公开(公告)号：US20120238232A1

公开(公告)日：2012-09-20

申请号：US13050570

申请日：2011-03-17

申请人： David Murphy ,  Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

发明人： David Murphy ,  Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/26

CPC分类号： H04B1/16 ,  H04B1/30

摘要： Aspects of a method and system for a low-noise, highly-linear receiver front-end are provided. In this regard, a received signal may be processed via one or more transconductances, one or more transimpedance amplifiers (TIAs), and one or more mixers to generate a first baseband signal corresponding to a voltage at a node of the receiver, and a second baseband signal corresponding to a current at the node of the receiver. The first signal and the second signal may be processed to recover information from the received signal. The first signal may be generated via a first one or more signal paths of the receiver and the second signal may be generated via a second one or more signal paths of the receiver.

摘要翻译： 提供了一种用于低噪声，高线性接收机前端的方法和系统。 在这方面，可以经由一个或多个跨导，一个或多个跨阻抗放大器（TIAs）和一个或多个混频器来处理接收的信号，以产生对应于接收机的节点处的电压的第一基带信号，以及第二 对应于接收机节点处的电流的基带信号。 可以处理第一信号和第二信号以从接收的信号中恢复信息。 可以经由接收机的第一个或多个信号路径生成第一信号，并且可以经由接收机的第二个一个或多个信号路径来生成第二信号。

公开(公告)号：US20120021713A1

公开(公告)日：2012-01-26

申请号：US12804396

申请日：2010-07-20

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/16 ,  H03F3/16

CPC分类号： H04B1/18 ,  H03F1/223 ,  H03F1/565 ,  H03F3/193 ,  H03F2200/222 ,  H03F2200/294

摘要： According to one embodiment, a concurrent impedance and noise matching transconductance amplifier designed for implementation in a receiver comprises an input device configured to couple to a matching network of the receiver, and a boost capacitor connected to the input device to increase an input capacitance of the transconductance amplifier. The boost capacitor is selected to substantially minimize the receiver noise and to enable the concurrent impedance and noise matching of the receiver and the matching network. In one embodiment, the receiver comprises the transconductance amplifier to provide an amplified receive signal, and a mixer to produce a down-converted signal corresponding to the amplified receive signal, wherein the mixer is coupled to the transconductance amplifier by a blocking capacitor. The blocking capacitor is selected to substantially increase an amplitude ratio of the down-converted signal to the amplified receive signal to substantially increase the front-end gain of the receiver.

摘要翻译： 根据一个实施例，设计用于在接收机中实现的并发阻抗和噪声匹配跨导放大器包括被配置为耦合到接收器的匹配网络的输入设备和连接到输入设备的升压电容器，以增加输入设备的输入电容 跨导放大器 升压电容器被选择为基本上最小化接收器噪声并且使得接收器和匹配网络的并发阻抗和噪声匹配成为可能。 在一个实施例中，接收机包括跨导放大器以提供放大的接收信号，以及混频器以产生对应于放大的接收信号的下变频信号，其中混频器通过阻塞电容器耦合到跨导放大器。 选择阻塞电容器以大大增加经降频转换的信号与放大的接收信号的幅度比，以显着增加接收机的前端增益。

公开(公告)号：US20120021699A1

公开(公告)日：2012-01-26

申请号：US12804399

申请日：2010-07-20

申请人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

发明人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

IPC分类号： H04B1/40 ,  H04B7/00

CPC分类号： H04B1/16 ,  H04B1/18 ,  H04B1/30

摘要： According to one embodiment, a compact low-power receiver comprises a front-end producing a front-end gain and a back-end producing a back-end gain. The front-end includes a transconductance amplifier providing digital gain control and outputting an amplified receive signal, a mixer for generating a down-converted signal from the amplified receive signal, and a transimpedance amplifier (TIA) including a current mode buffer. The TIA provides gain control for amplifying the down-converted signal to produce a front-end output signal. In one embodiment, the back end includes a second-order low-pass filter to produce a filtered signal from the front-end output signal and an analog-to-digital converter (ADC), wherein the filtered signal is fed directly to the ADC without direct-current (DC) offset cancellation being performed. In various embodiments, the front-end gain is substantially greater than the back-end gain.

