公开(公告)号：US20080317165A1

公开(公告)日：2008-12-25

申请号：US11820671

申请日：2007-06-19

申请人： Mahdi Bagheri ,  Rahim Bagheri ,  Saeed Chehrazi ,  Masoud Djafari ,  Hassan Maarefi ,  Ahmad Mirzaei ,  Edris Rostami ,  Alireza Tarighat-Mehrabani

发明人： Mahdi Bagheri ,  Rahim Bagheri ,  Saeed Chehrazi ,  Masoud Djafari ,  Hassan Maarefi ,  Ahmad Mirzaei ,  Edris Rostami ,  Alireza Tarighat-Mehrabani

IPC分类号： H04L25/03

CPC分类号： H04B17/14 ,  H04B17/101

摘要： In one embodiment the present invention includes a method of calibrating the frequency response of a transmitter comprising generating a plurality of calibration tones across a frequency range, coupling the plurality of calibration tones to an input of said transmitter, detecting the plurality of calibration tones at an output in said transmitter, and in accordance therewith, generating a plurality of calibration values, receiving digital data to be transmitted, the digital data comprising a plurality of frequency components in said frequency range, and calibrating said frequency components of said digital data using the calibration values.

摘要翻译： 在一个实施例中，本发明包括一种校准发射机的频率响应的方法，包括在频率范围内产生多个校准音调，将多个校准音调耦合到所述发射机的输入端，在多个校准音调 在所述发射机中输出，并且根据其产生多个校准值，接收要发射的数字数据，所述数字数据包括所述频率范围内的多个频率分量，并且使用校准来校准所述数字数据的所述频率分量 价值观。

公开(公告)号：US07403048B2

公开(公告)日：2008-07-22

申请号：US11142575

申请日：2005-06-01

申请人： Mohammad E Heidari ,  Ahmad Mirzaei ,  Masoud Djafari ,  Rahim Bagheri

发明人： Mohammad E Heidari ,  Ahmad Mirzaei ,  Masoud Djafari ,  Rahim Bagheri

IPC分类号： H03B19/00

CPC分类号： H03K23/44

摘要： Embodiments of the present invention include circuits and methods for dividing signals. In one embodiment the present invention includes a divider circuit comprising at least one first divider input receiving an in-phase (I+) signal, at least one second divider input receiving a complement of the in-phase (I−) signal, at least one third divider input receiving a quadrature (Q+) signal, and at least one fourth divider input receiving a complement of the quadrature (Q−) signal. In one embodiment, the lock range of a divider is improved by providing a first bias current greater than a second bias current.

摘要翻译： 本发明的实施例包括用于分割信号的电路和方法。 在一个实施例中，本发明包括分频器电路，其包括接收同相（I +）信号的至少一个第一分频器输入，接收同相（I-）信号的补码的至少一个第二分频器输入，至少一个 接收正交（Q +）信号的第三分频器输入端和接收正交（Q-）信号的补码的至少一个第四分频器输入端。 在一个实施例中，通过提供大于第二偏置电流的第一偏置电流来改善分频器的锁定范围。

公开(公告)号：US08836374B2

公开(公告)日：2014-09-16

申请号：US13168143

申请日：2011-06-24

申请人： Amir Hadji-Abdolhamid ,  Ahmad Mirzaei ,  Hooman Darabi

发明人： Amir Hadji-Abdolhamid ,  Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： G01R19/00 ,  H03F3/45 ,  H03K19/00 ,  H03F3/24 ,  H03F3/189 ,  H03F1/02

CPC分类号： H03K19/00 ,  H03F1/0261 ,  H03F3/189 ,  H03F3/245 ,  H03F3/45179 ,  H03F2200/27 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2200/555 ,  H03F2203/45394

摘要： According to one embodiment, a high performance buffer for use in a communications system includes first and second differential blocks. Each of the first and second differential blocks comprise one or more driving transistors for generating a driving current for a load of the high performance buffer, and a feedback path for adjusting the operation of the one or more driving transistors. The feedback path includes a feedback transistor for receiving a common mode bias voltage, wherein the common mode bias voltage depends at least in part on a threshold voltage of the feedback transistor. The feedback path includes a programmable resistor and capacitor to reduce out of band loop gain and the noise. The high performance buffer is configured to achieve a high linearity, low output impedance, and low noise, and is suitable for use as a pre-mixer buffer in a wireless communications system.

