公开(公告)号：US08218693B2

公开(公告)日：2012-07-10

申请号：US11371850

申请日：2006-03-09

Applicant: Hooman Darabi

Inventor： Hooman Darabi

IPC: H04L27/08

CPC classification number: H04B1/40 ,  H03G3/3084

Abstract: Various embodiments are disclosed relating to a gain control for a wireless receiver. In an example embodiment, a wireless receiver is provided that may include an analog gain circuit adapted to provide a variable analog gain on a received input signal, an analog to digital converter (ADC) having an input coupled to an output of the analog gain circuit, and a digital gain circuit having an input coupled to an output of the ADC and adapted to provide a variable digital gain on a received digital signal from the ADC. According to an example embodiment, the wireless transceiver may decrease a gain of the analog gain circuit while maintaining a gain of the digital gain circuit substantially constant for a receiver input signal level that increases from a first input signal level up to at least a first test signal level. In addition, in an example embodiment, the wireless receiver may also decrease a gain of the analog gain circuit while maintaining a gain of the digital gain circuit substantially constant for a signal level of the input signal that increases from a first input signal level up to at least a blocker test signal level.

Abstract translation: 公开了关于无线接收机的增益控制的各种实施例。 在示例实施例中，提供了一种无线接收器，其可以包括适于在接收的输入信号上提供可变模拟增益的模拟增益电路，具有耦合到模拟增益电路的输出的输入的模数转换器（ADC） 以及数字增益电路，其具有耦合到ADC的输出的输入，并且适于在来自ADC的接收数字信号上提供可变数字增益。 根据示例实施例，无线收发器可以降低模拟增益电路的增益，同时保持数字增益电路的增益对于从第一输入信号电平增加到至少第一测试的接收机输入信号电平基本上是恒定的 信号电平。 此外，在示例性实施例中，无线接收机还可以降低模拟增益电路的增益，同时保持数字增益电路的增益对于从第一输入信号电平增加到的输入信号的信号电平基本恒定，直到 至少阻塞测试信号电平。

公开(公告)号：US20120092284A1

公开(公告)日：2012-04-19

申请号：US13336425

申请日：2011-12-23

Applicant: Ahmadreza (Reza) Rofougaran ,  Maryam Rofougaran ,  Brima B. Ibrahim ,  Hooman Darabi

Inventor： Ahmadreza (Reza) Rofougaran ,  Maryam Rofougaran ,  Brima B. Ibrahim ,  Hooman Darabi

IPC: G06F3/041

CPC classification number: G06F3/017 ,  G06F3/041 ,  G06F2203/04108 ,  H04B1/00 ,  H04M1/725

Abstract: A portable computing device includes a three-dimensional (3D) touch screen and a core module. The 3D touch screen includes a two-dimensional (2D) touch screen section and a plurality of radio frequency (RF) radar modules. The core module is operable to determine whether the 3D touch screen is in a 3D mode or a 2D mode. When the 3D touch screen is in the 3D mode, the core module is further operable to receive one or more radar signals via one or more of the plurality of RF radar modules and interpret the one or more radar signals to produce a 3D input signal.

Abstract translation: 便携式计算设备包括三维（3D）触摸屏和核心模块。 3D触摸屏包括二维（2D）触摸屏部分和多个射频（RF）雷达模块。 核心模块可操作以确定3D触摸屏是3D模式还是2D模式。 当3D触摸屏处于3D模式时，核心模块还可操作以经由多个RF雷达模块中的一个或多个接收一个或多个雷达信号，并且解释一个或多个雷达信号以产生3D输入信号。

