公开(公告)号：US20100317311A1

公开(公告)日：2010-12-16

申请号：US12481702

申请日：2009-06-10

申请人： Ahmad MIRZAEI ,  Hooman DARABI ,  Yuyu CHANG

发明人： Ahmad MIRZAEI ,  Hooman DARABI ,  Yuyu CHANG

IPC分类号： H04B1/10

CPC分类号： H04B1/1036 ,  H03H19/008

摘要： 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 GSM, EDGE, Wideband Code Division Multiple Access (WCDMA), Bluetooth, and wireless LANs (e.g., IEEE 802.11). In addition, embodiments of an apparatus to protect SAW-less RF receiver front-ends are presented.

摘要翻译： 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GSM，EDGE，宽带码分多址（WCDMA），蓝牙和无线局域网（例如 ，IEEE 802.11）。 另外，还提出了用于保护无SAW射频接收器前端的装置的实施例。

公开(公告)号：US20120068743A1

公开(公告)日：2012-03-22

申请号：US13237571

申请日：2011-09-20

申请人： Michael YOUSSEF ,  Ahmad MIRZAEI ,  Hooman DARABI

发明人： Michael YOUSSEF ,  Ahmad MIRZAEI ,  Hooman DARABI

IPC分类号： H03L7/08

CPC分类号： H03L7/099 ,  H03L7/02 ,  H03L7/07 ,  H03L7/087 ,  H03L2207/05

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20100317308A1

公开(公告)日：2010-12-16

申请号：US12485657

申请日：2009-06-16

申请人： Ahmad MIRZAEI ,  Hooman DARABI

发明人： Ahmad MIRZAEI ,  Hooman DARABI

IPC分类号： H04B1/06

CPC分类号： H04B1/30

摘要： 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.

摘要翻译： 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：US20110003574A1

公开(公告)日：2011-01-06

申请号：US12496325

申请日：2009-07-01

申请人： Yuyu CHANG ,  Hooman DARABI

发明人： Yuyu CHANG ,  Hooman DARABI

IPC分类号： H04B1/16 ,  H03K3/011

CPC分类号： G05F3/242

摘要： Embodiments of the present invention provide constant output DC biasing circuits. Embodiments employ an open loop scheme, instead of a closed loop scheme as used in conventional circuits. In addition, embodiments generate a DC bias voltage that is independent of temperature, process, and power supply variations. Further, embodiments require low amounts of power and silicon.

摘要翻译： 本发明的实施例提供恒定的输出DC偏置电路。 实施例采用开环方案，而不是常规电路中使用的闭环方案。 此外，实施例产生独立于温度，过程和电源变化的DC偏置电压。 此外，实施例需要少量的功率和硅。

公开(公告)号：US20100240328A1

公开(公告)日：2010-09-23

申请号：US12789470

申请日：2010-05-28

申请人： Mohammad NARIMAN ,  Alireza ZOLFAGHARI ,  Hooman DARABI

发明人： Mohammad NARIMAN ,  Alireza ZOLFAGHARI ,  Hooman DARABI

IPC分类号： H04B1/02

CPC分类号： H04B1/0483

摘要： 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.

摘要翻译： 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：US20140045443A1

公开(公告)日：2014-02-13

申请号：US13584492

申请日：2012-08-13

申请人： Ahmadreza ROFOUGARAN ,  Hooman DARABI ,  David MURPHY

发明人： Ahmadreza ROFOUGARAN ,  Hooman DARABI ,  David MURPHY

IPC分类号： H04B1/16

CPC分类号： H04B1/1036 ,  H04B1/10

摘要： Because of associated disadvantages of narrow-band off-chip radio-frequency (RF) filtering, a mixer-first receiver front-end designed to tolerate blockers with minimal gain compression and noise factor degradation is disclosed. The mixer-first receiver front-end includes two separate down-conversion paths that help to minimize added noise and voltage gain prior to baseband filtering, which are critical factors in eliminating narrow-band off-chip RF filtering.

摘要翻译： 由于窄带片外射频（RF）滤波的相关缺点，公开了设计用于容忍具有最小增益压缩和噪声因子降级的阻塞器的混频器优先接收机前端。 混频器第一接收机前端包括两个单独的下变频路径，有助于在基带滤波之前最大限度地减少附加噪声和电压增益，这是消除窄带片外RF滤波的关键因素。

公开(公告)号：US20130028363A1

公开(公告)日：2013-01-31

申请号：US13241446

申请日：2011-09-23

申请人： Ahmadreza (Reza) ROFOUGARAN ,  Hooman DARABI

发明人： Ahmadreza (Reza) ROFOUGARAN ,  Hooman DARABI

IPC分类号： H04B1/10

CPC分类号： H04B1/001 ,  H03H19/00 ,  H03H2015/007 ,  H04B1/0028

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

摘要翻译： 接收机包括采样和保持模块，离散时间滤波器模块和转换模块。 采样和保持模块可操作以采样和保持第一入站无线信号和第二入站无线信号以产生频域采样脉冲串。 离散时间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入站无线信号的第一滤波采样脉冲并产生对应于第二入站无线信号的第二滤波采样脉冲。 转换模块可操作以将第一滤波采样脉冲转换为第一入站基带信号并将第二滤波采样脉冲转换为第二入站基带信号。