摘要翻译： 根据一个实施例，用于通信系统的高性能缓冲器包括第一和第二差分块。 第一和第二差分块中的每一个包括用于产生用于高性能缓冲器的负载的驱动电流的一个或多个驱动晶体管，以及用于调整一个或多个驱动晶体管的操作的反馈路径。 反馈路径包括用于接收共模偏置电压的反馈晶体管，其中共模偏置电压至少部分地取决于反馈晶体管的阈值电压。 反馈路径包括可编程电阻器和电容器，以减少带外环路增益和噪声。 高性能缓冲器被配置为实现高线性度，低输出阻抗和低噪声，并且适合用作无线通信系统中的预混频器缓冲器。

公开(公告)号：US08655299B2

公开(公告)日：2014-02-18

申请号：US13076183

申请日：2011-03-30

申请人： Ahmad Mirzaei ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： H04B1/10

CPC分类号： H04B1/10 ,  H03F1/083 ,  H03F3/45179 ,  H04B1/006 ,  H04B1/1638 ,  H04B1/28 ,  H04B1/401

摘要： 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 a frequency translated bandpass filter (FTBPF), an LNA, and a mixing section. The FTBPF includes a switching network and a plurality of baseband impedances. The switching network is operable to couple the plurality of baseband impedances to the FEM interface in accordance with a plurality of phase-offset RF clock signals to RF bandpass filter the inbound RF signal. 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 receiver IF to baseband section converts the inbound IF signal into one or more inbound symbol streams.

摘要翻译： 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接收器部分包括频率转换带通滤波器（FTBPF），LNA和混频部分。 FTBPF包括交换网络和多个基带阻抗。 交换网络可操作以根据多个相位偏移RF时钟信号将多个基带阻抗耦合到FEM接口，以对入站RF信号进行RF带通滤波。 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。 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。

公开(公告)号：US08515368B2

公开(公告)日：2013-08-20

申请号：US11947269

申请日：2007-11-29

申请人： Ahmad Mirzaei ,  John Leete ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  John Leete ,  Hooman Darabi

IPC分类号： H04B1/04

CPC分类号： H04B1/62 ,  H04B1/0458 ,  H04B2001/0416

摘要： An apparatus comprising: a baseband filter configured to produce a baseband signal utilizing an input signal; a mixer unit configured to produce an intermediate signal utilizing the baseband signal and a local oscillator signal; and a dynamically configurable transformer configured to provide a gain to the intermediate signal, wherein the gain is dynamically configurable.

摘要翻译： 一种装置，包括：基带滤波器，被配置为利用输入信号产生基带信号; 混频器单元，被配置为使用所述基带信号和本地振荡器信号产生中间信号; 以及被配置为向所述中间信号提供增益的动态可配置变压器，其中所述增益是可动态配置的。

公开(公告)号：US08467760B2

公开(公告)日：2013-06-18

申请号：US12497298

申请日：2009-07-02

申请人： Ahmad Mirzaei ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： H04B1/18 ,  H04B1/10

CPC分类号： 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 EDGE/GSM, Wideband Code Division Multiple Access (WCDMA), Bluetooth, and wireless LANs (e.g., IEEE 802.11). In addition, embodiments of a generalized FTNF for wideband applications 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）。 另外，提出了宽带应用的广义FTNF的实施例。

公开(公告)号：US08301101B2

公开(公告)日：2012-10-30

申请号：US12470789

申请日：2009-05-22

申请人： Ahmad Mirzaei ,  Hooman Darabi ,  John Leete

发明人： Ahmad Mirzaei ,  Hooman Darabi ,  John Leete

IPC分类号： H04B1/18 ,  H04B1/10

CPC分类号： H04B1/30 ,  H03D7/1458 ,  H03D7/1466 ,  H03H19/004

摘要： Embodiments of a frequency translated filter (FTF) are presented. An FTF includes a passive mixer and a baseband impedance. The baseband impedance includes a network of one or more passive components (e.g., resistors, inductors, and capacitors) that form a low-Q filter. The passive mixer is configured to translate the baseband impedance to a higher frequency. The translated baseband impedance forms a high-Q filter and is presented at the input of the FTF. The FTF can be fully integrated in CMOS IC technology (or others, e.g., Bipolar, BiCMOS, and SiGe) and applied in wireless receiver systems including GSM, Wideband Code Division Multiple Access (WCDMA), Bluetooth, and wireless LANs (e.g., IEEE 802.11).