公开(公告)号：US20120077446A1

公开(公告)日：2012-03-29

申请号：US12924353

申请日：2010-09-24

Applicant: Masoud Kahrizi ,  Zhimin Zhou ,  Hooman Darabi

Inventor： Masoud Kahrizi ,  Zhimin Zhou ,  Hooman Darabi

IPC: H04W24/00

CPC classification number: H04B17/0027 ,  H04B17/13 ,  H04B17/19

Abstract: A self-testing transceiver comprises a receiver, and a transmitter including a power amplifier (PA) and a plurality of transmitter pre-PA stages. The plurality of transmitter pre-PA stages are configured to generate a communication signal at a receive frequency of the transceiver and the receiver is configured to process another communication signal at a transmit frequency of the transceiver, thereby enabling transceiver self-testing. A method for use by a transceiver for self-testing comprises generating a first communication signal at a transmit frequency of the transceiver by a transmitter of the transceiver, processing the first communication signal by a receiver of the transceiver, generating a second communication signal at a receive frequency of the transceiver by the transmitter, and processing the second communication signal by the receiver. The described generating and processing of the first and second communication signals resulting in self-testing by the transceiver.

Abstract translation: 自检收发器包括接收器和包括功率放大器（PA）和多个发射器预PA级的发射器。 多个发射器预PA级被配置为以收发器的接收频率生成通信信号，并且接收器被配置为以收发器的发射频率处理另一通信信号，由此使能收发器自检。 收发信机用于自检的方法包括：通过收发信机的发射机在收发信机的发射频率下生成第一通信信号，由收发信机的接收机处理第一通信信号，产生第二通信信号 由发射机接收收发信机的频率，并由接收机处理第二通信信号。 所描述的第一和第二通信信号的产生和处理导致收发器的自检。

公开(公告)号：US08145146B2

公开(公告)日：2012-03-27

申请号：US12789470

申请日：2010-05-28

Applicant: Mohammad Nariman ,  Alireza Zolfaghari ,  Hooman Darabi

Inventor： Mohammad Nariman ,  Alireza Zolfaghari ,  Hooman Darabi

IPC: H04B1/02 ,  H04B17/00

CPC classification number: H04B1/0483

Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.

Abstract translation: 射频（RF）发射机前端包括数模转换模块和功率放大器模块。 当第一模式有效时，数模转换模块被耦合以将幅度信息转换为模拟幅度调整信号，并且当第二模式被激活时被耦合以将功率电平信息转换为模拟功率电平信号。 功率放大器模块被耦合以根据模拟幅度调整信号放大第一相位调制RF信号，以在第一模式有效时产生第一出站RF信号，并且被耦合以根据模拟功率电平放大第二相位调制RF信号 当第二模式有效时产生第二出站RF信号的信号。

公开(公告)号：US20120052824A1

公开(公告)日：2012-03-01

申请号：US12807210

申请日：2010-08-30

Applicant: Ahmad Mirzaei ,  Hooman Darabi

Inventor： Ahmad Mirzaei ,  Hooman Darabi

IPC: H01Q11/12 ,  H01F27/42

CPC classification number: H01F27/42 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/537

Abstract: According to one embodiment, a variable gain control transformer comprises a primary winding connected to differential inputs of the variable gain control transformer, a secondary winding for providing a single ended output to a load, and an output control circuit coupled to the secondary winding, the output control circuit configured to provide up to approximately 12 dB of gain control. Variable gain control may be achieved using first and second variable resistors of the output control circuit, wherein the first and second variable resistors are implemented by respective first and second pluralities of source-drain resistances produced by respective corresponding first and second pluralities of selectable field-effect transistors (FETs). In one embodiment, the variable gain control transformer further comprises a variable capacitance tuning circuit coupled between the differential inputs, the variable capacitance tuning circuit implemented using a plurality of selectable fixed capacitance unit cells.

