公开(公告)号：US20100303172A1

公开(公告)日：2010-12-02

申请号：US12473571

申请日：2009-05-28

Applicant: Alireza Zolfaghari ,  Hooman Darabi ,  Ahmad Mirzaei

Inventor： Alireza Zolfaghari ,  Hooman Darabi ,  Ahmad Mirzaei

IPC: H04L27/20 ,  H04L27/00

CPC classification number: H04L27/0008 ,  H04B1/0475

Abstract: A transmitter operates in different modulation modes to support both GSM/EDGE and WCDMA cellular telephony applications. The transmitter modulates an outgoing signal to produce a complex modulated signal in a first modulation mode and a constant or variable envelope modulated signal in a second modulation mode. A local oscillation generator and mixer operate to up-convert the complex modulated signal to produce a modulated RF signal in the first modulation mode and to up-convert the phase component of the constant or variable envelope modulated signal to an RF phase signal and mix the RF phase signal with the envelope component thereof to produce the modulated RF signal in the second modulation mode.

Abstract translation: 发射机以不同的调制模式工作，以支持GSM / EDGE和WCDMA蜂窝电话应用。 发射机调制输出信号以在第一调制模式中产生复调制信号，并以第二调制模式调制恒定或可变包络调制信号。 本地振荡发生器和混频器用于上变频复调制信号以在第一调制模式中产生经调制的RF信号，并将恒定或可变包络调制信号的相位分量上变频为RF相位信号，并将 RF相位信号及其包络分量，以在第二调制模式中产生经调制的RF信号。

公开(公告)号：US07840202B2

公开(公告)日：2010-11-23

申请号：US12268957

申请日：2008-11-11

Applicant: Brima Ibrahim ,  Hea Joung Kim ,  Hooman Darabi

Inventor： Brima Ibrahim ,  Hea Joung Kim ,  Hooman Darabi

IPC: H04B1/06

CPC classification number: H04L25/061 ,  H03D3/008 ,  H03F1/34 ,  H03F2200/336 ,  H03F2200/375 ,  H03G3/001 ,  H03G3/3068 ,  H04B1/30 ,  H04L25/063 ,  H04L27/0002 ,  H04L27/364 ,  H04L27/366

Abstract: System and method for processing signals are disclosed. The method may include converting, in an RF receiver, one or more analog samples, which are selected from one of a plurality of output paths of the RF receiver, to one or more digital samples. A digital feedback value may be generated based on an average of the one or more converted digital samples. A scaled version of the generated digital feedback value may be converted to an analog value. The converted analog value may be fed back to one or more of a plurality of input paths of the RF receiver. The one or more analog samples may be selected from among a plurality of output analog samples from the plurality of output paths of the RF receiver.

Abstract translation: 公开了用于处理信号的系统和方法。 该方法可以包括在RF接收机中将从RF接收机的多个输出路径中的一个中选择的一个或多个模拟样本转换成一个或多个数字样本。 可以基于一个或多个转换的数字样本的平均值来生成数字反馈值。 生成的数字反馈值的缩放版本可以被转换为模拟值。 转换的模拟值可以被反馈到RF接收机的多个输入路径中的一个或多个。 可以从RF接收机的多个输出路径的多个输出模拟采样中选择一个或多个模拟采样。

公开(公告)号：US20100203848A1

公开(公告)日：2010-08-12

申请号：US12765754

申请日：2010-04-22

Applicant: Hooman Darabi

Inventor： Hooman Darabi

IPC: H04B1/40

CPC classification number: H03L7/0898 ,  H03L7/099 ,  H03L7/183 ,  H03L2207/06

Abstract: A local oscillation generator (LO-GEN) maintains a fixed bandwidth using a voltage controlled oscillator (VCO) calibration module and gain calibration module that together compensate for variations in the VCO gain based on the oscillation frequency. During an open loop calibration of the LO-GEN, the VCO calibration module programs the VCO gain to an initial coarse value based on the oscillation frequency and then the gain calibration module adjusts the charge pump current to compensate for VCO gain changes.

