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公开(公告)号：US20140070889A1
公开(公告)日：2014-03-13
申请号：US13711367
申请日：2012-12-11
Applicant: BROADCOM CORPORATION
Inventor： Jianlong Chen , Sasi Kumar Arunachalam , Todd L. Brooks
IPC: H03F3/21
CPC classification number: H03F3/211 , H03F1/0211 , H03F1/0261 , H03F1/0277 , H03F3/187 , H03F3/45475 , H03F3/68 , H03F3/72 , H03F2200/405 , H03F2203/45528
Abstract: A low quiescent current amplifier and driver having multiple amplifiers (e.g. Class AB and B amplifiers) work in concert to independently amplify all or a portion of a signal into multiple amplified signals combined into a unified signal. Operation of a second amplifier is slaved to operation of a first amplifier. Each amplifier may have its own feedback loop providing the same gain transfer function to align transitions of the multiple amplified signals. Operation of the first amplifier may be detected using a replica of a signal, stage or transconductance in the first amplifier. At the same threshold, operation of the first and second amplifiers may be transitioned, e.g., the second amplifier may transition between providing increasing or decreasing current and providing zero current while the first amplifier may transition between providing constant current and providing increasing or decreasing current.
Abstract translation: 具有多个放大器（例如AB类和B类放大器）的低静态电流放大器和驱动器协同工作，以独立地将信号的全部或一部分放大成组合成统一信号的多个放大信号。 第二放大器的操作被切换到第一放大器的操作。 每个放大器可以具有其自己的反馈环路，提供相同的增益传递函数以对准多个放大信号的转换。 可以使用第一放大器中的信号，级或跨导的复本来检测第一放大器的操作。 在相同的阈值下，可以转换第一和第二放大器的操作，例如，第二放大器可以在提供增加或减小的电流之间转换并提供零电流，同时第一放大器可以在提供恒定电流并且提供增加或减小的电流之间转变。
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公开(公告)号：US09287835B2
公开(公告)日：2016-03-15
申请号：US13711367
申请日：2012-12-11
Applicant: Broadcom Corporation
Inventor： Jianlong Chen , Sasi Kumar Arunachalam , Todd L. Brooks
CPC classification number: H03F3/211 , H03F1/0211 , H03F1/0261 , H03F1/0277 , H03F3/187 , H03F3/45475 , H03F3/68 , H03F3/72 , H03F2200/405 , H03F2203/45528
Abstract: A low quiescent current amplifier and driver having multiple amplifiers (e.g. Class AB and B amplifiers) work in concert to independently amplify all or a portion of a signal into multiple amplified signals combined into a unified signal. Operation of a second amplifier is slaved to operation of a first amplifier. Each amplifier may have its own feedback loop providing the same gain transfer function to align transitions of the multiple amplified signals. Operation of the first amplifier may be detected using a replica of a signal, stage or transconductance in the first amplifier. At the same threshold, operation of the first and second amplifiers may be transitioned, e.g., the second amplifier may transition between providing increasing or decreasing current and providing zero current while the first amplifier may transition between providing constant current and providing increasing or decreasing current.
Abstract translation: 具有多个放大器（例如AB类和B类放大器）的低静态电流放大器和驱动器协同工作，以独立地将信号的全部或一部分放大成组合成统一信号的多个放大信号。 第二放大器的操作被切换到第一放大器的操作。 每个放大器可以具有其自己的反馈环路，提供相同的增益传递函数以对准多个放大信号的转换。 可以使用第一放大器中的信号，级或跨导的复本来检测第一放大器的操作。 在相同的阈值下，可以转换第一和第二放大器的操作，例如，第二放大器可以在提供增加或减小的电流之间转换并提供零电流，同时第一放大器可以在提供恒定电流并且提供增加或减小的电流之间转变。
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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。
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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。
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