为产生Q放大信号的正交（Q）功率放大器，耦合到I功率放大器的I控制器，并被配置为选择性地使能 I功率放大器和耦合到Q功率放大器的Q控制器，并被配置为选择性地使能一些Q功率放大器。 通信设备还可以包括功率组合器，其被配置为组合放大信号中的I放大信号和组合放大信号中的Q放大信号，以及耦合到功率组合器的天线。

公开(公告)号：US08213555B2

公开(公告)日：2012-07-03

申请号：US12397994

申请日：2009-03-04

申请人： Imtinan Elahi ,  Khurram Muhammad

发明人： Imtinan Elahi ,  Khurram Muhammad

IPC分类号： H03D1/04

CPC分类号： H03D3/008 ,  H04B1/30

摘要： Methods, apparatus, and articles of manufacture are described for improving distortion performance and for direct current offset cancellation in receivers. In one example, a method of improving distortion in a receiver includes determining a direct current (DC) amplitude of an offset signal, generating the offset signal, and providing the offset signal to an output of a mixer to improve the distortion performance of the mixer.

摘要翻译： 描述了用于改善接收机中的失真性能和直流偏移消除的方法，装置和制品。 在一个示例中，改善接收机中的失真的方法包括确定偏移信号的直流（DC）幅度，产生偏移信号，以及将偏移信号提供给混频器的输出，以改善混频器的失真性能 。

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。

公开(公告)号：US07885625B2

公开(公告)日：2011-02-08

申请号：US11717563

申请日：2007-03-13

申请人： Khurram Muhammad ,  Meng-Chang Lee ,  Dirk Leipold

发明人： Khurram Muhammad ,  Meng-Chang Lee ,  Dirk Leipold

IPC分类号： H04B1/06 ,  H04B7/00 ,  H04L27/08

CPC分类号： H04B1/28 ,  H03M1/183 ,  H04B1/0007

摘要： Methods and apparatus to perform radio frequency (RF) analog-to-digital conversion are described. According to one example, a receiver includes an amplifier to amplify received analog RF signals and a mixer-free circuit for converting the received analog RF signals to digital signals.

摘要翻译： 描述了执行射频（RF）模数转换的方法和装置。 根据一个示例，接收机包括用于放大接收到的模拟RF信号的放大器和用于将所接收的模拟RF信号转换为数字信号的无混频器电路。

公开(公告)号：US07623838B2

公开(公告)日：2009-11-24

申请号：US11028995

申请日：2005-01-03

申请人： Robert Staszewski ,  Khurram Muhammad ,  Yo-Chuol Ho ,  Dirk Leipold

发明人： Robert Staszewski ,  Khurram Muhammad ,  Yo-Chuol Ho ,  Dirk Leipold

IPC分类号： H04B1/26

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。