公开(公告)号：US09143307B2

公开(公告)日：2015-09-22

申请号：US13688007

申请日：2012-11-28

Applicant: BROADCOM CORPORATION

Inventor： Mohyee Mikhemar ,  Hooman Darabi

IPC: H04L5/14

CPC classification number: H04L5/1461 ,  H04B1/525

Abstract: A circuit for a large-signal electrical balance duplexer (EBD) may include a circulator that can be configured to couple an output node of a transmit (TX) path to an antenna. An EBD circuit may be coupled to the circulator, at a first port of the EBD circuit. The EBD circuit may be configured to isolate the circulator from one or more input nodes of a receive (RX) path. An attenuator may be coupled between the output node of the TX path and a second port of the EBD circuit. The attenuator may be configured to provide an attenuated signal to the EBD circuit.

Abstract translation: 用于大信号电平衡双工器（EBD）的电路可以包括可被配置为将发射（TX）路径的输出节点耦合到天线的环行器。 EBD电路可以在EBD电路的第一端口耦合到环行器。 EBD电路可以被配置为将循环器与接收（RX）路径的一个或多个输入节点隔离。 衰减器可以耦合在TX路径的输出节点和EBD电路的第二端口之间。 衰减器可以被配置为向EBD电路提供衰减信号。

公开(公告)号：US09106416B2

公开(公告)日：2015-08-11

申请号：US14012098

申请日：2013-08-28

Applicant: BROADCOM CORPORATION

Inventor： Mohyee Mikhemar ,  Hooman Darabi

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

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

Abstract: A radio front end includes a power amplifier, a tone injection module, a duplexer, a balancing network, and a processor. 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 processor 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.

Abstract translation: 无线电前端包括功率放大器，音调注入模块，双工器，平衡网络和处理器。 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。 处理器可操作以确定组合信号的音调分量的幅度; 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：US08874057B2

公开(公告)日：2014-10-28

申请号：US13906928

申请日：2013-05-31

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

IPC: H04B7/00 ,  H04B1/16 ,  H04B1/18 ,  H04B1/30

CPC classification number: H04B1/16 ,  H04B1/18 ,  H04B1/30

Abstract: 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.

Abstract translation: 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：US08872593B2

公开(公告)日：2014-10-28

申请号：US13734805

申请日：2013-01-04

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  Hooman Darabi

IPC: G01R23/00 ,  H03B21/00 ,  G01L9/12 ,  G01R27/26 ,  G01R31/01 ,  H03K3/354

CPC classification number: H03B21/00 ,  G01L9/12 ,  G01R27/2605 ,  G01R31/016 ,  H03B5/20 ,  H03B5/32 ,  H03K3/0231 ,  H03K3/354

Abstract: A technique for calibration of on-chip resistance (R) and capacitance (C) values using an on-board bypass capacitor may include configuring an on-chip switch to selectively couple an on-chip calibration circuit to an on-chip port. The on-chip calibration circuit may include an RC oscillator having an RC time constant (RCTC). The on-board bypass capacitor may be coupled to the on-chip calibration circuit, by using the on-chip port. The on-chip R and C values may be calibrated using the on-chip calibration circuit and the on-board bypass capacitor.

Abstract translation: 使用板载旁路电容器来校准片上电阻（R）和电容（C）值的技术可以包括配置片内开关以选择性地将片上校准电路耦合到片上端口。 片上校准电路可以包括具有RC时间常数（RCTC）的RC振荡器。 板上旁路电容器可以通过使用片上端口耦合到片上校准电路。 片内R和C值可以使用片上校准电路和板载旁路电容进行校准。

公开(公告)号：US08868018B2

公开(公告)日：2014-10-21

申请号：US13769209

申请日：2013-02-15

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  David Murphy ,  Ahmad Mirzaei ,  Hooman Darabi

IPC: H04B1/10 ,  H04B10/69

CPC classification number: H04B1/10 ,  H04B1/1036 ,  H04B1/123 ,  H04B10/6973 ,  H04B2001/1063

