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1. 发明申请

WO2013165653A1 SPLIT CAPACITORS SCHEME FOR SUPPRESSING OVERSHOOT VOLTAGE GLITCHES IN CLASS D AMPLIFIER OUTPUT STAGE 审中-公开
标题翻译：分级电容器，用于在D类放大器输出级中抑制过电压电压
公开(公告)号：WO2013165653A1
公开(公告)日：2013-11-07
申请号：PCT/US2013/035680
申请日：2013-04-08
申请人： QUALCOMM INCORPORATED
发明人： HUANG, Chenling , FEI, Haibo , SIENKO, Matthew D.
IPC分类号： H03F1/52 , H03F3/217
CPC分类号： H03F3/217 , H03F1/52
摘要： A class D power amplifier is provided. The class D power amplifier includes a class D driver circuit having a plurality of output transistors, at least one active clamp circuit coupled to at least one output transistor of the plurality of output transistors, and at least one filter bank circuit coupled to the at least one active clamp circuit for controlling a voltage of the at least one output transistor. Accordingly, a voltage across a drain node and source node (VDS), a voltage across a gate node and source node (VGS), and a voltage across the gate node and drain node (VGD) of the output transistors is reduced to increase reliability of the power amplifier while consuming less power and utilizing less die area.
摘要翻译：提供D类功率放大器。 D类功率放大器包括具有多个输出晶体管的D类驱动器电路，耦合到多个输出晶体管中的至少一个输出晶体管的至少一个有源钳位电路以及至少耦合到该至少一个的至少一个滤波器组电路一个有源钳位电路，用于控制至少一个输出晶体管的电压。因此，降低了漏极节点和源极节点（VDS）两端的电压，栅极节点和源节点（VGS）两端的电压以及输出晶体管的栅极节点和漏极节点（VGD）两端的电压，以增加可靠性的功率放大器，同时消耗更少的功率并且利用更少的管芯面积。

2. 发明申请

WO2017019288A1 SWING LIMITER CIRCUIT 审中-公开
标题翻译： SWING LIMITER电路
公开(公告)号：WO2017019288A1
公开(公告)日：2017-02-02
申请号：PCT/US2016/041817
申请日：2016-07-11
申请人： QUALCOMM INCORPORATED
发明人： LU, Jingxue , HUANG, Chenling
IPC分类号： H03F3/217 , H03F3/45
CPC分类号： H03F3/45668 , H03F3/2171 , H03F3/24 , H03F3/245 , H03F3/45497 , H03F2203/45151 , H03F2203/45522 , H03F2203/45526 , H04B2001/0408
摘要： A differential class-D amplifier module having common-mode swing limiter circuit is disclosed. The differential class-D amplifier module may include differential class-D amplifier configured to generate differential pulse width modulated (PWM) output signals based on differential input signals and at least a portion of the differential PWM output signals that are fed back to the differential class-D amplifier. The common-mode swing limiter circuit may attenuate one or more common-mode signal components associated with the PWM output signals that may be fed back to input terminals of the differential class-D amplifier.
摘要翻译：公开了具有共模摆幅限幅器电路的差分D类放大器模块。差分D类放大器模块可以包括差分D类放大器，其被配置为基于差分输入信号产生差分脉冲宽度调制（PWM）输出信号，以及反馈到差分类的至少一部分差分PWM输出信号 -D放大器。共模摆幅限制器电路可以衰减与可以反馈到差分D类放大器的输入端的PWM输出信号相关联的一个或多个共模信号分量。

3. 发明申请

WO2013162836A1 OVERCURRENT PROTECTION FOR CLASS D POWER AMPLIFIER 审中-公开
标题翻译： D类功率放大器的过流保护
公开(公告)号：WO2013162836A1
公开(公告)日：2013-10-31
申请号：PCT/US2013/034965
申请日：2013-04-02
申请人： QUALCOMM INCORPORATED
发明人： FEI, Haibo , SIENKO, Matthew D. , HUANG, Chenling
IPC分类号： H03F3/217 , H03F1/52
CPC分类号： H03F3/45 , H03F1/523 , H03F3/217 , H03F3/2171 , H03F3/2173 , H03F2200/456 , H03F2200/462 , H03F2200/474
摘要： In an aspect of the disclosure, a class D power amplifier with an overcurrent protection (OCP) circuit is provided. The class D power amplifier includes a plurality of output transistors, and the OCP circuit is mirrored to at least one output transistor of the plurality of output transistors in a closed-loop feedback configuration for precisely controlling a sensing current of the OCP circuit with respect to an output current of the at least one output transistor. The class D power amplifier with the OCP circuit in the closed-loop feedback configuration mitigates a variation in a current threshold value for triggering interruption of the class D power amplifier.
摘要翻译：在本公开的一个方面，提供了具有过电流保护（OCP）电路的D类功率放大器。 D类功率放大器包括多个输出晶体管，并且OCP电路以闭环反馈配置被镜像到多个输出晶体管中的至少一个输出晶体管，用于精确地控制OCP电路的感测电流相对于所述至少一个输出晶体管的输出电流。具有闭环反馈配置中的OCP电路的D类功率放大器减轻了用于触发D类功率放大器中断的电流阈值的变化。

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