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公开(公告)号：US06970681B2
公开(公告)日：2005-11-29
申请号：US09993801
申请日：2001-11-14
Applicant: Hooman Darabi , Brima Ibrahim , Ahmadreza Rofougaran
Inventor： Hooman Darabi , Brima Ibrahim , Ahmadreza Rofougaran
CPC classification number: H04B1/0057 , H04B1/406
Abstract: An integrated multimode radio includes a multimode receiver and a multimode transmitter. The multimode receiver includes a shared receiver front-end, a receiver multiplexor, and a plurality of receiver IF stages. The multimode transmitter includes a shared transmitter front-end, a transmitter multiplexor, and a plurality of transmitter IF stages.
Abstract translation: 集成的多模式无线电设备包括多模接收机和多模发射机。 多模接收机包括共享接收机前端，接收机多路复用器和多个接收机IF级。 多模发射机包括共享发射机前端，发射机多路复用器和多个发射机IF级。
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公开(公告)号：US06968019B2
公开(公告)日：2005-11-22
申请号：US09960536
申请日：2001-09-21
Applicant: Hooman Darabi , Shahla Khorram , Maryam Rofougaran
Inventor： Hooman Darabi , Shahla Khorram , Maryam Rofougaran
CPC classification number: H04L25/062 , H04L27/142 , H04L27/1525 , H04L2027/0016 , H04L2027/0024
Abstract: In one embodiment, the present invention is a low-power, and high performance receiver including an IF demodulator for high data rate, frequency modulated systems, such as Bluetooth. The IF demodulator is implemented in analog domain for simplicity and lower power consumption and operates at an IF frequency. An IF demodulator comprises: a first IF differentiator for differentiating an I signal; a second IF differentiator for differentiating a Q signal; a cross-coupled multiplier for multiplying the differentiated I signal with the Q signal and multiplying the differentiated Q signal with the I signal to extract frequency information from the I signal and the Q signal; and a slicer for converting the frequency information to digital data.
Abstract translation: 在一个实施例中，本发明是一种低功率，高性能的接收机，包括用于高数据速率的IF解调器，诸如蓝牙的调频系统。 IF解调器在模拟域中实现，以简化和降低功耗，并以IF频率工作。 一个IF解调器包括：用于区分I信号的第一IF微分器; 用于区分Q信号的第二IF微分器; 交叉耦合乘法器，用于将微分I信号与Q信号相乘，并将微分Q信号与I信号相乘，以从I信号和Q信号提取频率信息; 以及用于将频率信息转换为数字数据的限幅器。
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公开(公告)号：US20050130615A1
公开(公告)日：2005-06-16
申请号：US11043326
申请日：2005-01-26
Applicant: Hooman Darabi
Inventor： Hooman Darabi
CPC classification number: H03G3/3052 , H04B1/406
Abstract: A method and apparatus for dynamically controlling a programmable gain amplifier (PGA) to provide a plurality of gain steps thereby providing automatic gain control (AGC) in a receiver intermediate frequency (IF) stage comprising a succession of operational amplifiers wherein at least one is for providing fine gain control and wherein the gain of each fine gain amplifier is controlled by the resistance ratios of a plurality of selectively biased MOSFETs coupled at an input stage and in a feedback loop between the inputs and outputs of each amplifier. The gain is selected by comparing the peak amplitude of a signal to a pair of high and low thresholds. In one embodiment of the invention, three coarse amplifiers are provided, each having a gain of either 0 dB or 12 dB based on the value of a two-state signal provided to each amplifier gain control input. A single fine gain amplifier has a gain of 0 dB, 3 dB, 6 dB or 9 dB based on the binary value of the two-bit signal provided to the amplifier. The combination of three coarse gain amplifiers and one fine gain amplifier provides for a total gain of 45 dB in 3 dB steps in the described embodiment of the invention. The output of the gain control circuitry also is fed into an inverter. The inverter output may be used as a received signal strength indicator for a desired signal.
