公开(公告)号：US20140171005A1

公开(公告)日：2014-06-19

申请号：US13719091

申请日：2012-12-18

Applicant: BROADCOM CORPORATION

Inventor： Mohyee MIKHEMAR ,  Amir HADJI-ABDOLHAMID ,  Hooman DARABI

IPC: H03F1/26 ,  H04B1/18 ,  H03G3/00

CPC classification number: H04B1/123 ,  H03F1/223 ,  H03F3/19 ,  H03F3/195 ,  H03F3/45179 ,  H03F3/45475 ,  H03F2200/165 ,  H03F2200/294 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2203/45394 ,  H03F2203/45512 ,  H03F2203/45528 ,  H03F2203/45631 ,  H03F2203/45686 ,  H03F2203/45702 ,  H03G3/00 ,  H03G3/18 ,  H03H7/0138 ,  H03H7/06 ,  H03H7/17 ,  H04B1/18

Abstract: A circuit for a low-noise interface between an amplifier and an analog-to-digital converter (ADC) may comprise a capacitor element having a capacitance of C coupled between a first and second output node of the amplifier. A first resistor R1 may be coupled in parallel with the capacitor. A second resistor R2 may be coupled between the first output node of the amplifier and a first input node of the ADC. A third resistor R3 may be coupled between the second output node of the amplifier and a second input node of the ADC. Initial values of the resistances R1, R2, and R3 may be selected to provide a desired value RL for a load resistance of the amplifier. A value of the capacitance C may be selected so that, in combination with the desired value RL, a desired bandwidth for the amplifier is achieved.

Abstract translation: 用于放大器和模数转换器（ADC）之间的低噪声接口的电路可以包括具有耦合在放大器的第一和第二输出节点之间的C电容的电容器元件。 第一电阻器R1可以与电容器并联耦合。 第二电阻器R2可以耦合在放大器的第一输出节点和ADC的第一输入节点之间。 第三电阻器R3可以耦合在放大器的第二输出节点和ADC的第二输入节点之间。 可以选择电阻R1，R2和R3的初始值来为放大器的负载电阻提供期望值RL。 可以选择电容C的值，使得结合期望值RL，实现放大器的期望带宽。

公开(公告)号：US20140169510A1

公开(公告)日：2014-06-19

申请号：US13719125

申请日：2012-12-18

Applicant: BROADCOM CORPORATION

Inventor： Mohyee MIKHEMAR ,  Hooman DARABI

IPC: H04B7/005

CPC classification number: H03F1/0205 ,  H03F1/565 ,  H03F3/19 ,  H03F3/211 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/21106 ,  H04B1/00 ,  H04B1/005 ,  H04B1/18

Abstract: A circuit for a receiver with reconfigurable low-power or wideband operation may comprise one or more main signal paths each coupled to a first port and including a low-noise amplifier (LNA) configured to provide a radio frequency (RF) signal to a main mixer circuit. An auxiliary signal path may be coupled to a second port. The auxiliary signal path may include an auxiliary mixer configured to provide an on-chip matching input impedance that may match an impedance of the antenna. The first port may be coupled to an RF antenna through an off-chip matching circuit, when a low-power operation is desired. The first port may be coupled to the second port and to the RF antenna, when a wideband operation is desired.

Abstract translation: 用于具有可重新配置的低功率或宽带操作的接收机的电路可以包括一个或多个主信号路径，每个主信号路径耦合到第一端口，并且包括低噪声放大器（LNA），低噪声放大器（LNA）被配置为提供射频（RF）信号到主 混频器电路。 辅助信号路径可以耦合到第二端口。 辅助信号路径可以包括配置成提供与天线的阻抗匹配的片上匹配输入阻抗的辅助混频器。 当需要低功率操作时，第一端口可以通过片外匹配电路耦合到RF天线。 当需要宽带操作时，第一端口可以耦合到第二端口和RF天线。

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。

公开(公告)号：US20130285764A1

公开(公告)日：2013-10-31

申请号：US13930812

申请日：2013-06-28

Applicant: Broadcom Corporation

Inventor： Mohyee MIKHEMAR ,  Hooman DARABI

IPC: H03H7/46 ,  H03H11/42

CPC classification number: H03H11/42 ,  H03H11/32 ,  H03H11/342 ,  H04B5/0093 ,  H04B2001/485

Abstract: An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes two transistors that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA). The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate.

Abstract translation: 本文介绍了使用回转器的片内发射机/接收机隔离的RF前端。 RF前端被配置为支持全双工通信，并且包括回转器和变压器。 回转器包括被配置为将低噪声放大器（LNA）的输入与功率放大器（PA）的输出隔离的两个晶体管。 回转器还被配置为将PA的输出与LNA的输入隔离。 回转器至少部分或完全能够集成在硅基基板上。