公开(公告)号：US08483642B2

公开(公告)日：2013-07-09

申请号：US13070980

申请日：2011-03-24

Applicant: Ahmad Mirzaei ,  Hooman Darabi

Inventor： Ahmad Mirzaei ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04L5/1461 ,  H03F1/56 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/537 ,  H03H7/40 ,  H04B1/0458 ,  H04B1/10 ,  H04B1/18 ,  H04B1/525 ,  H04B1/581

Abstract: A SAW-less receiver includes a front end module (FEM) interface module, an RF to IF section, and an IF to baseband section. The RF to IF section includes a frequency translated bandpass filter (FTBPF), an LNA, and a mixing section. The FTBPF includes a switching network and a complex baseband filter having an offset baseband filter response. The switching network is operable to frequency translate the offset baseband filter response to an RF frequency response such that the FTBPF filters the inbound RF signal by passing, substantially unattenuated, a desired RF signal component and by attenuating an image signal component and/or an undesired signal component. The LNA amplifies the filtered inbound RF signal and the mixing section mixes the amplified inbound RF signal with a local oscillation to produce an inbound IF signal. The IF to baseband section converts the inbound IF signal into an inbound symbol stream(s).

Abstract translation: 无SAW接收器包括前端模块（FEM）接口模块，RF至IF部分和IF到基带部分。 RF至IF部分包括频率转换带通滤波器（FTBPF），LNA和混频部分。 FTBPF包括交换网络和具有偏移基带滤波器响应的复基带滤波器。 切换网络可操作以将偏移基带滤波器响应频率转换为RF频率响应，使得FTBPF通过使基本上未衰减的期望RF信号分量通过，并且通过衰减图像信号分量和/或不期望的 信号分量。 LNA放大滤波的入站RF信号，混合部分将放大的入站RF信号与本地振荡混频，以产生入站IF信号。 IF到基带部分将入站IF信号转换成入站符号流。

公开(公告)号：US08467473B2

公开(公告)日：2013-06-18

申请号：US11395907

申请日：2006-03-31

Applicant: Alireza Zolfaghari ,  Henrik Tholstrup Jensen ,  Hooman Darabi

Inventor： Alireza Zolfaghari ,  Henrik Tholstrup Jensen ,  Hooman Darabi

IPC: H04K1/02 ,  H04L27/00 ,  H03M7/00

CPC classification number: H04B1/406 ,  H03F3/24 ,  H04B2001/0408 ,  H04L27/0008

Abstract: Various embodiments are disclosed relating to power control techniques for wireless transmitters. In an example embodiment, an apparatus is provided that may include a digital-to-analog converter (DAC) adapted to convert a digital amplitude signal to an analog amplitude signal during a first transmission mode and adapted to convert a digital power level signal to an analog power level signal during a second transmission mode.

Abstract translation: 公开了关于无线发射机的功率控制技术的各种实施例。 在一个示例性实施例中，提供了一种可以包括数模转换器（DAC）的装置，其适于在第一传输模式期间将数字幅度信号转换为模拟幅度信号，并且适于将数字功率电平信号转换为 在第二传输模式期间的模拟功率电平信号。

公开(公告)号：US08437420B2

公开(公告)日：2013-05-07

申请号：US13241469

申请日：2011-09-23

Applicant: Ahmadreza (Reza) Rofougaran ,  Hooman Darabi

Inventor： Ahmadreza (Reza) Rofougaran ,  Hooman Darabi

IPC: H04B7/06 ,  H04L27/12

CPC classification number: H04B1/001 ,  H03H19/00 ,  H03H2015/007 ,  H04B1/0028

Abstract: A transmitter includes a conversion module, a sample and hold module, and a discrete time bandpass filter module. The conversion module is operable to convert a first outbound baseband signal into a first outbound frequency domain pulse signal and to convert a second outbound baseband signal into a second outbound frequency domain pulse signal. The sample and hold module operable to sample and hold the first outbound frequency domain pulse signal and the second outbound frequency domain pulse signal to produce a frequency domain sample pulse train. The discrete time bandpass filter module is operable to filter the frequency domain sample pulse train to produce a first outbound wireless corresponding to the first baseband signal and to produce a second outbound wireless signal corresponding to the second inbound baseband signal.

