公开(公告)号：US20110299634A1

公开(公告)日：2011-12-08

申请号：US13076236

申请日：2011-03-30

申请人： Ahmad Mirzaei ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： H04L27/06

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

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 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.

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。

公开(公告)号：US08049568B2

公开(公告)日：2011-11-01

申请号：US12557149

申请日：2009-09-10

申请人： Michael Youssef ,  Ahmad Mirzaei ,  Hooman Darabi

发明人： Michael Youssef ,  Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： H03L7/085 ,  H03L7/06

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：US07924095B2

公开(公告)日：2011-04-12

申请号：US12458630

申请日：2009-07-17

申请人： Ahmad Yazdi ,  Ahmad Mirzaei ,  Hooman Darabi

发明人： Ahmad Yazdi ,  Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： H03F3/45

CPC分类号： H03F3/45183 ,  H03F3/4565 ,  H03F2203/45008 ,  H03F2203/45082 ,  H03F2203/45406 ,  H03F2203/45692

摘要： An operational amplifier is provided. The operational amplifier includes a first transistor configured to receive a first input voltage, a second transistor configured to receive a second input voltage, and a current steering module coupled to first and second transistors and configured to receive a reference voltage. The first and second transistors form a differential pair. The first transistor, second transistor, and current steering module are configured such that a current is steered from the current steering module or to the current steering module based on common-mode voltages of the first and second input voltages and the reference voltage to set a common-mode output voltage of the operational amplifier.

摘要翻译： 提供运算放大器。 运算放大器包括被配置为接收第一输入电压的第一晶体管，被配置为接收第二输入电压的第二晶体管，以及耦合到第一和第二晶体管并被配置为接收参考电压的电流导向模块。 第一和第二晶体管形成差分对。 第一晶体管，第二晶体管和电流转向模块被配置成使得电流基于第一和第二输入电压和参考电压的共模电压被转向从当前转向模块或当前转向模块，以将 运算放大器的共模输出电压。

公开(公告)号：US07902917B2

公开(公告)日：2011-03-08

申请号：US12505140

申请日：2009-07-17

申请人： Ahmad Mirzaei ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Hooman Darabi

IPC分类号： H03K5/00

CPC分类号： H03H7/12 ,  H03H1/02 ,  H03H11/04 ,  H03H11/0427 ,  H03H2250/00 ,  H03M1/661

摘要： Embodiments of the present invention relate generally to reconstruction filtering. In particular, embodiments enable highly linear, highly programmable, and easily reconfigurable reconstruction filters. Further, embodiments provide substantial power consumption, area, and cost savings compared to conventional solutions. For example, embodiments use all-passive filtering and substantially reduce active elements compared to conventional solutions. As a result, significant reductions in required area, noise, and power consumption can be achieved. In addition, embodiments perform filtering solely in the current domain, thereby eliminating the non-linear voltage-to-current conversion used in conventional circuits and enabling highly linear filtering. Furthermore, embodiments are highly programmable and easily reconfigurable without the use of tunable capacitors. As such, embodiments are very suitable solutions for multi-band multi-mode wireless transmitters.

摘要翻译： 本发明的实施例一般涉及重建过滤。 具体地，实施例使得能够实现高度线性，高度可编程且易于重构的重构滤波器。 此外，与传统解决方案相比，实施例提供了大量的功耗，面积和成本节约。 例如，与常规解决方案相比，实施例使用全无源滤波并且基本上减少有源元件。 因此，可以实现所需面积，噪声和功耗的显着降低。 此外，实施例仅在当前领域中执行滤波，从而消除在常规电路中使用的非线性电压 - 电流转换并且实现高度线性滤波。 此外，实施例是高度可编程的并且在不使用可调谐电容器的情况下容易重新配置。 因此，实施例是用于多频带多模式无线发射机的非常合适的解决方案。

公开(公告)号：US20100303172A1

公开(公告)日：2010-12-02

申请号：US12473571

申请日：2009-05-28

申请人： Alireza Zolfaghari ,  Hooman Darabi ,  Ahmad Mirzaei

发明人： Alireza Zolfaghari ,  Hooman Darabi ,  Ahmad Mirzaei

IPC分类号： H04L27/20 ,  H04L27/00

CPC分类号： H04L27/0008 ,  H04B1/0475

摘要： 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.