Abstract translation: 一种用于动态地控制可编程增益放大器（PGA）以提供多个增益步骤的方法和装置，从而在包括一系列运算放大器的接收器中频（IF）级中提供自动增益控制（AGC），其中至少一个用于 提供精细增益控制，并且其中每个精细增益放大器的增益由在输入级耦合的多个选择性偏置的MOSFET和每个放大器的输入和输出之间的反馈环路中的电阻比来控制。 通过将信号的峰值幅度与一对高和低阈值进行比较来选择增益。 在本发明的一个实施例中，提供了三个粗放大器，每个粗放大器基于提供给每个放大器增益控制输入的两状态信号的值，分别具有0dB或12dB的增益。 基于提供给放大器的2位信号的二进制值，单个细增益放大器的增益为0dB，3dB，6dB或9dB。 在本发明的所描述的实施例中，三个粗增益放大器和一个精细增益放大器的组合以3dB的步长提供45dB的总增益。 增益控制电路的输出也被馈送到逆变器。 逆变器输出可以用作所需信号的接收信号强度指示符。
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公开(公告)号：US09215023B2
公开(公告)日：2015-12-15
申请号：US13336325
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
CPC classification number: H04J1/00 , H04J4/00 , H04L7/0008
Abstract: A portable computing device includes a radio frequency (RF) wired link, a data wired link, a core module, a plurality of multi-mode RF units, and a plurality of data modules. The core module is operable to communicate control information with one or more of the plurality of multi-mode RF units in a first frequency band via the RF wired link. The core module is further operable to communicate data of a wireless communication with one or more of the plurality of multi-mode RF units in a second frequency band via the RF wired link. The core module is further operable to communicate clock information to the plurality of multi-mode RF units in a third frequency band via the RF wired link.
Abstract translation: 便携式计算设备包括射频（RF）有线链路，数据有线链路，核心模块，多个多模RF单元和多个数据模块。 核心模块可操作以经由RF有线链路在第一频带中与多个多模RF单元中的一个或多个通信控制信息。 核心模块还可操作以经由RF有线链路在第二频带中传送与多个多模RF单元中的一个或多个的无线通信的数据。 核心模块还可操作以经由RF有线链路将时钟信息传送到第三频带中的多个多模RF单元。
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55.发明授权Method and apparatus for adaptive cancellation of distortion and phase noise 有权用于自适应消除失真和相位噪声的方法和装置公开(公告)号：US09191049B2
公开(公告)日：2015-11-17
申请号：US13470123
申请日：2012-05-11
Applicant: Mohyee Mikhemar , Hooman Darabi
Inventor： Mohyee Mikhemar , Hooman Darabi
CPC classification number: H04B1/123
Abstract: An adaptive cancellation circuit and method are provided. The circuit includes a main path and an auxiliary path. The main path includes a first amplifier configured to output a first amplified signal to a first mixer. The main path is configured to output a first signal comprising a wanted signal component and a distortion component. The auxiliary path includes a second amplifier configured to output a second amplified signal to a second mixer. The second mixer is connected to a filter configured to remove the wanted signal component. The auxiliary path is configured to output a second signal including the distortion component.
Abstract translation: 提供自适应消除电路和方法。 电路包括主路径和辅助路径。 主路径包括被配置为将第一放大信号输出到第一混频器的第一放大器。 主路径被配置为输出包括有用信号分量和失真分量的第一信号。 辅助路径包括被配置为将第二放大信号输出到第二混频器的第二放大器。 第二混频器连接到配置成去除所需信号分量的滤波器。 辅助路径被配置为输出包括失真分量的第二信号。
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Patent Agency Ranking
公开(公告)号：US09031515B2
公开(公告)日：2015-05-12
申请号：US13152560
申请日：2011-06-03
Applicant: Mohyee Mikhemar , Hooman Darabi
Inventor： Mohyee Mikhemar , Hooman Darabi
CPC classification number: H03H7/46 , H03D2200/0074 , H03F3/195 , H03F2200/294 , H03F2200/534 , H03H7/40 , H03H19/008 , H03H2011/0494
Abstract: A transceiver includes a local oscillation module, a transmitter section, and a receiver section. The local oscillation module is operable to generate a transmit local oscillation and a receive oscillation. The transmitter section includes a transmit mixing module and a transmit weaved connection that is operable to high frequency filter the transmit location oscillation. The transmit mixing module mixes the filtered transmit location oscillation with a transmit signal to produce an up-converted signal. The receiver section includes a receive mixing module and a receive weaved connection that is operable to high frequency filter the receive location oscillation. The receive mixing module mixes the filtered receive location oscillation with an RF received signal to produce a down-converted signal.
