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公开(公告)号：US09386372B2
公开(公告)日：2016-07-05
申请号：US14754861
申请日：2015-06-30
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 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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公开(公告)号：US20230378923A1
公开(公告)日：2023-11-23
申请号：US17747845
申请日：2022-05-18
Inventor： Jian Wen , Davide Luigi Brambilla , Qiyu Liu , Mei Yang , Shuming Tong , Francesco Stilgenbauer
CPC classification number: H03G3/3026 , H03G3/348 , H03G3/3036 , H03K4/06
Abstract: In an embodiment, an amplifier circuit includes a second stage that includes a first switch circuit including first and second terminals, a plurality of resistive elements coupled between the first and second terminals of the first switch circuit, and a plurality of switches configured to control an equivalent resistance between the first and second terminals of the first switch circuit. During play mode, the second stage has a gain between the input of the second stage and the output of the second stage of a first value. During a transition from mute mode to play mode, the amplifier circuit is configured to progressively increase the gain of the second stage from a second value to the first value. During a transition from play mode to mute mode, the amplifier circuit is configured to progressively decrease the gain of the second stage from the first value to the second value.
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公开(公告)号：US10050595B2
公开(公告)日：2018-08-14
申请号：US15723622
申请日：2017-10-03
Inventor： XiangSheng Li , Cristiano Meroni , Mei Yang , Xian Feng Xiong
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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公开(公告)号：US09800221B2
公开(公告)日：2017-10-24
申请号：US15356269
申请日：2016-11-18
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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公开(公告)号：US20170070201A1
公开(公告)日：2017-03-09
申请号：US15356269
申请日：2016-11-18
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.
Abstract translation: 电路可用于扬声器系统。 电路包括具有被配置为耦合到扬声器的输出的放大器。 偏移比较器具有耦合放大器的输出的输入，并被配置为提供偏移控制信号。 数字电路具有耦合到偏移比较器的输出的第一输入，被配置为接收放大器控制信号的第二输入，被配置为接收播放控制信号的第三输入和被配置为提供强制静音信号的输出， 用于控制放大器。
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Patent Agency Ranking
公开(公告)号：US09532142B2
公开(公告)日：2016-12-27
申请号：US15158854
申请日：2016-05-19
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 digital circuit can be used in a speaker system. An intermediate node provides a speaker protection control signal. A first latch for receives an offset control signal. A first logic gate receives a play control signal, the offset control signal, and the speaker protection control signal. A second logic gate is coupled to the first latch for receiving the play control signal and the speaker protection control signal. A second latch is coupled to the first logic gate for providing a forced mute signal. A third latch is coupled to the second logic gate and to the intermediate node.
Abstract translation: 数字电路可用于扬声器系统。 中间节点提供扬声器保护控制信号。 用于接收偏移控制信号的第一锁存器。 第一逻辑门接收播放控制信号，偏移控制信号和扬声器保护控制信号。 第二逻辑门耦合到第一锁存器，用于接收播放控制信号和扬声器保护控制信号。 第二锁存器耦合到第一逻辑门以提供强制静音信号。 第三锁存器耦合到第二逻辑门和中间节点。
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公开(公告)号：US20150381125A1
公开(公告)日：2015-12-31
申请号：US14613455
申请日：2015-02-04
Inventor： Kelvin Jian Wen , Mei Yang , Zheng Hua Song , Xian Xiong , Cristiano Meroni
CPC classification number: H03F3/187 , H03F3/45475 , H03F3/45941 , H03F2200/03 , H03F2200/441 , H03F2203/45138 , H03F2203/45418 , H03F2203/45424 , H03F2203/45528 , H03F2203/45541
Abstract: A power amplifier includes a clamping circuit configured to provide a clamped voltage from a power supply; an amplifier pair having first inputs coupled to the clamping circuit, second inputs and an output for providing an amplified signal; and a biasing circuit coupled between the clamping circuit and the second inputs. The biasing circuit is configured to adjust input bias voltages of the amplifier pair such that the bias voltage of the output of the amplifier pair varies proportionally to a change of the power supply.
Abstract translation: 功率放大器包括被配置为提供来自电源的钳位电压的钳位电路; 放大器对，其具有耦合到所述钳位电路的第一输入，第二输入和用于提供放大信号的输出; 以及耦合在所述钳位电路和所述第二输入之间的偏置电路。 偏置电路被配置为调整放大器对的输入偏置电压，使得放大器对的输出的偏置电压与电源的变化成比例地变化。
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公开(公告)号：US09099978B2
公开(公告)日：2015-08-04
申请号：US13692789
申请日：2012-12-03
Inventor： XiangSheng Li , Cristiano Meroni , Mei Yang , XianFeng 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 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.
Abstract translation: 一种操作包括耦合到放大器的扬声器的扬声器系统和专用数字扬声器保护电路的方法包括：在第一延迟周期之后，以静音模式接通放大器，向放大器发出放大指令以放大放大器 播放模式，但是在第二延迟时段期间没有输入信号，并且在第二延迟周期期间执行扬声器偏移检测，其中，如果存在偏移，则放大器被强制回到静音模式，并且如果存在 无偏移，则允许放大器在播放模式下继续工作。 如果检测到偏移，该方法还包括发出扬声器保护控制信号或命令。
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公开(公告)号：US09461598B2
公开(公告)日：2016-10-04
申请号：US14613455
申请日：2015-02-04
Inventor： Kelvin Jian Wen , Mei Yang , Zheng Hua Song , Xian Xiong , Cristiano Meroni
CPC classification number: H03F3/187 , H03F3/45475 , H03F3/45941 , H03F2200/03 , H03F2200/441 , H03F2203/45138 , H03F2203/45418 , H03F2203/45424 , H03F2203/45528 , H03F2203/45541
Abstract: A power amplifier includes a clamping circuit configured to provide a clamped voltage from a power supply; an amplifier pair having first inputs coupled to the clamping circuit, second inputs and an output for providing an amplified signal; and a biasing circuit coupled between the clamping circuit and the second inputs. The biasing circuit is configured to adjust input bias voltages of the amplifier pair such that the output of the amplifier pair varies proportionally to a change of the power supply.
Abstract translation: 功率放大器包括被配置为提供来自电源的钳位电压的钳位电路; 放大器对，其具有耦合到所述钳位电路的第一输入，第二输入和用于提供放大信号的输出; 以及耦合在所述钳位电路和所述第二输入之间的偏置电路。 偏置电路被配置为调整放大器对的输入偏置电压，使得放大器对的输出与电源的变化成比例地变化。
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公开(公告)号：US20160269825A1
公开(公告)日：2016-09-15
申请号：US15158854
申请日：2016-05-19
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 digital circuit can be used in a speaker system. An intermediate node provides a speaker protection control signal. A first latch for receives an offset control signal. A first logic gate receives a play control signal, the offset control signal, and the speaker protection control signal. A second logic gate is coupled to the first latch for receiving the play control signal and the speaker protection control signal. A second latch is coupled to the first logic gate for providing a forced mute signal. A third latch is coupled to the second logic gate and to the intermediate node.
Abstract translation: 数字电路可用于扬声器系统。 中间节点提供扬声器保护控制信号。 用于接收偏移控制信号的第一锁存器。 第一逻辑门接收播放控制信号，偏移控制信号和扬声器保护控制信号。 第二逻辑门耦合到第一锁存器，用于接收播放控制信号和扬声器保护控制信号。 第二锁存器耦合到第一逻辑门以提供强制静音信号。 第三锁存器耦合到第二逻辑门和中间节点。
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