摘要翻译： 根据一个实施例，紧凑型低功率接收机包括产生前端增益的前端和产生后端增益的后端。 前端包括提供数字增益控制和输出放大的接收信号的跨导放大器，用于从放大的接收信号产生下变频信号的混频器，以及包括电流模式缓冲器的跨阻抗放大器（TIA）。 TIA提供用于放大下变频信号以产生前端输出信号的增益控制。 在一个实施例中，后端包括从前端输出信号产生滤波信号的二阶低通滤波器和模数转换器（ADC），其中滤波后的信号被直接馈送到ADC 没有执行直流（DC）偏移消除。 在各种实施例中，前端增益基本上大于后端增益。

公开(公告)号：US20110300818A1

公开(公告)日：2011-12-08

申请号：US13076262

申请日：2011-03-30

申请人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04W88/02

CPC分类号： H03H7/40 ,  H03H19/008 ,  H04B2001/0491 ,  H04W88/02

摘要： A SAW-less transmitter includes an up-conversion mixing module, a frequency translated BPF (FTBPF), an output module, and a power amplifier driver. The up-conversion mixing module converts an outbound symbol stream into an up-converted signal. The FTBPF frequency translates a baseband filter response to an RF bandpass filter response and filter the up-converted signal in accordance with the RF bandpass filter response to produce a filtered up-converted signal. The output module conditions the filtered up-converted signal to produce a conditioned up-converted signal. The power amplifier driver amplifies the conditioned up-converted signal to produce an outbound RF signal.

摘要翻译： 无SAW发射机包括上变频混频模块，频率转换BPF（FTBPF），输出模块和功率放大器驱动器。 上变频混频模块将出站符号流转换为上变频信号。 FTBPF频率将基带滤波器响应转换为RF带通滤波器响应，并根据RF带通滤波器响应对上变频信号进行滤波，以产生滤波的上变频信号。 输出模块对滤波的上变频信号进行调节，以产生调节的上变频信号。 功率放大器驱动器放大经调节的上变频信号以产生出站RF信号。

公开(公告)号：US20110299435A1

公开(公告)日：2011-12-08

申请号：US12946050

申请日：2010-11-15

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B7/005

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

摘要： A radio front end includes a duplexer, a tunable balancing network, a detector module, and a processing module. The duplexer is operably coupled to an antenna and is operable to provide electrical isolation between an outbound wireless signal and an inbound wireless signal. The tunable balancing network is operably coupled to the duplexer and operable to establish an impedance that substantially matches an impedance of the antenna based on a tuning signal. The detector module is operable to generate an error signal based on an electrical performance characteristic of the duplexer. The processing module is operable to generate the tuning signal based on the error signal.

摘要翻译： 无线电前端包括双工器，可调平衡网络，检测器模块和处理模块。 双工器可操作地耦合到天线并且可操作以在出站无线信号和入站无线信号之间提供电隔离。 可调谐平衡网络可操作地耦合到双工器，并且可操作以基于调谐信号建立基本匹配天线的阻抗的阻抗。 检测器模块可操作以基于双工器的电性能特性产生误差信号。 处理模块可操作以基于误差信号产生调谐信号。

公开(公告)号：US09219596B2

公开(公告)日：2015-12-22

申请号：US12946050

申请日：2010-11-15

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/44 ,  H04L5/14 ,  H04B1/04 ,  H04B1/18 ,  H03H7/40 ,  H03F1/56 ,  H03F3/195 ,  H04B1/58 ,  H04B1/10

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

摘要： A radio front end includes a duplexer, a tunable balancing network, a detector module, and a processing module. The duplexer is operably coupled to an antenna and is operable to provide electrical isolation between an outbound wireless signal and an inbound wireless signal. The tunable balancing network is operably coupled to the duplexer and operable to establish an impedance that substantially matches an impedance of the antenna based on a tuning signal. The detector module is operable to generate an error signal based on an electrical performance characteristic of the duplexer. The processing module is operable to generate the tuning signal based on the error signal.

摘要翻译： 无线电前端包括双工器，可调平衡网络，检测器模块和处理模块。 双工器可操作地耦合到天线并且可操作以在出站无线信号和入站无线信号之间提供电隔离。 可调谐平衡网络可操作地耦合到双工器，并且可操作以基于调谐信号建立基本匹配天线的阻抗的阻抗。 检测器模块可操作以基于双工器的电性能特性产生误差信号。 处理模块可操作以基于误差信号产生调谐信号。

公开(公告)号：US08755762B2

公开(公告)日：2014-06-17

申请号：US12362894

申请日：2009-01-30

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/10

CPC分类号： H04B1/525

摘要： A radio frequency (RF) receiver includes an amplifier stage, a blocking module, and a down conversion module. The amplifier stage amplifies an inbound RF signal (includes a desired component and a blocking component) to produce an amplified inbound RF signal. The blocking module generates an oscillation corresponding to a frequency of the blocking component and filters the amplified inbound RF signal based on the oscillation to substantially attenuate the blocking component and to pass, substantially unattenuated, the desired component. The down conversion module converts the desired RF signal component into a baseband or near baseband inbound signal.

