公开(公告)号：US20140235191A1

公开(公告)日：2014-08-21

申请号：US13897306

申请日：2013-05-17

Applicant: Broadcom Corporation

Inventor： Mohyee MIKHEMAR ,  David Murphy ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04B15/06 ,  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. One or more portions of the modulated signal may overlap the wanted signal, adding a reciprocal-mixing noise to the wanted signal. A second signal may be generated by mixing, at a second mixer, the first signal with a third signal, which is at a third frequency related to a blocker offset frequency. A gain may be applied to the second signal to generate an amplified second signal that may be subtracted from the first signal to generate a fourth signal. The fourth signal may be filtered 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。 调制信号的一个或多个部分可能与有用信号重叠，向有用信号添加互易混合噪声。 第二信号可以通过在第二混合器处将第一信号与第三信号混合来产生，第三信号是与阻塞偏移频率相关的第三频率。 可以将增益应用于第二信号以产生可以从第一信号中减去的放大的第二信号，以产生第四信号。 可以对第四信号进行滤波，以在第一频率下产生有用信号，而不会产生相互混合噪声。

公开(公告)号：US08761300B2

公开(公告)日：2014-06-24

申请号：US13688678

申请日：2012-11-29

Applicant: Broadcom Corporation

Inventor： Ahmad Mirzaei ,  Hooman Darabi

IPC: H04L27/00

CPC classification number: H03K5/1532 ,  G01R21/01 ,  H03G3/3042 ,  H04B1/04

Abstract: According to one embodiment, a peak detector having extended dynamic range comprises a first differential output coupled to a supply voltage of the peak detector by a first load and coupled to ground by first and second switching devices, and a second differential output coupled to the supply voltage by a second load and coupled to ground by third and fourth switching devices. The control terminals of the first, second, third, and fourth switching devices receive a common bias voltage, and the respective first and second control terminals are configured as differential inputs of the peak detector. In some embodiments, corresponding first power terminals of the first and second switching devices share a first common node further shared by the first differential output, and corresponding first power terminals of the third and fourth switching devices share a second common node further shared by the second differential output.

Abstract translation: 根据一个实施例，具有扩展动态范围的峰值检测器包括第一差分输出，其通过第一负载耦合到峰值检测器的电源电压，并由第一和第二开关器件耦合到地，以及耦合到电源的第二差分输出 电压由第二负载耦合并由第三和第四开关装置耦合到地。 第一，第二，第三和第四开关器件的控制端子接收公共偏置电压，并且相应的第一和第二控制端子被配置为峰值检测器的差分输入。 在一些实施例中，第一和第二开关器件的对应的第一电源端子共享由第一差分输出进一步共享的第一公共节点，并且第三和第四开关器件的对应的第一电源端子共享第二公共节点， 差分输出。

公开(公告)号：US20140141741A1

公开(公告)日：2014-05-22

申请号：US13683896

申请日：2012-11-21

Applicant: BROADCOM CORPORATION

Inventor： Mohyee MIKHEMAR ,  David Murphy ,  Hooman Darabi

IPC: H04B1/12

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能与有用信号重叠，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：US20140140455A1

公开(公告)日：2014-05-22

申请号：US14163994

申请日：2014-01-24

Applicant: BROADCOM CORPORATION

Inventor： Ahmad Mirzaei ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04B1/10 ,  H03F1/083 ,  H03F3/45179 ,  H04B1/006 ,  H04B1/1638 ,  H04B1/28 ,  H04B1/401

Abstract: A SAW-less receiver includes an interface, 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), a Low Noise Amplifier (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 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. Filtering may be prior or after amplification by the LNA.