Abstract translation: 收发机包括本地振荡模块，发射机部分和接收机部分。 本地振荡模块可操作以产生发射本地振荡和接收振荡。 发射机部分包括发射混合模块和可操作以对发射位置振荡进行高频滤波的发射编织连接。 发射混合模块将滤波的发射位置振荡与发射信号混合，以产生上变频信号。 接收器部分包括接收混合模块和接收编织连接，其可操作以对接收位置振荡进行高频滤波。 接收混合模块将经滤波的接收位置振荡与RF接收信号混合以产生下变频信号。
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公开(公告)号：US08903340B2
公开(公告)日：2014-12-02
申请号：US13169699
申请日：2011-06-27
Applicant: Yuyu Chang , Hooman Darabi
Inventor： Yuyu Chang , Hooman Darabi
CPC classification number: H04B1/109 , H03G3/3052 , H03G3/345 , H03G11/02
Abstract: Embodiments of a radio frequency (RF) receiver implementing one or more forms of protection to protect devices of the RF receiver from in-band interferers is provided. The RF receiver includes an integrated circuit terminal configured to couple a RF signal received at an antenna to a RF signal path, and a low noise amplifier (LNA) coupled to the RF signal path and configured to amplify the RF signal to provide an amplified RF signal. To protect the LNA from in-band interferers, the RF receiver can further include one or more clamping circuits and/or an over-voltage detector to determine if a peak of the RF signal exceeds an acceptable level.
Abstract translation: 提供了实现一种或多种形式的保护的射频（RF）接收机的实施例，以保护RF接收机的设备免受带内干扰。 RF接收机包括被配置为将在天线处接收的RF信号耦合到RF信号路径的集成电路终端和耦合到RF信号路径的低噪声放大器（LNA），并被配置为放大RF信号以提供放大RF 信号。 为了保护LNA免受带内干扰，RF接收机还可包括一个或多个钳位电路和/或过电压检测器，以确定RF信号的峰值是否超过可接受的电平。
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公开(公告)号：US08884704B2
公开(公告)日：2014-11-11
申请号：US13237571
申请日：2011-09-20
Applicant: Michael Youssef , Ahmad Mirzaei , Hooman Darabi
Inventor： Michael Youssef , Ahmad Mirzaei , Hooman Darabi
CPC classification number: H03L7/099 , H03L7/02 , H03L7/07 , H03L7/087 , H03L2207/05
Abstract: Embodiments of the present invention enable a feedback-based VCO linearization technique. Embodiments include a frequency locked loop formed by feeding back a VCO's output into the VCO's input in negative phase by means of a frequency-to-voltage (F/V) converter. Embodiments enable constant VCO gain over a wide input tuning range and across PVT variations. Further, embodiments can be nested within a PLL, for example, with negligible area and power consumption overhead.
Abstract translation: 本发明的实施例能够实现基于反馈的VCO线性化技术。 实施例包括通过借助于频率 - 电压（F / V）转换器将VCO的输出反馈到VCO的负输入而形成的锁频环路。 实施例能够在宽的输入调谐范围和PVT变化范围内实现恒定的VCO增益。 此外，实施例可以嵌套在PLL内，例如具有可忽略的面积和功耗开销。
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公开(公告)号：US08855593B2
公开(公告)日：2014-10-07
申请号：US13448980
申请日：2012-04-17
Applicant: Ahmad Mirzaei , Mohyee Mikhemar , Hooman Darabi
Inventor： Ahmad Mirzaei , Mohyee Mikhemar , Hooman Darabi
IPC: H04B1/10
CPC classification number: H04B1/525 , H03F1/3241 , H04B1/0475 , H04B2001/0425
Abstract: A circuit includes a local oscillator of a transmitter, the local oscillator to generate a transmitter local oscillator signal. A switch controlled by the transmitter local oscillator signal connects with a baseband impedance element to generate a notch frequency signal. The notch frequency signal is added to a transmitter leakage signal to attenuate the transmitter leakage signal prior to demodulation of a desired receiver signal by a receiver.
Abstract translation: 电路包括发射机的本地振荡器，本地振荡器产生发射机本地振荡器信号。 由发射机本地振荡器信号控制的开关与基带阻抗元件连接以产生陷波频率信号。 陷波频率信号被添加到发射机泄漏信号，以在由接收机解调期望的接收机信号之前衰减发射机泄漏信号。
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公开(公告)号：US08854155B2
公开(公告)日：2014-10-07
申请号：US13419631
申请日：2012-03-14
Applicant: Mohyee Mikhemar , Hooman Darabi
Inventor： Mohyee Mikhemar , Hooman Darabi
IPC: H01P5/12
Abstract: A duplexing system may be used with an electronic device. The duplexing system may include a duplexer connected with an antenna. The duplexing system may include a balancing network. The balancing network may be connected with the duplexer, have an adjustable network impedance, and include an active component. The balancing network may be configured to adjust the network impedance to match an antenna impedance of the antenna.
Abstract translation: 双工系统可以与电子设备一起使用。 双工系统可以包括与天线连接的双工器。 双工系统可以包括平衡网络。 平衡网络可以与双工器连接，具有可调整的网络阻抗，并且包括有源组件。 平衡网络可以被配置为调整网络阻抗以匹配天线的天线阻抗。
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