摘要翻译： 提出了频率转换滤波器（FTF）的实施例。 FTF包括无源混频器和基带阻抗。 基带阻抗包括形成低Q滤波器的一个或多个无源组件（例如，电阻器，电感器和电容器）的网络。 无源混频器被配置为将基带阻抗转换到更高的频率。 转换的基带阻抗形成高Q滤波器，并在FTF的输入端呈现。 FTF可以完全集成在CMOS IC技术（或其他，例如双极，BiCMOS和SiGe）中，并且应用于包括GSM，宽带码分多址（WCDMA），蓝牙和无线LAN（例如IEEE）的无线接收机系统中 802.11）。

公开(公告)号：US08275332B2

公开(公告)日：2012-09-25

申请号：US13303066

申请日：2011-11-22

申请人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

IPC分类号： H04B1/04

CPC分类号： H03G1/0029 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0025 ,  H03G1/0088

摘要： An apparatus comprising a plurality of switchable full step mixer unit cells, wherein each switchable full step unit cell is configured to, when the full step transceiver mixer unit cell is turned on, increase the gain experienced by an electronic signal by a full step increment, and wherein the step increment is substantially constant regardless of temperature; and at least one switchable partial step mixer unit cell configured to, when the partial step transceiver mixer unit is turned on, increase the gain experienced by the electronic signal by a predetermined step increment less than that of a full step, and wherein the partial step increment is substantially constant regardless of temperature.

摘要翻译： 一种包括多个可切换全步骤混合器单位单元的装置，其中每个可切换全阶单元单元被配置为当全步进收发器混合器单元被接通时，增加电子信号经历的增益全步进增量， 并且其中所述阶梯增量基本上恒定，不管温度如何; 以及至少一个可切换部分步骤混合器单元，其被配置为当所述部分步骤收发器混合器单元被接通时，增加所述电子信号经历的增益小于完整步长的预定步长增量，并且其中所述部分步骤 无论温度如何，增量都是基本恒定的。

公开(公告)号：US08238862B2

公开(公告)日：2012-08-07

申请号：US12497317

申请日：2009-07-02

申请人： Ahmad Mirzaei ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： H04B1/18 ,  H04B1/10

CPC分类号： H04B1/1036 ,  H03F1/223 ,  H03F3/195 ,  H03F3/45179 ,  H03F2200/294 ,  H03F2203/45302 ,  H03F2203/45394 ,  H03H19/008 ,  H03H2011/0488

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. In an embodiment, the capacitors are implemented using MOS capacitors. In another embodiment, the capacitors are partially formed from MOS capacitors and fringe capacitors. 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).

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。 在一个实施例中，使用MOS电容器实现电容器。 在另一个实施例中，电容器部分地由MOS电容器和边缘电容器形成。 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）。

公开(公告)号：US20120071119A1

公开(公告)日：2012-03-22

申请号：US13303066

申请日：2011-11-22

申请人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

IPC分类号： H04B1/04

CPC分类号： H03G1/0029 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0025 ,  H03G1/0088

摘要： An apparatus comprising a plurality of switchable full step mixer unit cells, wherein each switchable full step unit cell is configured to, when the full step transceiver mixer unit cell is turned on, increase the gain experienced by an electronic signal by a full step increment, and wherein the step increment is substantially constant regardless of temperature; and at least one switchable partial step mixer unit cell configured to, when the partial step transceiver mixer unit is turned on, increase the gain experienced by the electronic signal by a predetermined step increment less than that of a full step, and wherein the partial step increment is substantially constant regardless of temperature.

摘要翻译： 一种包括多个可切换全步骤混合器单位单元的装置，其中每个可切换全阶单元单元被配置为当全步进收发器混合器单元被接通时，增加电子信号经历的增益全步进增量， 并且其中所述阶梯增量基本上恒定，不管温度如何; 以及至少一个可切换部分步骤混合器单元，其被配置为当所述部分步骤收发器混合器单元被接通时，增加所述电子信号经历的增益小于完整步长的预定步长增量，并且其中所述部分步骤 无论温度如何，增量都是基本恒定的。