公开(公告)号：US08923492B2

公开(公告)日：2014-12-30

申请号：US13850355

申请日：2013-03-26

Applicant: Broadcom Corporation

Inventor： Hui Zheng ,  Sasi Kumar Arunachalam ,  Alex Jianzhong Chen ,  Aravind Kumar Padyana ,  I-Ning Ku ,  Jungwoo Song ,  Xicheng Jiang

IPC: H04M11/00

CPC classification number: H04M11/00 ,  H04M11/062

Abstract: A multi-mode line driver circuit designed to be fabricated in a CMOS process and capable of supporting a plurality of operating modes corresponding, for example, to different profiles of communication standards such as xDSL standards. The line driver circuit incorporates integrated mode switches with a two-stage amplifier architecture to relax amplifier requirements by distributing the signal gain into two amplifier stages. Reconfigurable feedback loops are provided to permit design optimization for particular modes of operation (e.g., ADSL and VDSL compliant modes). In one embodiment implemented as a Class-H amplifier, lift amplifier(s) are provided between a first amplifier stage and a second amplifier stage for controlling voltage supply levels of the second amplifier stage. The lift amplifiers may be enabled by voltage threshold detection circuitry that monitors either the input or the output signals of the first amplifier stage depending on the operable transmission mode.

Abstract translation: 设计为以CMOS工艺制造并能够支持多个操作模式的多模式线路驱动器电路，其例如对应于诸如xDSL标准的通信标准的不同简档。 线路驱动器电路集成了具有两级放大器架构的集成模式开关，通过将信号增益分配到两个放大器级来放大放大器要求。 提供可重构的反馈回路以允许针对特定操作模式（例如，ADSL和VDSL兼容模式）的设计优化。 在实现为H类放大器的一个实施例中，提升放大器设置在第一放大器级和第二放大级之间，用于控制第二放大级的电压电平。 升压放大器可以由电压阈值检测电路使能，电压阈值检测电路根据可操作的传输模式来监视第一放大器级的输入或输出信号。

公开(公告)号：US20140254779A1

公开(公告)日：2014-09-11

申请号：US13850355

申请日：2013-03-26

Applicant: BROADCOM CORPORATION

Inventor： Hui Zheng ,  Sasi Kumar Arunachalam ,  Alex Jianzhong Chen ,  Aravind Kumar Padyana ,  I-Ning Ku ,  Jungwoo Song ,  Xicheng Jiang

IPC: H04M11/00

CPC classification number: H04M11/00 ,  H04M11/062

Abstract: A multi-mode line driver circuit designed to be fabricated in a CMOS process and capable of supporting a plurality of operating modes corresponding, for example, to different profiles of communication standards such as xDSL standards. The line driver circuit incorporates integrated mode switches with a two-stage amplifier architecture to relax amplifier requirements by distributing the signal gain into two amplifier stages. Reconfigurable feedback loops are provided to permit design optimization for particular modes of operation (e.g., ADSL and VDSL compliant modes). In one embodiment implemented as a Class-H amplifier, lift amplifier(s) are provided between a first amplifier stage and a second amplifier stage for controlling voltage supply levels of the second amplifier stage. The lift amplifiers may be enabled by voltage threshold detection circuitry that monitors either the input or the output signals of the first amplifier stage depending on the operable transmission mode.

Abstract translation: 设计为以CMOS工艺制造并能够支持多个操作模式的多模式线路驱动器电路，其例如对应于诸如xDSL标准的通信标准的不同简档。 线路驱动器电路集成了具有两级放大器架构的集成模式开关，通过将信号增益分配到两个放大器级来放大放大器要求。 提供可重构的反馈回路以允许针对特定操作模式（例如，ADSL和VDSL兼容模式）的设计优化。 在实现为H类放大器的一个实施例中，提升放大器设置在第一放大器级和第二放大级之间，用于控制第二放大级的电压电平。 升压放大器可以由电压阈值检测电路使能，电压阈值检测电路根据可操作的传输模式来监视第一放大器级的输入或输出信号。

公开(公告)号：US20130064398A1

公开(公告)日：2013-03-14

申请号：US13655362

申请日：2012-10-18

Applicant: Broadcom Corporation

Inventor： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

IPC: H03F3/16 ,  H03F99/00 ,  H03F1/38

CPC classification number: H03F3/211 ,  H03F1/301 ,  H03F3/3022 ,  H03F2200/375 ,  H03F2200/453 ,  H03F2203/30015

