公开(公告)号：US20140155013A1

公开(公告)日：2014-06-05

申请号：US13734863

申请日：2013-01-04

Applicant: BROADCOM CORPORATION

Inventor： David MURPHY ,  Hooman Darabi

IPC: H04B1/10

CPC classification number: H04B1/109 ,  H03F1/0277 ,  H03F3/195 ,  H03F3/211 ,  H03F3/45475 ,  H03F3/72 ,  H03F2200/294 ,  H03F2203/45512 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/7215 ,  H03F2203/7236

Abstract: A circuit for baseband harmonic rejection includes multiple transconductance cells coupled to one another at outputs of the transconductance cells and configured to receive down-converted signals that vary from one another to produce a weighted current signal proportional to a voltage corresponding to a respective down-converted signal. The circuit also includes a feedback impedance coupled between an input of one of the transconductance cells and the outputs of the transconductance cells. Each of the transconductance cells has an effective transconductance of a first magnitude for frequency components of the down-converted signal arising from a first harmonic and an effective transconductance of a second magnitude less than the first magnitude for frequency components of the down-converted signal arising from harmonics at integer multiples of the first harmonic.

Abstract translation: 用于基带谐波抑制的电路包括在跨导单元的输出处彼此耦合的多个跨导单元，并被配置为接收彼此变化的下变频信号，以产生与对应于相应的下变频的电压成比例的加权电流信号 信号。 电路还包括耦合在跨导单元之一的输入和跨导单元的输出之间的反馈阻抗。 每个跨导单元对于由第一谐波产生的下变频信号的频率分量和对于下变频信号的频率分量的小于第一幅度的第二幅度的有效跨导，具有第一幅度的有效跨导 从谐波在整数倍的一次谐波。

公开(公告)号：US20140141739A1

公开(公告)日：2014-05-22

申请号：US13681316

申请日：2012-11-19

Applicant: BROADCOM CORPORATION

Inventor： Mohyee MIKHEMAR ,  David MURPHY ,  Hooman DARABI

IPC: H04B17/00

CPC classification number: H04B17/0055 ,  H04B17/11 ,  H04B17/345

Abstract: A circuit for measurement of a phase noise of an oscillator may include the oscillator to generate a first signal having the same oscillation frequency as an instantaneous oscillation frequency of the oscillator. The circuit may include a first circuit that is configured to generate a second signal from the first signal. An instantaneous amplitude of the second signal may be related to the oscillation frequency of the first signal. A second circuit may be configured to integrate the second signal to generate a third signal. The third signal can be a measure of the phase noise of the oscillator. The third signal can be used to cancel some or all of the phase noise of the oscillator.

Abstract translation: 用于测量振荡器的相位噪声的电路可以包括振荡器以产生具有与振荡器的瞬时振荡频率相同的振荡频率的第一信号。 电路可以包括被配置为从第一信号产生第二信号的第一电路。 第二信号的瞬时振幅可以与第一信号的振荡频率有关。 第二电路可以被配置为对第二信号进行积分以产生第三信号。 第三个信号可以是振荡器的相位噪声的量度。 第三个信号可用于消除振荡器的一些或全部相位噪声。

公开(公告)号：US20140171006A1

公开(公告)日：2014-06-19

申请号：US13736895

申请日：2013-01-08

Applicant: BROADCOM CORPORATION

Inventor： David MURPHY ,  Hooman DARABI

IPC: H04B1/10

CPC classification number: H04B1/1081 ,  H03D7/18 ,  H04B1/10 ,  H04B15/06

Abstract: A radio frequency (RF) noise-cancelling receiver includes first transconductance cells configured to produce respective weighted current signals proportional to an input voltage signal. The RF receiver includes frequency conversion cells coupled to the first transconductance cells and configured to mix the weighted current signals with a plurality of non-overlapping local oscillator (LO) signals to produce downconverted current signals. The RF receiver includes transimpedance amplifiers coupled to the frequency conversion cells and configured to produce output voltage signals proportional to the downconverted current signals. The transimpedance amplifiers include second transconductance cells. Each of the first and second transconductance cells has an effective transconductance of a first magnitude for frequency components of the input voltage signal arising from a first harmonic and an effective transconductance of a second magnitude less than the first magnitude for frequency components of the input voltage signal arising from harmonics at integer multiples of the first harmonic.