Abstract translation: 本地振荡发生器（LO-GEN）使用压控振荡器（VCO）校准模块和增益校准模块来维持固定带宽，该校准模块一起根据振荡频率补偿VCO增益的变化。 在LO-GEN的开环校准期间，VCO校准模块根据振荡频率将VCO增益编程为初始粗略值，然后增益校准模块调整电荷泵电流以补偿VCO增益变化。

公开(公告)号：US20100135434A1

公开(公告)日：2010-06-03

申请号：US12702198

申请日：2010-02-08

Applicant: Alireza Zolfaghari ,  Hooman Darabi

Inventor： Alireza Zolfaghari ,  Hooman Darabi

IPC: H04L27/00

CPC classification number: H03L7/093 ,  H03L7/0891 ,  H03L7/18

Abstract: A phase locked loop (PLL) a phase detector, a charge pump, a loop filter, a controlled oscillator, and a feedback divider. The phase detector is coupled to produce a difference signal based on a difference between phase of a reference oscillation and phase of a feedback oscillation. The charge pump is coupled to convert the difference signal into an up-signal or a down signal. The loop filter coupled to filter the up signal or the down signal to produce a control signal. The controlled oscillator is coupled to generate an output oscillation based on the control signal. The feedback divider is coupled to generate the feedback oscillation from the output oscillation based on a divider value. The loop filter includes a first resistor-capacitor circuit and a second resistor-capacitor circuit. The first resistor-capacitor circuit is calibrated using a first calibration technique and the second resistor-capacitor circuit is calibrated using a second calibration technique.

Abstract translation: 锁相环（PLL），相位检测器，电荷泵，环路滤波器，受控振荡器和反馈分压器。 相位检测器被耦合以基于参考振荡的相位与反馈振荡的相位之间的差产生差分信号。 电荷泵被耦合以将差信号转换成上信号或下信号。 该滤波器被耦合以对上行信号或下降信号进行滤波以产生控制信号。 受控振荡器被耦合以基于控制信号产生输出振荡。 反馈分压器被耦合以基于分频器值从输出振荡产生反馈振荡。 环路滤波器包括第一电阻 - 电容电路和第二电阻 - 电容电路。 使用第一校准技术校准第一电阻器电容器电路，并且使用第二校准技术校准第二电阻器电容器电路。

公开(公告)号：US07647026B2

公开(公告)日：2010-01-12

申请号：US11355818

申请日：2006-02-16

Applicant: Hooman Darabi

Inventor： Hooman Darabi

IPC: H04B17/00

CPC classification number: H04B1/40 ,  H04B17/21

Abstract: Various embodiments are disclosed relating to a wireless transceiver. In an example embodiment, a wireless transceiver may include a transmitter adapted to output a signal at an image frequency (e.g., a simulated image) for a channel during a first mode (e.g., calibration mode) of operation. The wireless transceiver also includes a receiver adapted to receive, via loopback from the transmitter, the (e.g., simulated) image frequency signal and to determine digitally a receiver in-phase/quadrature-phase (I/Q) signal calibration adjustment based on the (simulated) image frequency signal to improve a match in amplitude and a predetermined phase shift between I and Q signals of the receiver during the first (e.g., calibration) mode of operation. The I/Q calibration adjustment may be applied to received signals during a second mode (e.g., operation mode) of operation to improve image rejection.

