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

IPC: H03F3/68 ,  H03F3/21 ,  H03F1/02 ,  H03F3/187 ,  H03F3/45 ,  H03F3/72

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。

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。