Abstract translation: 发射机包括转换模块，采样和保持模块以及离散时间带通滤波器模块。 转换模块可操作以将第一出站基带信号转换为第一出站频域脉冲信号并将第二出站基带信号转换为第二出站频域脉冲信号。 采样和保持模块可操作以采样和保持第一出站频域脉冲信号和第二出站频域脉冲信号，以产生频域采样脉冲串。 离散时间带通滤波器模块可操作以对频域采样脉冲串进行滤波以产生对应于第一基带信号的第一出站无线电，并产生对应于第二入站基带信号的第二出站无线信号。

公开(公告)号：US20130070878A1

公开(公告)日：2013-03-21

申请号：US13613624

申请日：2012-09-13

Applicant: Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

Inventor： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC: H04B1/10 ,  H04B1/16

CPC classification number: H04B1/28 ,  H04B1/123

Abstract: A method and apparatus is disclosed to effectively frequency translate a filter characterized as a low quality factor (Q) filter, corresponding to a baseband frequency of approximately zero Hertz or to an intermediate frequency (IF), to a filter characterized as a high Q filter at frequencies greater than the baseband frequency or the IF. A downconversion mixer frequency translates a communication signal to the baseband frequency or the IF using a first local oscillator signal to provide a downconverted communication signal. A filter corresponding to the baseband frequency or the IF filters the downconverted communication signal to provide a filtered communication signal. An upconversion mixer frequency translates a communication signal using a second local oscillator signal. The frequency translation by the upconversion mixer, in effect, translates the filter characterization from the low Q filter to the high Q filter at frequencies greater than the baseband frequency or the IF.

Abstract translation: 公开了一种方法和装置，用于将表征为低质量因子（Q）滤波器的滤波器频率转换成对应于近似零赫兹的基带频率或中频（IF）的滤波器，其特征在于高Q滤波器 在大于基带频率或IF的频率处。 下变频混频器使用第一本地振荡器信号将通信信号转换为基带频率或IF，以提供下变频的通信信号。 对应于基带频率的滤波器或IF对经下变频的通信信号进行滤波以提供经滤波的通信信号。 上变频混频器使用第二本地振荡器信号来转换通信信号。 通过上变频混频器进行的频率转换实际上将滤波器特性从低Q滤波器转换为高于基带频率或IF的频率的高Q滤波器。

公开(公告)号：US08369818B2

公开(公告)日：2013-02-05

申请号：US13169681

申请日：2011-06-27

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H04B1/16 ,  H03F3/45

CPC classification number: H03F1/52 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/294 ,  H03F2200/444 ,  H03F2200/453 ,  H03F2200/78

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。

公开(公告)号：US20120329417A1

公开(公告)日：2012-12-27

申请号：US13169699

申请日：2011-06-27

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H04B7/00

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。

公开(公告)号：US08301097B2

公开(公告)日：2012-10-30

申请号：US12115263

申请日：2008-05-05

Applicant: Hooman Darabi ,  Henrik T. Jensen ,  Brima Ibrahim

Inventor： Hooman Darabi ,  Henrik T. Jensen ,  Brima Ibrahim

IPC: H04B1/06 ,  H04B7/00

CPC classification number: H03G1/007 ,  H03G3/3063 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/307

Abstract: A method for processing a plurality of signals may include amplifying an input signal and generating a wideband signal from the amplified input signal. The method may further include bandpass filtering the generated wideband signal to generate a narrowband signal, and adjusting amplification of the input signal based on a narrowband received signal strength indication of the generated narrowband signal, and/or a wideband received signal strength indication of the generated wideband signal. The amplified input signal may be downconverted to generate the wideband signal. The amplified input signal may be downconverted to an intermediate frequency (IF) and/or to a baseband signal to generate the wideband signal. At least one blocker signal may be bandpass filtered from the amplified input signal.

Abstract translation: 用于处理多个信号的方法可以包括放大输入信号并从放大的输入信号产生宽带信号。 该方法还可以包括对生成的宽带信号进行带通滤波以产生窄带信号，以及基于所生成的窄带信号的窄带接收信号强度指示和/或所生成的宽带信号强度指示来调整输入信号的放大 宽带信号。 放大的输入信号可以被下变频以产生宽带信号。 放大的输入信号可以下变频到中频（IF）和/或基带信号以产生宽带信号。 至少一个阻塞信号可以从放大的输入信号进行带通滤波。

公开(公告)号：US08224275B2

公开(公告)日：2012-07-17

申请号：US12485657

申请日：2009-06-16

Applicant: Ahmad Mirzaei ,  Hooman Darabi

Inventor： Ahmad Mirzaei ,  Hooman Darabi

IPC: H04L27/00

CPC classification number: H04B1/30

Abstract: Embodiments of a SAW-less RF receiver front-end that includes a frequency translated notch filter (FTNF) are presented. An FTNF includes a passive mixer and a baseband impedance. The baseband impedance includes capacitors that form a low-Q band-stop filter. The passive mixer is configured to translate the baseband impedance to a higher frequency. The translated baseband impedance forms a high-Q notch filter and is presented at the input of the FTNF. The FTNF can be fully integrated in CMOS IC technology (or others, e.g., Bipolar, BiCMOS, and SiGe) and applied in wireless receiver systems including EDGE/GSM, Wideband Code Division Multiple Access (WCDMA), Bluetooth, and wireless LANs (e.g., IEEE 802.11). In addition, embodiments of a multi-band SAW-less RF receiver front-end and techniques to share components of FTNFs included within the multi-band SAW-less RF receiver front-end are presented.