Abstract translation: 公开了关于无线收发器的各种实施例。 在示例实施例中，无线收发器可以包括适于在操作的第一模式（例如，校准模式）期间输出用于信道的图像频率（例如，模拟图像）的信号的发射器。 无线收发器还包括接收器，适于通过来自发射机的环回接收（例如，模拟的）图像频率信号，并且基于接收机的同相/正交相位（I / Q）信号校准调整来数字地接收 （模拟）图像频率信号，以改善在第一（例如校准）操作模式期间接收机的I和Q信号之间的幅度匹配和预定的相移。 可以在操作的第二模式（例如，操作模式）期间将I / Q校准调整应用于接收信号，以改善图像抑制。

公开(公告)号：US20090221260A1

公开(公告)日：2009-09-03

申请号：US12464156

申请日：2009-05-12

Applicant: Qiang (Tom) Li ,  Hooman Darabi

Inventor： Qiang (Tom) Li ,  Hooman Darabi

IPC: H04B1/16 ,  H04B1/10

CPC classification number: H03H11/1291

Abstract: A multiple stage band pass filter of a Radio Frequency (RF) Integrated Circuit is provided with a low pass mixer output filter coupled to receive a down sampled analog information signal, a buffer coupled to an output of the low pass mixer output filter, a low pass buffer output filter coupled to an output of the buffer and a plurality of band pass filters coupled to an output of the low pass buffer output filter.

Abstract translation: 射频（RF）集成电路的多级带通滤波器设置有低通混频器输出滤波器，耦合以接收下采样的模拟信息信号，耦合到低通混频器输出滤波器的输出的缓冲器，低 耦合到缓冲器的输出的多通道缓冲器输出滤波器以及耦合到低通缓冲器输出滤波器的输出的多个带通滤波器。

公开(公告)号：US20090203338A1

公开(公告)日：2009-08-13

申请号：US12028464

申请日：2008-02-08

Applicant: Hooman Darabi

Inventor： Hooman Darabi

IPC: H04B17/00

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：US20090189687A1

公开(公告)日：2009-07-30

申请号：US12020132

申请日：2008-01-25

Applicant: Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

Inventor： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

IPC: H04B1/10 ,  H03F3/04 ,  H03M1/66

CPC classification number: H03H11/0466

Abstract: A circuit (e.g., a reconstruction filtering circuit) may include a single operational amplifier (op-amp) that is arranged to receive a voltage input and that is arranged to have a biasing of constant gmR, a first device capacitor that is operatively coupled to an output of the single op-amp, a first resistor that is operatively coupled to the first device capacitor, a second device capacitor that is operatively coupled to the first resistor, and a mirror device that is operatively coupled to the second device capacitor, where the mirror device is arranged to provide a feedback loop as a feedback input to the single op-amp and that is arranged to provide a current output.

Abstract translation: 电路（例如，重构滤波电路）可以包括单个运算放大器（运算放大器），其被布置为接收电压输入并且被布置为具有恒定的gmR的偏置，第一器件电容器可操作地耦合到 单个运算放大器的输出，可操作地耦合到第一器件电容器的第一电阻器，可操作地耦合到第一电阻器的第二器件电容器，以及可操作地耦合到第二器件电容器的反射镜器件，其中 反射镜装置被布置成提供作为对单个运算放大器的反馈输入的反馈回路，并且被布置成提供电流输出。

公开(公告)号：US20090143027A1

公开(公告)日：2009-06-04

申请号：US11947240

申请日：2007-11-29

Applicant: Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

Inventor： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

IPC: H04B1/40

CPC classification number: H03G1/0029 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0025 ,  H03G1/0088

Abstract: 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

Abstract translation: 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：US07532055B2

公开(公告)日：2009-05-12

申请号：US11980463

申请日：2007-10-31

Applicant: Janice Chiu ,  Hooman Darabi

Inventor： Janice Chiu ,  Hooman Darabi

IPC: G04F7/44

CPC classification number: H04L27/0002 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1475 ,  H03D2200/0084

Abstract: A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The double-balanced mixers include cross-coupled PMOS devices that dynamically inject current at zero-crossing points to cancel out tail currents in the mixers. Also, methods of operating the above-discussed receiver and receiver front end.

Abstract translation: 具有多个独立差分输入的接收器和接收器前端，多个独立的差分低噪声放大器和两组双平衡IQ混频器。 双平衡混频器包括跨耦合PMOS器件，其在过零点动态地注入电流以抵消混频器中的尾电流。 另外，操作上述接收机和接收机前端的方法。