Abstract: A system for cancellation of a reciprocal-mixing noise may comprise a down-converter mixer that may be configured to down convert a radio-frequency (RF) signal and to generate a baseband signal. The RF signal may include a desired signal and a blocker signal. A first signal path may be configured to receive the baseband signal and to generate a first signal. A second signal path may be configured to receive the baseband signal and to generate a second signal. A subtraction module may be configured to subtract the second signal from the first signal and to generate an output signal. The second signal may comprise the reciprocal-mixing noise, and the output signal may comprise the desired signal substantially free from the reciprocal-mixing noise.

Abstract translation: 用于消除互混混合噪声的系统可以包括可被配置为降低转换射频（RF）信号并产生基带信号的下变换器混频器。 RF信号可以包括期望的信号和阻塞信号。 第一信号路径可以被配置为接收基带信号并产生第一信号。 第二信号路径可以被配置为接收基带信号并产生第二信号。 减法模块可以被配置为从第一信号中减去第二信号并产生输出信号。 第二信号可以包括互易混合噪声，并且输出信号可以包括基本上没有互易混合噪声的期望信号。

公开(公告)号：US08712361B1

公开(公告)日：2014-04-29

申请号：US13683896

申请日：2012-11-21

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  David Murphy ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04B1/12 ,  H04B1/109

Abstract: A method for reciprocal-mixing noise cancellation may include receiving, from a first mixer, a first signal comprising a wanted signal at a first frequency and a modulated signal at a second frequency. The modulated signal may be a product of a reciprocal-mixing of an unwanted signal with a phase noise. The second frequency may be greater than the first frequency, and at least a portion of the modulated signal may overlap the wanted signal, adding a reciprocal-mixing noise to the wanted signal. Using the first signal, a narrow second signal may be generated at a third frequency, twice the second frequency. At a second mixer, the second signal may be mixed with the first signal to generate a third signal. The third signal may be subtracted from the first signal to remove a reciprocal-mixing noise and to generate the wanted signal at the first frequency without the reciprocal-mixing noise.

Abstract translation: 用于相互混合噪声消除的方法可以包括从第一混频器接收包括第一频率的有用信号的第一信号和以第二频率调制的信号。 调制信号可以是不想要的信号与相位噪声的互相混合的乘积。 第二频率可以大于第一频率，并且调制信号的至少一部分可以与有用信号重叠，将有用信号的互易混合噪声相加。 使用第一信号，可以以第三频率产生窄的第二信号，是第二频率的两倍。 在第二混频器中，第二信号可以与第一信号混合以产生第三信号。 可以从第一信号中减去第三信号以去除倒数混合噪声，并在第一频率下产生有用信号而没有互易混合噪声。

公开(公告)号：US09160388B2

公开(公告)日：2015-10-13

申请号：US13719076

申请日：2012-12-18

Applicant: BROADCOM CORPORATION

Inventor： Mohyee Mikhemar ,  Hooman Darabi

IPC: H04B1/06 ,  H04B1/16 ,  H03D7/14 ,  H03F1/08 ,  H03F3/45 ,  H04B1/00

CPC classification number: H04B1/16 ,  H03D7/1441 ,  H03D7/1466 ,  H03F1/086 ,  H03F3/45179 ,  H03F2203/45306 ,  H04B1/0003 ,  Y10T29/49117

Abstract: A circuit for a low-power and blocker-tolerant mixer-amplifier stage may include a complementary mixer formed by transmission gates having complementary structures. The complementary mixer may be configured to receive one or more radio-frequency (RF) signals and to convert the one or more RF signals to intermediate frequency (IF) current signals. A complementary TIA may be coupled to the complementary mixer and may be configured to receive the IF current signals and provide IF voltage signals. The complementary TIA may be formed by coupling an NMOS-TIA and a PMOS-TIA to a common load. A first portion of the complementary mixer may be coupled to the NMOS-TIA and a second portion of the complementary mixer may be coupled to the PMOS-TIA.