Abstract translation: 射频（RF）噪声消除接收机包括被配置为产生与输入电压信号成比例的各个加权电流信号的第一跨导单元。 RF接收机包括耦合到第一跨导单元的频率转换单元，并且被配置为将加权的电流信号与多个非重叠的本地振荡器（LO）信号混合以产生下变频的电流信号。 RF接收机包括耦合到频率转换单元并被配置为产生与下变频电流信号成比例的输出电压信号的跨阻放大器。 跨阻放大器包括第二跨导电池。 第一和第二跨导单元中的每一个具有针对由第一谐波产生的输入电压信号的频率分量的第一幅度的有效跨导和小于输入电压信号的频率分量的第一幅度的第二幅度的有效跨导 由一次谐波的整数倍的谐波产生。

公开(公告)号：US20160043757A1

公开(公告)日：2016-02-11

申请号：US14920455

申请日：2015-10-22

Applicant: Broadcom Corporation

Inventor： Ahmadreza ROFOUGARAN ,  Hooman DARABI ,  David MURPHY

IPC: H04B1/10

CPC classification number: H04B1/1036 ,  H04B1/10

Abstract: Because of associated disadvantages of narrow-band off-chip radio-frequency (RF) filtering, a mixer-first receiver front-end designed to tolerate blockers with minimal gain compression and noise factor degradation is disclosed. The mixer-first receiver front-end includes two separate down-conversion paths that help to minimize added noise and voltage gain prior to baseband filtering, which are critical factors in eliminating narrow-band off-chip RF filtering.

Abstract translation: 由于窄带片外射频（RF）滤波的相关缺点，公开了设计用于容忍具有最小增益压缩和噪声因子降级的阻塞器的混频器优先接收机前端。 混频器第一接收机前端包括两个单独的下变频路径，有助于在基带滤波之前最大限度地减少附加噪声和电压增益，这是消除窄带片外RF滤波的关键因素。

公开(公告)号：US20150236736A1

公开(公告)日：2015-08-20

申请号：US14702609

申请日：2015-05-01

Applicant: Broadcom Corporation

Inventor： David MURPHY ,  Hooman Darabi

IPC: H04B1/10 ,  H04B15/06

CPC classification number: H04B1/1081 ,  H03D7/18 ,  H04B1/10 ,  H04B15/06

Abstract: A radio frequency (RF) noise-cancelling receiver includes first transconductance cells configured to produce respective weighted current signals proportional to an input voltage signal. The RF receiver includes frequency conversion cells coupled to the first transconductance cells and configured to mix the weighted current signals with a plurality of non-overlapping local oscillator (LO) signals to produce downconverted current signals. The RF receiver includes transimpedance amplifiers coupled to the frequency conversion cells and configured to produce output voltage signals proportional to the downconverted current signals. The transimpedance amplifiers include second transconductance cells. Each of the first and second transconductance cells has an effective transconductance of a first magnitude for frequency components of the input voltage signal arising from a first harmonic and an effective transconductance of a second magnitude less than the first magnitude for frequency components of the input voltage signal arising from harmonics at integer multiples of the first harmonic.

Abstract translation: 射频（RF）噪声消除接收机包括被配置为产生与输入电压信号成比例的各个加权电流信号的第一跨导单元。 RF接收机包括耦合到第一跨导单元的频率转换单元，并且被配置为将加权的电流信号与多个非重叠的本地振荡器（LO）信号混合以产生下变频的电流信号。 RF接收机包括耦合到频率转换单元并被配置为产生与下变频电流信号成比例的输出电压信号的跨阻放大器。 跨阻放大器包括第二跨导电池。 第一和第二跨导单元中的每一个具有针对由第一谐波产生的输入电压信号的频率分量的第一幅度的有效跨导和小于输入电压信号的频率分量的第一幅度的第二幅度的有效跨导 由一次谐波的整数倍的谐波产生。

公开(公告)号：US20140073280A1

公开(公告)日：2014-03-13

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

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。