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公开(公告)号：US20130188793A1
公开(公告)日：2013-07-25
申请号：US13692789
申请日：2012-12-03
Inventor： XiangSheng LI , Cristiano MERONI , Mei YANG , XianFeng XIONG
IPC: H03G11/00
CPC classification number: H03G3/348 , H03F1/52 , H03F3/183 , H03F3/21 , H03F2200/321 , H03F2200/375 , H03F2200/471 , H03F2200/78 , H03G11/00 , H04R1/00 , H04R3/007 , H04R2201/028 , H04R2499/13
Abstract: A method of operating a speaker system including a speaker coupled to an amplifier, and a dedicated digital speaker protection circuit includes turning on the amplifier in a mute mode, after a first delay period, issuing a play command to the amplifier to place the amplifier in a play mode, but without an input signal during a second delay period, and performing a speaker offset detection during the second delay period, wherein, if there is an offset, then the amplifier is forced back into the mute mode, and if there is no offset, then the amplifier is allowed to continue to operate in the play mode. The method also includes issuing a speaker protection control signal or command if an offset is detected.
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2.发明申请INPUT CLAMPING STRUCTURE FOR SOUND QUALITY IMPROVEMENT IN CAR-RADIO CLASS-AB POWER AMPLIFIER DESIGN 审中-公开无线电类AB功率放大器设计中声音质量改进的输入钳位结构公开(公告)号：US20150137888A1
公开(公告)日：2015-05-21
申请号：US14599701
申请日：2015-01-19
Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD
Inventor： Mei YANG , YueHua WANG , Xaut ZHANG , Kelvin WEN , XiangSheng LI
CPC classification number: H03F3/211 , H03F3/187 , H03F3/26 , H03F3/4508 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2203/21131 , H03F2203/45102 , H03F2203/45154 , H03F2203/45244 , H03F2203/45528 , H03F2203/45552
Abstract: A clamping circuit for a class AB amplifier includes a reference voltage circuit, four NPN Darlington transistors having inputs coupled to the reference voltage circuit, and outputs for providing four clamped voltages and a split NPN Darlington transistor having an input coupled to the reference voltage circuit, and four separate outputs for providing four AC ground voltages.
Abstract translation: 用于AB类放大器的钳位电路包括参考电压电路，具有耦合到参考电压电路的输入的四个NPN达林顿晶体管和用于提供四个钳位电压的输出和具有耦合到参考电压电路的输入的分立NPN达林顿晶体管， 和四个单独的输出，用于提供四个交流接地电压。
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3.发明申请INPUT CLAMPING STRUCTURE FOR SOUND QUALITY IMPROVEMENT IN CAR-RADIO CLASS-AB POWER AMPLIFIER DESIGN 有权无线电类AB功率放大器设计中声音质量改进的输入钳位结构公开(公告)号：US20130169362A1
公开(公告)日：2013-07-04
申请号：US13707350
申请日：2012-12-06
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.
Inventor： Mei YANG , YueHua WANG , Xaut ZHANG , Kelvin WEN , XiangSheng LI
IPC: H03F3/26
CPC classification number: H03F3/211 , H03F3/187 , H03F3/26 , H03F3/4508 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2203/21131 , H03F2203/45102 , H03F2203/45154 , H03F2203/45244 , H03F2203/45528 , H03F2203/45552
Abstract: A clamping circuit for a class AB amplifier includes a reference voltage circuit, four NPN Darlington transistors having inputs coupled to the reference voltage circuit, and outputs for providing four clamped voltages, and a split NPN Darlington transistor having an input coupled to the reference voltage circuit, and four separate outputs for providing four AC ground voltages.
Abstract translation: 用于AB类放大器的钳位电路包括参考电压电路，具有耦合到参考电压电路的输入的四个NPN达林顿晶体管和用于提供四个钳位电压的输出，以及具有耦合到参考电压电路的输入的分离NPN达林顿晶体管 ，以及四个独立的输出，用于提供四个交流接地电压。
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