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1. 发明授权

US11736082B2 Clipping state detecting circuit and clipping state detecting method 有权
公开(公告)号：US11736082B2
公开(公告)日：2023-08-22
申请号：US17410407
申请日：2021-08-24
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
发明人： Takayuki Takida
IPC分类号： H03F3/217 , H03G3/20 , H03G11/00 , H03F1/52 , H03G3/30
CPC分类号： H03G11/00 , H03F1/523 , H03F3/217 , H03G3/3021 , H03F2200/351 , H03F2200/66
摘要： According to one embodiment, a clipping state detecting circuit includes: a zero-cross detection circuit that detects a zero-cross point of an input signal; an output circuit that converts the input signal into a PWM signal; a clip detection circuit that detects a state in which an output of the output circuit is clipped; and a control circuit that determines a state is a clipping state when a clip time of the output of the output circuit satisfies a condition of a threshold value set in advance with respect to a non-clip time.

2. 发明授权

US09800221B2 Embedded speaker protection for automotive audio power amplifier 有权
公开(公告)号：US09800221B2
公开(公告)日：2017-10-24
申请号：US15356269
申请日：2016-11-18
申请人： STMicroelectronics (Shenzhen) R&D Co. Ltd. , STMicroelectronics S.r.l.
发明人： XiangSheng Li , Cristiano Meroni , Mei Yang , Xian Feng Xiong
IPC分类号： H04R3/00 , H03G11/00 , H03G3/34 , H03F1/52 , H03F3/21 , H03F3/183 , H04R1/00
CPC分类号： 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
摘要： 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.

3. 发明授权

US09755586B2 Radiofrequency power limiter, and associated radiofrequency emitter and/or receiver chain and low-noise amplifying stage 有权
公开(公告)号：US09755586B2
公开(公告)日：2017-09-05
申请号：US15035561
申请日：2014-11-18
申请人： Thales
发明人： Jean-Philippe Plaze , Vincent Petit , Benoît Mallet-Guy
IPC分类号： H03F1/52 , H03F3/19 , H03G7/00 , H03G11/00 , H03G11/02 , H03G11/06
CPC分类号： H03F1/52 , H03F3/19 , H03F2200/211 , H03F2200/294 , H03F2200/444 , H03F2200/451 , H03G7/00 , H03G11/00 , H03G11/002 , H03G11/02 , H03G11/06
摘要： This radiofrequency power limiter includes at least one transistor, a drain of the transistor being directly connected to a mesh connecting an input to an output of the limiter, a source of the transistor being connected to a common reference potential, and a gate of the transistor being connected to a common control potential. The transistor is not biased between its drain and its source during operation of the limiter.

4. 发明授权

US09735762B2 Amplifier 有权
公开(公告)号：US09735762B2
公开(公告)日：2017-08-15
申请号：US15068071
申请日：2016-03-11
申请人： Kabushiki Kaisha Toshiba
发明人： Katsuhiro Yasuda , Hiroyuki Tsurumi
IPC分类号： H03K5/08 , H03K5/003
CPC分类号： H03K5/08 , H03F3/45475 , H03F3/45968 , H03F2203/45138 , H03G11/00 , H03K5/003
摘要： An amplifier includes a first voltage generating circuit that generates a first clamp voltage based on a reference voltage and a first voltage, a second voltage generating circuit that generates a second clamp voltage based on the reference voltage and a second voltage that is lower than the first voltage, a third voltage generating circuit that generates a second AC voltage that changes with the same voltage amplitude in a vertical direction of the reference voltage, based on an input first AC voltage, within a voltage range of the first voltage and the first clamp voltage, or within a voltage range of the second clamp voltage and the second voltage, and an amplification circuit that amplifies the voltage amplitude of the second AC voltage and generates a third AC voltage.

5. 发明授权

US09628926B2 Modeling loudspeakers based on cascading lumped parameter models with neural networks 有权
公开(公告)号：US09628926B2
公开(公告)日：2017-04-18
申请号：US14702382
申请日：2015-05-01
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC
发明人： Ajay Iyer
IPC分类号： H04R29/00 , H04R3/00 , H03G11/00
CPC分类号： H04R29/001 , H03G11/00 , H04R3/007
摘要： In one embodiment of the present invention, a loudspeaker modeling subsystem configures a neural lumped parameter loudspeaker (NeLP) model to represent the behavior of a loudspeaker. The NeLP model is implemented as a cascaded combination of a lumped parameter model (LPM) and a neural network (NN) model. To configure the model, the loudspeaker modeling subsystem first estimates values for the parameters used in the LPM. The loudspeaker modeling subsystem then “fixes” these parameters and trains the NN model to act on a predicted output pressure that is generated via the LPM. More specifically, the loudspeaker modeling subsystem configures the NN to modify the predicted output pressure to minimize the error between the predicted output pressure and a measured loudspeaker output pressure. Notably, by strategically fusing the LPM and the NN model, the NeLP model leverages the strengths and mitigates the weaknesses typically associated with conventional loudspeaker modeling techniques.