Abstract translation: 用于低功率和容阻型混频器 - 放大器级的电路可以包括由具有互补结构的传输门形成的互补混频器。 互补混频器可以被配置为接收一个或多个射频（RF）信号并将一个或多个RF信号转换成中频（IF）电流信号。 互补TIA可以耦合到互补混频器，并且可以被配置为接收IF电流信号并提供IF电压信号。 可以通过将NMOS-TIA和PMOS-TIA耦合到公共负载来形成互补TIA。 互补混频器的第一部分可以耦合到NMOS-TIA，并且互补混频器的第二部分可以耦合到PMOS-TIA。

公开(公告)号：US08830881B2

公开(公告)日：2014-09-09

申请号：US13715893

申请日：2012-12-14

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  Hooman Darabi

IPC: H04L5/14 ,  H04B1/44 ,  H01Q1/50

CPC classification number: H01Q1/50 ,  H03H7/38 ,  H03H7/463 ,  H04B1/44 ,  H04B1/525 ,  H04L5/14

Abstract: A circuit for a wideband electrical balance duplexer (EBD) may include a first impedance element and a second impedance coupled between a first and a second node and a second and a third node of the bridge circuit, respectively. An antenna may be coupled between the first and a fourth node of the bridge circuit to receive and transmit RF signals. A balancing network may provide an impedance substantially matching an impedance of the antenna. The balancing network may be coupled between the third and the fourth node of the bridge circuit. The first or the second impedance elements may facilitate balancing the bridge circuit. One or more output nodes of a transmit path may be coupled to an input node of the bridge circuit. One or more input nodes of a receive path may be coupled between the second and the fourth node of the bridge circuit.

Abstract translation: 用于宽带电平衡双工器（EBD）的电路可以分别包括耦合在第一和第二节点与桥接电路的第二和第三节点之间的第一阻抗元件和第二阻抗。 天线可以耦合在桥接电路的第一和第四节点之间以接收和发射RF信号。 平衡网络可以提供基本上匹配天线的阻抗的阻抗。 平衡网络可以耦合在桥接电路的第三和第四节点之间。 第一或第二阻抗元件可以有助于桥接电路的平衡。 发射路径的一个或多个输出节点可以耦合到桥接电路的输入节点。 接收路径的一个或多个输入节点可以耦合在桥接电路的第二和第四节点之间。

公开(公告)号：US20140153619A1

公开(公告)日：2014-06-05

申请号：US13718378

申请日：2012-12-18

Applicant: BROADCOM CORPORATION

Inventor： Rahul Magoon ,  Michael (Meng-An) Pan ,  Ahmad Mirzaei ,  Mohyee Mikhemar

IPC: H04B1/40 ,  H04B1/04

CPC classification number: H04B1/0458 ,  H03F3/195 ,  H03F3/245 ,  H03F3/45475 ,  H03F2203/45548

Abstract: A transceiver circuit including a digital-to-analog converter, a filter coupled to the digital-to-analog converter, a passive mixer coupled to the filter, via a buffer and a multi-stage power amplifier coupled to the passive mixer via a passive amplifier. A transmitter and method for amplifying a RF signal for transmission are also provided.

Abstract translation: 包括数模转换器，耦合到数模转换器的滤波器，经由缓冲器耦合到滤波器的无源混频器和经无源器件耦合到无源混频器的多级功率放大器的收发器电路 放大器 还提供了用于放大用于传输的RF信号的发射机和方法。

公开(公告)号：US20140057584A1

公开(公告)日：2014-02-27

申请号：US13863057

申请日：2013-04-15

Applicant: Broadcom Corporation

Inventor： David Murphy ,  Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC: H04B1/16

CPC classification number: H04B1/16 ,  H04B1/30

Abstract: 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.

Abstract translation: 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。