公开(公告)号：US20130028351A1

公开(公告)日：2013-01-31

申请号：US13241438

申请日：2011-09-23

申请人： Ahmadreza (Reza) ROFOUGARAN ,  Hooman DARABI

发明人： Ahmadreza (Reza) ROFOUGARAN ,  Hooman DARABI

IPC分类号： H04L27/00

CPC分类号： H04B1/001 ,  H03H19/00 ,  H03H2015/007 ,  H04B1/0028

摘要： A receiver includes a sample and hold module, sample memory, a discrete time filter module, and a conversion module. The sample and hold module is operable to sample and hold an inbound wireless signal to produce a frequency domain sample pulse train. The sample memory is operable to store sample pulses of the frequency domain sample pulse train to produce a stored sample pulse train. The discrete time filter module is operable to filter the stored sample pulse train to produce a filtered sample pulse. The conversion module is operable to convert the filtered sample pulse into an inbound baseband signal.

摘要翻译： 接收机包括采样和保持模块，采样存储器，离散时间滤波器模块和转换模块。 采样和保持模块可操作以采样和保持入站无线信号以产生频域采样脉冲串。 采样存储器可操作地存储频域采样脉冲串的采样脉冲以产生存储的采样脉冲串。 离散时间滤波器模块可操作以对存储的采样脉冲序列进行滤波以产生滤波后的采样脉冲。 转换模块可操作以将滤波的采样脉冲转换成入站基带信号。

公开(公告)号：US20110299433A1

公开(公告)日：2011-12-08

申请号：US13075549

申请日：2011-03-30

申请人： Hooman DARABI ,  Ahmadreza (Reza) ROFOUGARAN

发明人： Hooman DARABI ,  Ahmadreza (Reza) ROFOUGARAN

IPC分类号： H04B1/38 ,  H04B7/00

CPC分类号： H04B1/525

摘要： A front-end module (FEM) includes first and second frequency band power amplifiers (PA), first and second frequency band receiver-transmitter (RX-TX) isolation modules, and an antenna interface unit. The PAs are operable to amplify first and second frequency band outbound RF signals, respectively. The RX-TX isolation modules are operable to isolate first and second frequency band inbound RF signals from first and second frequency band outbound RF signals in accordance with first and second frequency band isolation tuning signal, respectively. The antenna interface unit is operably tuned in accordance with an antenna interface tuning signal to output at least one of the first frequency band outbound RF signal and the second frequency band outbound RF signal and to receive at least one of the first frequency band inbound RF signal and the second frequency band inbound RF signal.

摘要翻译： 前端模块（FEM）包括第一和第二频带功率放大器（PA），第一和第二频带接收发射机（RX-TX）隔离模块和天线接口单元。 PA可以分别放大第一和第二频带出站RF信号。 RX-TX隔离模块可操作以分别根据第一和第二频带隔离调谐信号隔离来自第一和第二频带出站RF信号的第一和第二频带入站RF信号。 天线接口单元根据天线接口调谐信号被可操作地调谐以输出第一频带出站RF信号和第二频带出站RF信号中的至少一个，并且接收第一频带入站RF信号中的至少一个 和第二频带入站RF信号。

公开(公告)号：US20110064004A1

公开(公告)日：2011-03-17

申请号：US12567071

申请日：2009-09-25

申请人： Mohyee MIKHEMAR ,  Hooman DARABI

发明人： Mohyee MIKHEMAR ,  Hooman DARABI

IPC分类号： H04B7/005 ,  H04B1/44

CPC分类号： H04B1/525 ,  H04B1/18

摘要： Embodiments of an RF front-end are presented herein. In an embodiment, the RF front end comprises a power amplifier (PA), a noise-matched low-noise amplifier (LNA), a balance network, and a four-port isolation module. A first port of the isolation module is coupled to an antenna. The second port of the isolation module is coupled to the balancing network. The third port is coupled an output of the PA. The fourth port is coupled to a differential input of the noise-matched LNA. The isolation module effectively isolates the third port from the fourth port to prevent strong outbound signals received at the third port from saturating the LNA coupled to the fourth port. Isolation is achieved via electrical balance. In an embodiment, the signal path coupling the antenna at the first port to the differential input of the LNA at the fourth port is shorter than a wavelength of the inbound signal received by the antenna.

摘要翻译： 这里呈现RF前端的实施例。 在一个实施例中，RF前端包括功率放大器（PA），噪声匹配低噪声放大器（LNA），平衡网络和四端口隔离模块。 隔离模块的第一端口耦合到天线。 隔离模块的第二个端口耦合到平衡网络。 第三个端口耦合PA的输出。 第四端口耦合到噪声匹配LNA的差分输入。 隔离模块有效地将第三端口与第四端口隔离，以防止在第三端口处接收的强大的出站信号使连接到第四端口的LNA饱和。 通过电气平衡实现隔离。 在一个实施例中，将第一端口处的天线耦合到第四端口处的LNA的差分输入的信号路径比由天线接收的入站信号的波长短。