摘要翻译： 射频（RF）接收机包括放大器级，阻塞模块和下变频模块。 放大器级放大入站RF信号（包括期望的分量和阻塞分量）以产生放大的入站RF信号。 阻塞模块产生对应于阻挡分量的频率的振荡，并且基于振荡对放大的入站RF信号进行滤波，以基本上衰减阻塞分量并使基本上未衰减所需的分量。 下变频模块将期望的RF信号分量转换为基带或近基带入站信号。

公开(公告)号：US08665026B2

公开(公告)日：2014-03-04

申请号：US13419652

申请日：2012-03-14

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H03G3/00

CPC分类号： H03G1/0029

摘要： A gain control system may include an input terminal that receives an input signal. The gain control system may include a first transistor having a source connected with the input terminal and a drain connected with an output terminal. The gain control system may include a second transistor having a gate connected with the input terminal and the source of the first transistor. The second transistor may have a drain connected with the output terminal. The second transistor may generate a reduction signal. The output terminal may output an output signal based on the input signal and the reduction signal.

摘要翻译： 增益控制系统可以包括接收输入信号的输入端。 增益控制系统可以包括具有与输入端连接的源极的第一晶体管和与输出端连接的漏极。 增益控制系统可以包括具有与第一晶体管的输入端和源极连接的栅极的第二晶体管。 第二晶体管可以具有与输出端子连接的漏极。 第二晶体管可以产生还原信号。 输出端子可以基于输入信号和减小信号输出输出信号。

公开(公告)号：US08571489B2

公开(公告)日：2013-10-29

申请号：US12946724

申请日：2010-11-15

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/40

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

摘要： A radio front end includes a power amplifier, a tone injection module, a duplexer, a balancing network, and a processing module. The tone injection module is operable, in a first mode, to produce a tone having a carrier frequency that is substantially similar to a carrier frequency of an inbound wireless signal. The duplexer is operable, in the first mode, to provide electrical isolation between the outbound wireless signal and a combination signal of the tone and inbound wireless signal and is operable, in a second mode, to provide electrical isolation between the outbound wireless signal and the inbound wireless signal. The processing module is operable to determine an amplitude of a tone component of the combination signal; correlate the amplitude of the tone component to an inbound frequency band isolation; and adjust baseband processing of a down converted representation of the combination signal based on the inbound frequency band isolation.

摘要翻译： 无线电前端包括功率放大器，音调注入模块，双工器，平衡网络和处理模块。 音调注入模块在第一模式中可操作地产生具有与入站无线信号的载波频率基本相似的载波频率的音调。 双工器在第一模式中可操作地在出站无线信号和音调和入站无线信号的组合信号之间提供电隔离，并且在第二模式中可操作地提供出站无线信号和 入站无线信号。 处理模块可操作以确定组合信号的色调分量的幅度; 将音调分量的幅度与入站频带隔离相关; 并且基于入站频带隔离来调整组合信号的下变频表示的基带处理。

公开(公告)号：US20130241654A1

公开(公告)日：2013-09-19

申请号：US13419652

申请日：2012-03-14

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H03G3/00

CPC分类号： H03G1/0029

摘要： A gain control system may include an input terminal that receives an input signal. The gain control system may include a first transistor having a source connected with the input terminal and a drain connected with an output terminal. The gain control system may include a second transistor having a gate connected with the input terminal and the source of the first transistor. The second transistor may have a drain connected with the output terminal. The second transistor may generate a reduction signal. The output terminal may output an output signal based on the input signal and the reduction signal.

摘要翻译： 增益控制系统可以包括接收输入信号的输入端。 增益控制系统可以包括具有与输入端连接的源极的第一晶体管和与输出端连接的漏极。 增益控制系统可以包括具有与第一晶体管的输入端和源极连接的栅极的第二晶体管。 第二晶体管可以具有与输出端子连接的漏极。 第二晶体管可以产生还原信号。 输出端子可以基于输入信号和减小信号输出输出信号。