-
公开(公告)号：US20140240154A1
公开(公告)日：2014-08-28
申请号：US14019246
申请日：2013-09-05
Applicant: Broadcom Corporation
Inventor： Min Gyu Kim , Dongtian Lu , Todd L. Brooks
IPC: H03M3/00
CPC classification number: H03M3/414 , H03M3/32 , H03M3/50 , H03M7/3022
Abstract: A multi-rate sigma delta digital-to-analog converter may include a signal input and a signal output, and multiple modulators. A first of the modulator may convert a digital input signal on the signal input to an analog output signal on the signal output. Subsequent of the multiple modulators may shape and cancel quantization noise received from a proceeding modulator. One of the modulators may operate at a higher frequency than does another of the multiple modulation loops.
Abstract translation: 多速率Σ-Δ数模转换器可以包括信号输入和信号输出以及多个调制器。 调制器中的第一个可以将信号输入上的数字输入信号转换为信号输出上的模拟输出信号。 随后的多个调制器可以形成和消除从前进的调制器接收的量化噪声。 调制器中的一个可以以比多个调制回路中的另一个更高的频率工作。
-
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。
-
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。
-
公开(公告)号：US08952837B2
公开(公告)日：2015-02-10
申请号：US14019246
申请日：2013-09-05
Applicant: Broadcom Corporation
Inventor： Min Gyu Kim , Dongtian Lu , Todd L. Brooks
CPC classification number: H03M3/414 , H03M3/32 , H03M3/50 , H03M7/3022
Abstract: A multi-rate sigma delta digital-to-analog converter may include a signal input and a signal output, and multiple modulators. A first of the modulator may convert a digital input signal on the signal input to an analog output signal on the signal output. Subsequent of the multiple modulators may shape and cancel quantization noise received from a proceeding modulator. One of the modulators may operate at a higher frequency than does another of the multiple modulation loops.
Abstract translation: 多速率Σ-Δ数模转换器可以包括信号输入和信号输出以及多个调制器。 调制器中的第一个可以将信号输入上的数字输入信号转换为信号输出上的模拟输出信号。 随后的多个调制器可以形成和消除从前进的调制器接收的量化噪声。 调制器中的一个可以以比多个调制回路中的另一个更高的频率工作。
-
Patent Agency Ranking
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
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。
-
6.发明申请公开(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：USRE46142E1
公开(公告)日：2016-09-06
申请号：US14481349
申请日：2014-09-09
Applicant: Broadcom Corporation
Inventor： James C. Thi , Theodore F. Rabenko , David Hartman , Robert M. Lukas , Kenneth J. Unger , Ramin Borazjani , Shane P. Lansing , Robert J. Lee , Todd L. Brooks , Kevin L. Miller
CPC classification number: H04M7/0087 , H04B3/23 , H04B3/234 , H04J3/0632 , H04J3/0638 , H04L12/2801 , H04L12/2834 , H04L12/5692 , H04L12/66 , H04L29/06027 , H04L65/1069 , H04M7/006 , H04M7/125 , H04N7/10 , H04N21/2383 , H04N21/4382
Abstract: A system is configured to facilitate bidirectional voice communication between a number of data and/or telephony devices.
-
8.发明授权公开(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。
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.017 seconds)