Abstract translation: 提供了包括频率转换陷波滤波器（FTNF）的无SAW无RF接收机前端的实施例。 FTNF包括无源混频器和基带阻抗。 基带阻抗包括形成低Q带阻滤波器的电容器。 无源混频器被配置为将基带阻抗转换到更高的频率。 经翻译的基带阻抗形成高Q陷波滤波器，并呈现在FTNF的输入端。 FTNF可以完全集成到CMOS IC技术（或其他，例如双极，BiCMOS和SiGe）中，并应用于无线接收机系统，包括EDGE / GSM，宽带码分多址（WCDMA），蓝牙和无线局域网（例如 ，IEEE 802.11）。 此外，提出了多频无SAW无线RF接收机前端的实施例以及共享包含在多频带无SAW RF接收器前端内的FTNF的组件的技术。

公开(公告)号：US08107908B2

公开(公告)日：2012-01-31

申请号：US12028464

申请日：2008-02-08

Applicant: Hooman Darabi

Inventor： Hooman Darabi

IPC: H04B17/00 ,  H04B17/02 ,  H04B1/26

CPC classification number: H04B1/005 ,  H04B1/406

Abstract: Selective fast image rejection. Selective down conversion processing is performed on a received signal based on the signal strength of that received signal. As few as two possible down conversion frequencies can be employed so that the received signal is down converted either to a first down converted signal having a first intermediate frequency or to a second down converted signal having a second intermediate frequency. If desired, the received signal can either be down converted using low side injection or high side injection down conversion processing. Alternatively, a larger number of possible down conversion frequencies so that the received signal is down converted to one of the possible down conversion frequencies based on the signal strength of the received signal.

Abstract translation: 选择性快速图像抑制。 基于接收信号的信号强度对接收信号执行选择性下变频处理。 可以采用少至两个可能的下变频率，使得接收信号被下变频到具有第一中频的第一下变频信号或具有第二中频的第二下变频信号。 如果需要，接收到的信号可以使用低侧注入或高侧注入转换处理进行下变频。 或者，更大数量的可能的下变频频率，使得接收信号基于接收信号的信号强度被下变频成可能的下变频频率之一。

公开(公告)号：US20110299634A1

公开(公告)日：2011-12-08

申请号：US13076236

申请日：2011-03-30

Applicant: Ahmad Mirzaei ,  Hooman Darabi

Inventor： Ahmad Mirzaei ,  Hooman Darabi

IPC: H04L27/06

CPC classification number: H03H7/0169 ,  H03F3/45179 ,  H03F2200/294 ,  H03F2203/45731 ,  H03H7/1775 ,  H03H11/1291 ,  H03H19/008 ,  H03H2007/0192 ,  H04B1/28

Abstract: A SAW-less receiver includes an FEM interface module, an RF to IF receiver section, and a receiver IF to baseband section. The RF to IF receiver section includes an RF frequency translated bandpass filter (FTBPF), an LNA, and a mixing section. The RF FTBPF frequency translates a baseband filter response to an RF filter response and filters an inbound RF signal in accordance with the RF filter response, wherein the inbound RF signal includes a loss error due to switching loss and/or inductor loss. The RF FTBPF also compensates the loss error based on a negative resistance. The LNA amplifies the compensated inbound RF signal and the mixing section mixes the amplified inbound RF signal with a local oscillation to produce an inbound IF signal. The receiver IF to baseband section converts the inbound IF signal into one or more inbound symbol streams.

Abstract translation: 无SAW接收机包括FEM接口模块，RF至IF接收机部分和接收机IF到基带部分。 RF至IF接收器部分包括RF频率转换带通滤波器（FTBPF），LNA和混频部分。 RF FTBPF频率将基带滤波器响应转换为RF滤波器响应，并根据RF滤波器响应对入站RF信号进行滤波，其中入站RF信号包括由于开关损耗和/或电感器损耗引起的损耗误差。 RF FTBPF还可以基于负电阻补偿损耗误差。 LNA放大经补偿的入站RF信号，并且混合部分将放大的入站RF信号与本地振荡混频以产生入站IF信号。 接收机IF到基带部分将入站IF信号转换成一个或多个入站符号流。