Abstract translation: 根据一个实施例，可变增益控制变压器包括连接到可变增益控制变压器的差分输入的初级绕组，用于向负载提供单端输出的次级绕组和耦合到次级绕组的输出控制电路， 输出控制电路被配置为提供高达约12dB的增益控制。 可以通过输出控制电路的第一和第二可变电阻器实现可变增益控制，其中第一和第二可变电阻器由相应的第一和第二多个可选择的场 - 效应晶体管（FET）。 在一个实施例中，可变增益控制变压器还包括耦合在差分输入之间的可变电容调谐电路，使用多个可选择的固定电容单位单元实现的可变电容调谐电路。

公开(公告)号：US08126093B2

公开(公告)日：2012-02-28

申请号：US10976575

申请日：2004-10-29

Applicant: Hooman Darabi

Inventor： Hooman Darabi

IPC: H04L27/08

CPC classification number: H04L27/0002 ,  H03D3/008 ,  H03F1/30 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/447 ,  H03G3/3042 ,  H03G3/3052 ,  H04L25/061 ,  H04L27/22 ,  H04L27/3809

Abstract: Certain embodiments of the invention may be found in a method and system for process, voltage, and temperature (PVT) correction. The method may comprise first determining an input voltage of a transistor coupled in an inphase (I) path of a receiver and an input voltage of a transistor coupled in a quadrature (Q) path of said receiver. An amplifier gain setting may be determined from a lookup table based on at least one of a plurality of parameters related to the first determining. A gain of at least one amplifier in the receiver may be adjusted based on the amplifier gain setting determined from the lookup table.

Abstract translation: 可以在用于过程，电压和温度（PVT）校正的方法和系统中找到本发明的某些实施例。 该方法可以包括首先确定耦合在接收器的同相（I）路径中的晶体管的输入电压和耦合在所述接收器的正交（Q）路径中的晶体管的输入电压。 可以基于与第一确定相关的多个参数中的至少一个来从查找表确定放大器增益设置。 可以基于从查找表确定的放大器增益设置来调整接收器中的至少一个放大器的增益。

公开(公告)号：US20120020389A1

公开(公告)日：2012-01-26

申请号：US13071295

申请日：2011-03-24

Applicant: Mohyee Mikhemar ,  Hooman Darabi

Inventor： Mohyee Mikhemar ,  Hooman Darabi

IPC: H04L27/06

CPC classification number: H04L27/0014 ,  H04L2025/03617 ,  H04L2027/0024

Abstract: A technique to remove second order and third order nonlinearity distortions caused by a blocker signal at an input of a radio receiver. An envelope detector is utilized at an input of the RF front-end of the receiver to obtain a magnitude of the overall signal. The output of the envelope detector is then processed at baseband to estimate coefficients that relate to the distortion. Once the coefficients are obtained, the coefficients are applied at an I/Q imbalance correction stage to also correct for the distortion by cancelling the distortion from the received signal.

Abstract translation: 一种在无线电接收机的输入端去除由阻塞信号引起的二阶和三阶非线性失真的技术。 在接收机的RF前端的输入处使用包络检测器以获得整体信号的幅度。 然后在基带处理包络检测器的输出以估计与失真相关的系数。 一旦获得了系数，则在I / Q不平衡校正级施加系数，以通过从接收信号中消除失真来校正失真。

公开(公告)号：US08073044B2

公开(公告)日：2011-12-06

申请号：US11968221

申请日：2008-01-02

Applicant: Alireza Zolfaghari ,  Hooman Darabi ,  Henrik T. Jensen

Inventor： Alireza Zolfaghari ,  Hooman Darabi ,  Henrik T. Jensen

IPC: H03H7/30 ,  H04L7/12 ,  H04L25/03

CPC classification number: H04L27/361 ,  H03F1/3241 ,  H04B1/0483 ,  H04B2001/0425 ,  H04L25/03343

Abstract: A calibration circuit measures the variation in a filter resistor within the analog domain of the envelope path of a polar transmitter and produces a digital value representative of that variation. A digital processor determines a digital control signal from the digital value that is used to compensate, in the digital domain of the envelope path, for the variation in the filter resistor in the analog domain.