摘要翻译： 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：US20090189687A1

公开(公告)日：2009-07-30

申请号：US12020132

申请日：2008-01-25

申请人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

IPC分类号： H04B1/10 ,  H03F3/04 ,  H03M1/66

CPC分类号： H03H11/0466

摘要： 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.

摘要翻译： 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

申请人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Alireza Zolfaghari ,  Hooman Darabi

IPC分类号： H04B1/40

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：US07522898B2

公开(公告)日：2009-04-21

申请号：US11142690

申请日：2005-06-01

申请人： Mohammad E Heidari ,  Ahmad Mirzaei ,  Masoud Djafari ,  Mike Choi ,  Filipp A Baron ,  Alireza Mehrnia ,  Rahim Bagheri

发明人： Mohammad E Heidari ,  Ahmad Mirzaei ,  Masoud Djafari ,  Mike Choi ,  Filipp A Baron ,  Alireza Mehrnia ,  Rahim Bagheri

IPC分类号： H04B7/00

CPC分类号： H03L7/183 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1483 ,  H03D7/165 ,  H03D2200/0043 ,  H03L7/0891

摘要： Embodiments of the present invention include a frequency synthesizer comprising a first plurality of dividers receiving a first signal having a first frequency and generating a first plurality of divided signals and a frequency combination network including a plurality of mixers, the frequency combination network receiving one or more of the first plurality of divided signals and generating a plurality of synthesized signals having different frequencies. The frequency combination network may further include additional dividers and multiplexers for more flexibility in synthesizing different frequencies. In one embodiment, the frequency combination network is coupled to dividers in the feedback path of a phase locked loop. The present invention is particularly advantageous for synthesizing frequencies above one (1) gigahertz.

摘要翻译： 本发明的实施例包括频率合成器，其包括接收具有第一频率的第一信号和产生第一多个分频信号的第一多个分频器和包括多个混频器的频率组合网络，所述频率组合网络接收一个或多个 并产生具有不同频率的多个合成信号。 频率组合网络还可以包括附加的分频器和多路复用器，用于在合成不同频率时更灵活。 在一个实施例中，频率组合网络耦合到锁相环的反馈路径中的分频器。 本发明特别有利于合成高于一（1）吉赫兹的频率。

公开(公告)号：US20080122529A1

公开(公告)日：2008-05-29

申请号：US11501382

申请日：2006-08-09

申请人： Rahim Bagheri ,  Ahmad Mirzaei

发明人： Rahim Bagheri ,  Ahmad Mirzaei

IPC分类号： H04B1/10

CPC分类号： H03H15/02

摘要： Embodiments of the present invention include programmable filter circuits and methods. In one embodiment, the present invention includes a programmable filter for filtering an input signal comprising a storage element for storing a plurality of digital values representing a discrete time window function, and a plurality of filter channels, each channel comprising a multiplying digital-to-analog converter having a plurality of digital inputs coupled to the storage element and an analog input for receiving said input signal to be filtered, at least one capacitor having at least one terminal coupled to an output of the multiplying digital-to-analog converter, and a sampling device coupled between the at least one terminal of the at least one capacitor and an output of the filter. In another embodiment, the present invention includes a software defmed radio.

摘要翻译： 本发明的实施例包括可编程滤波器电路和方法。 在一个实施例中，本发明包括一个可编程滤波器，用于对输入信号进行滤波，该输入信号包括用于存储表示离散时间窗函数的多个数字值的存储元件和多个滤波器通道，每个通道包括乘法数字 - 模拟转换器，其具有耦合到存储元件的多个数字输入端和用于接收要滤波的所述输入信号的模拟输入端，至少一个电容器，其至少一个端子耦合到乘法数模转换器的输出端，以及 耦合在所述至少一个电容器的所述至少一个端子和所述滤波器的输出端之间的采样装置。 在另一个实施例中，本发明包括一个软件无线电装置。

公开(公告)号：US08884704B2

公开(公告)日：2014-11-11

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： H03L7/087 ,  H03L7/02 ,  H03L7/07 ,  H03L7/099

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。