Abstract: Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

Abstract translation: 公开了一种AB-B类放大器，其包括包括第一多个放大装置的第一输出级和包括第二多个放大装置的第二输出级。 根据一个实施例，当AB类/ B放大器处于静态时，第一输出级工作，而当AB类/ B放大器处于活动状态时，第二输出级工作。 AB类/ B放大器还包括一个电平移动电路，其调节第二输出级的控制电压，其中当AB类/ B放大器进入激活状态时，电平移位电路用于激活第二输出级。 AB类/ B放大器的实施例可以包括实现固定或信号相关电平移位的电平移位电路和基本上消除由复制偏置电路内部的有源反馈电路产生的任何系统偏移的静态控制电路。

公开(公告)号：US20130063214A1

公开(公告)日：2013-03-14

申请号：US13655339

申请日：2012-10-18

Applicant: Broadcom Corporation

Inventor： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

IPC: H03F1/38

CPC classification number: H03F3/211 ,  H03F1/301 ,  H03F3/3022 ,  H03F2200/375 ,  H03F2200/453 ,  H03F2203/30015

Abstract: Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

Abstract translation: 公开了一种AB-B类放大器，其包括包括第一多个放大装置的第一输出级和包括第二多个放大装置的第二输出级。 根据一个实施例，当AB类/ B放大器处于静态时，第一输出级工作，而当AB类/ B放大器处于活动状态时，第二输出级工作。 AB类/ B放大器还包括一个电平移动电路，其调节第二输出级的控制电压，其中当AB类/ B放大器进入激活状态时，电平移位电路用于激活第二输出级。 AB类/ B放大器的实施例可以包括实现固定或信号相关电平移位的电平移位电路和基本上消除由复制偏置电路内部的有源反馈电路产生的任何系统偏移的静态控制电路。

公开(公告)号：US08766722B2

公开(公告)日：2014-07-01

申请号：US13655339

申请日：2012-10-18

Applicant: Broadcom Corporation

Inventor： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

IPC: H03F3/26

CPC classification number: H03F3/211 ,  H03F1/301 ,  H03F3/3022 ,  H03F2200/375 ,  H03F2200/453 ,  H03F2203/30015

Abstract: Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

Abstract translation: 公开了一种AB-B类放大器，其包括包括第一多个放大装置的第一输出级和包括第二多个放大装置的第二输出级。 根据一个实施例，当AB类/ B放大器处于静态时，第一输出级工作，而当AB类/ B放大器处于活动状态时，第二输出级工作。 AB类/ B放大器还包括一个电平移动电路，其调节第二输出级的控制电压，其中当AB类/ B放大器进入激活状态时，电平移位电路用于激活第二输出级。 AB类/ B放大器的实施例可以包括实现固定或信号相关电平移位的电平移位电路和基本上消除由复制偏置电路内部的有源反馈电路产生的任何系统偏移的静态控制电路。

公开(公告)号：US08665023B2

公开(公告)日：2014-03-04

申请号：US13655362

申请日：2012-10-18

Applicant: Broadcom Corporation

Inventor： Sherif Galal ,  Alex Jianzhong Chen ,  Khaled Abdelfattah ,  Todd L. Brooks

IPC: H03F3/26

CPC classification number: H03F3/211 ,  H03F1/301 ,  H03F3/3022 ,  H03F2200/375 ,  H03F2200/453 ,  H03F2203/30015

Abstract: Disclosed is a Class-AB/B amplifier comprising a first output stage including a first plurality of amplification devices and a second output stage including a second plurality of amplification devices. According to one embodiment, the first output stage operates when the Class-AB/B amplifier is in a quiescent state and the second output stage operates when the Class-AB/B amplifier is in an active state. The Class-AB/B amplifier also comprises a level shifting circuit that adjusts a control voltage of the second output stage, where the level shifting circuit is adapted to activate the second output stage when the Class-AB/B amplifier enters the active state. Embodiments of the Class-AB/B amplifier may include a level shifting circuit that implements either a fixed or signal-dependent level shift, and a quiescent control circuit that substantially eliminates any systematic offset arising from the active feedback circuit inside the replica bias circuit.

Abstract translation: 公开了一种AB-B类放大器，其包括包括第一多个放大装置的第一输出级和包括第二多个放大装置的第二输出级。 根据一个实施例，当AB类/ B放大器处于静态时，第一输出级工作，而当AB类/ B放大器处于活动状态时，第二输出级工作。 AB类/ B放大器还包括一个电平移动电路，其调节第二输出级的控制电压，其中当AB类/ B放大器进入激活状态时，电平移位电路用于激活第二输出级。 AB类/ B放大器的实施例可以包括实现固定或信号相关电平移位的电平移位电路和基本上消除由复制偏置电路内部的有源反馈电路产生的任何系统偏移的静态控制电路。