Abstract translation: 校准电路测量极性发射器的包络路径的模拟域内的滤波电阻的变化，并产生代表该变化的数字值。 数字处理器根据数字值确定数字控制信号，该数字值用于在包络路径的数字域中补偿模拟域中的滤波电阻的变化。

公开(公告)号：US08064967B2

公开(公告)日：2011-11-22

申请号：US12056448

申请日：2008-03-27

Applicant: Ahmadreza (Reza) Rofougaran ,  Maryam Rofougaran ,  Hooman Darabi ,  Vafa James Rakshani ,  Claude G. Hayek

Inventor： Ahmadreza (Reza) Rofougaran ,  Maryam Rofougaran ,  Hooman Darabi ,  Vafa James Rakshani ,  Claude G. Hayek

IPC: H04B1/38

CPC classification number: G06F1/3203 ,  G06F1/3237 ,  G06F1/324 ,  G06F1/3287 ,  H04B1/38 ,  Y02D10/126 ,  Y02D10/128 ,  Y02D10/171

Abstract: A radio frequency (RF) integrated circuit (IC) operable to support wireless communications is provided. In one embodiment, the RF IC includes an advanced high-performance (AHB) bus matrix, a microprocessor core coupled to the AHB bus matrix, a plurality of processing modules wherein each processing module is operable to support one or more functions of the RF IC, and a plurality of power islands. Each power island is associated with one or more functions of the RF IC. This arrangement allows power islands coupled to the processing modules associated with the one or more functions associated with the power island to supply power for the processing modules associated with the one or more functions associated with the power island. Power from the power island(s) to the processing module(s) may be reduced or secured when the one or more functions associated with the power island is not required.

Abstract translation: 提供可操作以支持无线通信的射频（RF）集成电路（IC）。 在一个实施例中，RF IC包括先进的高性能（AHB）总线矩阵，耦合到AHB总线矩阵的微处理器核心，多个处理模块，其中每个处理模块可操作以支持RF IC的一个或多个功能 ，以及多个功率岛。 每个功率岛与RF IC的一个或多个功能相关联。 这种布置允许耦合到与功率岛相关联的一个或多个功能相关联的处理模块的功率岛为与功率岛相关联的一个或多个功能相关联的处理模块提供功率。 当不需要与电力岛相关联的一个或多个功能时，可以减少或保护从功率岛到处理模块的电力。

公开(公告)号：US08049302B2

公开(公告)日：2011-11-01

申请号：US11411648

申请日：2006-04-26

Applicant: Hooman Darabi ,  Oiang Li ,  Bo Zhang

Inventor： Hooman Darabi ,  Oiang Li ,  Bo Zhang

IPC: H01L21/02

CPC classification number: H01L27/0805 ,  H01L23/5223 ,  H01L28/87 ,  H01L29/93 ,  H01L29/94 ,  H01L2924/0002 ,  H01L2924/00

Abstract: At least a first capacitor is formed on a substrate and connected to a first differential node of a differential circuit, and the first capacitor may be variable in capacitance. A second capacitor is formed on the substrate and connected to a second differential node of the differential circuit, and the second capacitor also may be variable. A third capacitor is connected between the first differential node and the second differential node, and is formed at least partially above the first capacitor. In this way, a size of the first capacitor and/or the second capacitor may be reduced on the substrate, and capacitances of the first and/or second capacitor(s) may be adjusted in response to a variable characteristic of one or more circuit components of the differential circuit.

Abstract translation: 至少第一电容器形成在衬底上并连接到差分电路的第一差分节点，并且第一电容器可以是可变电容的。 第二电容器形成在衬底上并连接到差分电路的第二差分节点，并且第二电容器也可以是可变的。 第三电容器连接在第一差分节点和第二差分节点之间，并且至少部分地形成在第一电容器的上方。 以这种方式，可以在衬底上减小第一电容器和/或第二电容器的尺寸，并且可以响应于一个或多个电路的可变特性来调整第一和/或第二电容器的电容 差分电路的组件。