公开(公告)号：US20150003660A9

公开(公告)日：2015-01-01

申请号：US13915780

申请日：2013-06-12

Applicant: CIRRUS LOGIC, INC.

Inventor： John L. Melanson ,  Eric Swanson

IPC: H04R1/04

CPC classification number: H04R3/005 ,  H04R1/04 ,  H04R1/1041 ,  H04R3/04 ,  H04R19/02 ,  H04R19/04 ,  H04R2400/01 ,  H04R2499/11 ,  H04W52/0251 ,  H04W52/0254 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164 ,  Y02D70/168

Abstract: In accordance with methods and systems of the present disclosure, a mobile device may include an enclosure adapted such that the enclosure is readily transported by a user of the mobile device, a speaker associated with the enclosure for generating sound, and a controller within the enclosure, communicatively coupled to the speaker. The controller may be configured to receive a signal from the speaker, the signal induced at least in part by sound incident on the speaker other than sound generated by the speaker and process the signal.

公开(公告)号：US08907829B1

公开(公告)日：2014-12-09

申请号：US13896526

申请日：2013-05-17

Applicant: Cirrus Logic, Inc.

Inventor： Ali Naderi

IPC: H03M3/00 ,  H03M1/12 ,  H03M1/80 ,  H03M1/00

CPC classification number: H03M3/496 ,  H03M1/00 ,  H03M1/12 ,  H03M1/804 ,  H03M3/30 ,  H03M3/424

Abstract: In accordance with systems and methods of the present disclosure, an input network for a delta-sigma modulator having at least one integrator stage and a feedback digital-to-analog stage, may be configured to, during a first period of a first phase of a clock signal, drive an analog feedback signal proportional to a digital feedback signal of the feedback digital-to-analog stage onto an input plate of a sampling capacitor integral to the input network. The input network may further be configured to, during a second period of the first phase of the clock signal, sample an analog input signal onto the input plates of the sampling capacitor.

Abstract translation: 根据本公开的系统和方法，用于具有至少一个积分器级和反馈数模转换级的Δ-Σ调制器的输入网络可以被配置为在第一阶段的第一阶段期间， 时钟信号，将与反馈数模转换级的数字反馈信号成比例的模拟反馈信号驱动到与输入网络集成的采样电容器的输入板上。 输入网络还可以被配置为在时钟信号的第一阶段的第二周期期间将模拟输入信号采样到采样电容器的输入板上。

公开(公告)号：US20140339995A1

公开(公告)日：2014-11-20

申请号：US14280474

申请日：2014-05-16

Applicant: Cirrus Logic, Inc.

Inventor： Ramin Zanbaghi ,  John L. Melanson ,  Jieyeon Choi

IPC: H05B33/08 ,  H02M3/158

CPC classification number: H05B33/0815 ,  H02M3/158 ,  H02M2001/0009 ,  H05B33/0845 ,  Y02B20/346

Abstract: A power stage for light emitting diode (LED)-based light bulbs may include a bipolar junction transistor (BJT). The base of BJT switch may be biased externally and the operation of the BJT may be through a single pin to the emitter of the BJT. A controller integrated circuit (IC) may control the power stage through the main BJT's emitter pin in an emitter-controlled BJT-based power stage. The emitter-controlled BJT-based power stage may replace the conventional buck-boost power stage topology. For example, the controller may activate and deactivate a switch coupling the BJT's emitter to ground. A power supply for the controller IC may be charged from a reverse recovery of charge from the BJT, and the reverse recovery controlled by the controller IC.

Abstract translation: 基于发光二极管（LED）的灯泡的功率级可以包括双极结型晶体管（BJT）。 BJT开关的基极可能被外部偏置，并且BJT的操作可能通过BJT的发射极的单个引脚。 控制器集成电路（IC）可以通过发射极控制的基于BJT的功率级中的主BJ​​T发射极引脚来控制功率级。 基于发射极控制的基于BJT的功率级可以取代传统的降压 - 升压功率级拓扑。 例如，控制器可以激活和去激活将BJT的发射极耦合到地的开关。 用于控制器IC的电源可以从BJT的反向恢复电荷和由控制器IC控制的反向恢复来充电。

公开(公告)号：US20140333205A1

公开(公告)日：2014-11-13

申请号：US14276535

申请日：2014-05-13

Applicant: Cirrus Logic, Inc.

