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公开(公告)号：US20180026598A1
公开(公告)日：2018-01-25
申请号：US15723622
申请日：2017-10-03
Inventor： XiangSheng Li , Cristiano Meroni , Mei Yang , Xian Feng Xiong
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 circuit can be used in a speaker system. The circuit includes an amplifier with an output configured to be coupled to a speaker. An offset comparator has an input coupled the output of the amplifier and is configured to provide an offset control signal. A digital circuit has a first input coupled to an output of the offset comparator, a second input configured to receive an amplifier control signal, a third input configured to receive a play control signal, and an output configured to provide a forced mute signal that can be used to control the amplifier.
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Patent Agency Ranking
公开(公告)号：US10917086B2
公开(公告)日：2021-02-09
申请号：US16410857
申请日：2019-05-13
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.
Inventor： Jian Wen , Hong Xia Li , Mei Yang
IPC: H03K17/687 , H03F3/45 , G01R31/30
Abstract: In an embodiment, a power switch controller for driving a back-to-back power switch includes: an amplifier having a supply terminal configured to receive a supply voltage, an output configured to be coupled to a gate terminal of the back-to-back power switch, a first input configured to be coupled a source terminal of the back-to-back power switch, and a second input coupled to the output of the amplifier. The amplifier is configured to generate an output voltage at the output of the amplifier, the output voltage being an offset voltage higher than a voltage at the first input of the amplifier.
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13.发明授权Layout and pad floor plan of power transistor for good performance of SPU and STOG 有权功率晶体管的布局和焊盘平面图，实现了SPU和STOG的良好性能公开(公告)号：US08691684B2
公开(公告)日：2014-04-08
申请号：US13906223
申请日：2013-05-30
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.
Inventor： Guo Hua Zhong , Mei Yang
IPC: H01L21/44
CPC classification number: H01L21/4871 , H01L23/4824 , H01L2924/0002 , H01L2924/00
Abstract: A power transistor for use in an audio application is laid out to minimize hot spots. Hot spots are created by non-uniform power dissipation or overly concentrated current densities. The source and drain pads are disposed relative to each other to facilitate uniform power dissipation. Interleaving metal fingers and upper metal layers are connected directly to lower metal layers in the absence of vias to improve current density distribution. This layout improves some fail detection tests by 17%.
Abstract translation: 布置用于音频应用的功率晶体管以最小化热点。 热点由不均匀的功耗或过度集中的电流密度产生。 源极和漏极焊盘相对于彼此设置以促进均匀的功率耗散。 在没有通孔的情况下，交叉金属指和上金属层直接连接到下金属层，以改善电流密度分布。 这种布局改进了17％的失败检测测试。
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14.发明申请LAYOUT AND PAD FLOOR PLAN OF POWER TRANSISTOR FOR GOOD PERFORMANCE OF SPU AND STOG 有权功率晶体管的布局和平铺布局，用于SPU和STOG的良好性能公开(公告)号：US20130267087A1
公开(公告)日：2013-10-10
申请号：US13906223
申请日：2013-05-30
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.
Inventor： Guo Hua Zhong , Mei Yang
IPC: H01L21/48
CPC classification number: H01L21/4871 , H01L23/4824 , H01L2924/0002 , H01L2924/00
Abstract: A power transistor for use in an audio application is laid out to minimize hot spots. Hot spots are created by non-uniform power dissipation or overly concentrated current densities. The source and drain pads are disposed relative to each other to facilitate uniform power dissipation. Interleaving metal fingers and upper metal layers are connected directly to lower metal layers in the absence of vias to improve current density distribution. This layout improves some fail detection tests by 17%.
Abstract translation: 布置用于音频应用的功率晶体管以最小化热点。 热点由不均匀的功耗或过度集中的电流密度产生。 源极和漏极焊盘相对于彼此设置以促进均匀的功率耗散。 在没有通孔的情况下，交叉金属指和上金属层直接连接到下金属层，以改善电流密度分布。 这种布局改进了17％的失败检测测试。
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15.发明授权Input clamping structure for sound quality improvement in car-radio class-AB power amplifier design 有权输入钳位结构，用于汽车无线电类AB功率放大器设计中的音质改善公开(公告)号：US09331644B2
公开(公告)日：2016-05-03
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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16.发明授权Input clamping structure for sound quality improvement in car-radio class-AB power amplifier design 有权输入钳位结构，用于汽车无线电类AB功率放大器设计中的音质改善公开(公告)号：US08970280B2
公开(公告)日：2015-03-03
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
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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