Abstract translation: 无SAW接收机包括接口，RF到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），低噪声放大器（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。 过滤可能在LNA扩增之前或之后。

公开(公告)号：US20130281024A1

公开(公告)日：2013-10-24

申请号：US13925161

申请日：2013-06-24

Applicant: BROADCOM CORPORATION

Inventor： Ahmadreza (Reza) Rofougaran ,  Maryam Rofougaran ,  Brima B. Ibrahim ,  Hooman Darabi

IPC: H04B15/00

CPC classification number: H04B15/00 ,  G06F1/1626 ,  G06F1/1643 ,  G06F1/1698 ,  G06F3/017 ,  H04B7/15507

Abstract: A portable computing device includes a radio frequency (RF) wired link, a core module, and a plurality of multi-mode RF units. When one or more of the multi-mode RF units are supporting a high-speed data communication, the core module is operable to detect a blocker that is adversely affecting the high-speed data communication. The core module is further operable to determine whether a radiation pattern alternative for the high-speed data communication will reduce the adverse affects on the high-speed data communication. When the radiation pattern alternative for the high-speed data communication will reduce the adverse affects on the high-speed data communication, the core module is further operable to enable the radiation pattern alternative. The one or more multi-mode RF units are operable to adjust at least one of transmission and reception of the high-speed data communication in accordance with the radiation pattern alternative.

Abstract translation: 便携式计算设备包括射频（RF）有线链路，核心模块和多个多模RF单元。 当一个或多个多模RF单元支持高速数据通信时，核心模块可操作以检测对高速数据通信有不利影响的阻塞器。 核心模块还可操作以确定用于高速数据通信的辐射模式替代方案是否将减少对高速数据通信的不利影响。 当用于高速数据通信的辐射模式替代方案将减少对高速数据通信的不利影响时，核心模块进一步可操作以使辐射模式可选。 所述一个或多个多模式RF单元可操作以根据所述辐射模式替代来调整所述高速数据通信的发送和接收中的至少一个。

公开(公告)号：US20130267183A1

公开(公告)日：2013-10-10

申请号：US13906928

申请日：2013-05-31

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

IPC: H04B1/16

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：US20130259172A1

公开(公告)日：2013-10-03

申请号：US13901390

申请日：2013-05-23

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  Amir Hadji-Abdolhamid ,  Hooman Darabi

IPC: H03G3/32

CPC classification number: H03H11/1217 ,  H03F1/0205 ,  H03F1/086 ,  H03F3/19 ,  H03F3/45076 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/91 ,  H03F2203/45332 ,  H03F2203/45336 ,  H03G1/0005 ,  H03G1/0029 ,  H03G3/3068 ,  H03G3/32 ,  H03H11/1252 ,  H03H11/1256 ,  H03H11/1291 ,  H03H2210/025 ,  H04B1/123 ,  H04B1/16 ,  H04L25/06

Abstract: According to one embodiment, a compact low-power receiver comprises first and second analog circuits connected by a digitally controlled interface circuit. The first analog circuit has a first direct-current (DC) offset and a first common mode voltage at an output, and the second analog circuit has a second DC offset and a second common mode voltage at an input. The digitally controlled interface circuit connects the output to the input, and is configured to match the first and second DC offsets and to match the first and second common mode voltages. In one embodiment, the first analog circuit is a variable gain control transimpedance amplifier (TIA) implemented using a current mode buffer, the second analog circuit is a second-order adjustable low-pass filter, whereby a three-pole adjustable low-pass filter in the compact low-power receiver is effectively produced.

Abstract translation: 根据一个实施例，紧凑型低功率接收机包括由数字控制接口电路连接的第一和第二模拟电路。 第一模拟电路在输出处具有第一直流（DC）偏移和第一共模电压，并且第二模拟电路在输入端具有第二直流偏移和第二共模电压。 数字控制接口电路将输出连接到输入，并且被配置为匹配第一和第二DC偏移并且匹配第一和第二共模电压。 在一个实施例中，第一模拟电路是使用电流模式缓冲器实现的可变增益控制跨阻抗放大器（TIA），第二模拟电路是二阶可调低通滤波器，由此三极可调低通滤波器 在紧凑型低功率接收机中有效生产。