6. 发明申请

US20170070201A1 Embedded Speaker Protection for Automotive Audio Power Amplifier 有权
标题翻译：汽车音频功率放大器的嵌入式扬声器保护
公开(公告)号：US20170070201A1
公开(公告)日：2017-03-09
申请号：US15356269
申请日：2016-11-18
申请人： STMicroelectronics (Shenzhen) R&D Co. Ltd. , STMicroelectronics S.r.l.
发明人： XiangSheng Li , Cristiano Meroni , Mei Yang , Xian Feng Xiong
IPC分类号： H03G3/34 , H03F3/21 , H03F3/183 , H04R3/00
CPC分类号： 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
摘要： 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.
摘要翻译：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。

7. 发明授权

US09532142B2 Embedded speaker protection for automotive audio power amplifier 有权
标题翻译：汽车音响功率放大器嵌入式扬声器保护
公开(公告)号：US09532142B2
公开(公告)日：2016-12-27
申请号：US15158854
申请日：2016-05-19
申请人： STMicroelectronics (Shenzhen) R&D Co., Ltd. , STMicroelectronics S.r.l
发明人： XiangSheng Li , Cristiano Meroni , Mei Yang , Xian Feng Xiong
IPC分类号： H04R3/00 , H03G11/00 , H03F1/52 , H03G3/34 , H03F3/21 , H03F3/183 , H04R1/00
CPC分类号： 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
摘要： 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.
摘要翻译：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。

8. 发明申请

US20160323685A1 MODELING LOUDSPEAKERS BASED ON CASCADING LUMPED PARAMETER MODELS WITH NEURAL NETWORKS 有权
标题翻译：基于具有神经网络的渐变参数模型建模扬声器
公开(公告)号：US20160323685A1
公开(公告)日：2016-11-03
申请号：US14702382
申请日：2015-05-01
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC
发明人： Ajay IYER
IPC分类号： H04R29/00
CPC分类号： H04R29/001 , H03G11/00 , H04R3/007
摘要： In one embodiment of the present invention, a loudspeaker modeling subsystem configures a neural lumped parameter loudspeaker (NeLP) model to represent the behavior of a loudspeaker. The NeLP model is implemented as a cascaded combination of a lumped parameter model (LPM) and a neural network (NN) model. To configure the model, the loudspeaker modeling subsystem first estimates values for the parameters used in the LPM. The loudspeaker modeling subsystem then “fixes” these parameters and trains the NN model to act on a predicted output pressure that is generated via the LPM. More specifically, the loudspeaker modeling subsystem configures the NN to modify the predicted output pressure to minimize the error between the predicted output pressure and a measured loudspeaker output pressure. Notably, by strategically fusing the LPM and the NN model, the NeLP model leverages the strengths and mitigates the weaknesses typically associated with conventional loudspeaker modeling techniques.
摘要翻译：在本发明的一个实施例中，扬声器建模子系统配置神经集总参数扬声器（NeLP）模型以表示扬声器的行为。 NeLP模型实现为集中参数模型（LPM）和神经网络（NN）模型的级联组合。要配置模型，扬声器建模子系统首先估计LPM中使用的参数值。扬声器建模子系统然后“修复”这些参数，并训练NN模型以作用于通过LPM生成的预测输出压力。更具体地，扬声器建模子系统配置NN以修改预测的输出压力，以使预测输出压力和测量的扬声器输出压力之间的误差最小化。值得注意的是，通过战略性地融合LPM和NN模型，NeLP模型利用了优势，减轻了与传统扬声器建模技术相关的弱点。

9. 发明授权

US09276544B2 Dynamic range control gain encoding 有权
标题翻译：动态范围控制增益编码
公开(公告)号：US09276544B2
公开(公告)日：2016-03-01
申请号：US14280423
申请日：2014-05-16
申请人： Apple Inc.
发明人： Frank M. Baumgarte
IPC分类号： H03G3/00 , H03G3/20 , H03G11/00 , H03G3/32 , H03G7/00
CPC分类号： H03G3/20 , H03G3/001 , H03G3/32 , H03G7/007 , H03G11/00
摘要： A system and method is provided for converting Dynamic Range Control/Compression (DRC) gain values into a spline representation that is compatible with the current standards. The system and method may: 1) minimize the bitrate for encoding and/or 2) minimize the approximation error between reference gain and interpolation values. A strategy for bitrate minimization may be the reduction of the number of spline nodes since gain and slope information must be transmitted for each node. Accordingly, an efficient heuristics based approach is provided that reduces the number of spline nodes needed to represent a series of DRC gain values using interpolation while accounting for overshoots and other inaccuracies.
摘要翻译：提供了一种用于将动态范围控制/压缩（DRC）增益值转换为与当前标准兼容的样条表示的系统和方法。该系统和方法可以：1）最小化用于编码的比特率和/或2）最小化参考增益和内插值之间的近似误差。用于比特率最小化的策略可以是减少花键节点的数量，因为必须为每个节点传输增益和斜率信息。因此，提供了一种基于有效启发法的方法，其减少了使用插值来表示一系列DRC增益值所需的样条节点的数量，同时考虑了过冲和其他不准确性。

10. 发明申请

US20150304773A1 EMBEDDED SPEAKER PROTECTION FOR AUTOMOTIVE AUDIO POWER AMPLIFIER 有权
标题翻译：嵌入式扬声器保护汽车音响功率放大器
公开(公告)号：US20150304773A1
公开(公告)日：2015-10-22
申请号：US14754861
申请日：2015-06-30
申请人： STMICROELECTRONICS (SHENZHEN) R&D CO., LTD. , STMICROELECTRONICS S.R.L.
发明人： XIANGSHENG LI , CRISTIANO MERONI , MEI YANG , XIAN FENG XIONG
IPC分类号： H04R3/00 , H03F3/183 , H03G3/34 , H04R1/00
CPC分类号： 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
摘要： 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.
摘要翻译：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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