Inventor： Michael A. Kost ,  Eric J. King ,  John L. Melanson ,  Kan Wang ,  Ramin Zanbaghi

IPC: H02M5/458 ,  H05B33/08

CPC classification number: H02M5/458 ,  H05B33/0815 ,  H05B33/0887

Abstract: An electronic transformer stabilization circuit includes a detection circuit and a reactive load. The detection circuit may be configured to receive a transformer output or a transformer signal derived from the transformer output. The detection circuit may determine whether the transformer that generated the transformer output is an electronic transformer. The determination may be made based on the presence of absence of high frequency components in the transformer output. Responsive to determining that an electronic transformer generated the transformer output, the stabilization circuit may operate a switch to connect the reactive load across an output of the transformer. The reactive load may include an inductor and may be configured to draw a stabilization current from the transformer. The stabilization current may ensure that the total current drawn from the transformer exceeds an oscillation current required to maintain reliable operation of the electronic transformer.

Abstract translation: 电子变压器稳定电路包括检测电路和无功负载。 检测电路可以被配置为接收从变压器输出导出的变压器输出或变压器信号。 检测电路可以确定产生变压器输出的变压器是电子变压器。 可以基于变压器输出中是否存在高频分量进行确定。 响应于确定电子变压器产生变压器输出，稳定电路可以操作开关以连接变压器输出端上的无功负载。 无功负载可以包括电感器，并且可以被配置成从变压器抽出稳定电流。 稳定电流可以确保从变压器抽出的总电流超过维持电子变压器可靠运行所需的振荡电流。

公开(公告)号：US20140314244A1

公开(公告)日：2014-10-23

申请号：US13943454

申请日：2013-07-16

Applicant: Cirrus Logic, Inc.

Inventor： Chin Huang Yong ,  Jeffrey D. Alderson

IPC: G10K11/16

CPC classification number: G10K11/16 ,  G10K11/178 ,  G10K11/17817 ,  G10K11/17833 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3014 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3027 ,  G10K2210/30351

Abstract: A processing circuit may comprise an adaptive filter having a response generating an anti-noise signal from a reference microphone signal, a secondary path estimate filter modeling an electro-acoustic path of a source audio signal, a biasing portion that generates a scaled anti-noise signal by applying a scaling factor and the response of the secondary path estimate filter to the anti-noise signal, and a coefficient control block that shapes the response of the adaptive filter in conformity with the reference microphone signal and a modified playback corrected error signal by adapting the response of the adaptive filter to minimize ambient audio sounds in the error microphone signal, wherein the playback corrected error is based on a difference between the error microphone signal and the source audio signal and the modified playback corrected error signal is based on a difference between the playback corrected error signal and the scaled anti-noise signal.

Abstract translation: 处理电路可以包括具有从参考麦克风信号产生抗噪声信号的响应的自适应滤波器，对源音频信号的电声路径建模的次路径估计滤波器，产生缩放抗噪声的偏置部分 通过对抗噪声信号应用缩放因子和次路径估计滤波器的响应的信号;以及系数控制块，其根据参考麦克风信号和经修改的重放校正误差信号对自适应滤波器的响应进行整形， 适应自适应滤波器的响应以最小化误差麦克风信号中的环境音频声音，其中重放校正误差基于误差麦克风信号和源音频信号之间的差异，并且经修改的重放校正误差信号基于差 在重放校正误差信号和缩放的抗噪声信号之间。

公开(公告)号：US20140307890A1

公开(公告)日：2014-10-16

申请号：US13952221

申请日：2013-07-26

Applicant: Cirrus Logic, Inc.

Inventor： Dayong Zhou ,  Yang Lu ,  Ning Li

IPC: G10K11/16

CPC classification number: H04R3/002 ,  G10K11/16 ,  G10K11/178 ,  G10K11/17817 ,  G10K11/17833 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3035 ,  G10K2210/3039 ,  G10K2210/3055 ,  G10K2210/3056 ,  G10K2210/503 ,  G10K2210/509

Abstract: In accordance with methods and systems of the present disclosure, a processing circuit may implement at least one of: a feedback filter having a response that generates at least a portion of an anti-noise component from a playback corrected error, the playback corrected error based on a difference between the error microphone signal and a secondary path estimate; and a feedforward filter having a response that generates at least a portion of the anti-noise signal from a reference microphone signal. The processing circuit may also implement a secondary path estimate filter configured to model an electro-acoustic path of a source audio signal and have a response that generates a secondary path estimate from the source audio signal and a secondary path estimate performance monitor for monitoring performance of the secondary path estimate filter in modeling the electro-acoustic path.

Abstract translation: 根据本公开的方法和系统，处理电路可以实现以下至少一个：具有响应的反馈滤波器，该响应从回放校正误差产生抗噪声分量的至少一部分，基于回放校正误差 在误差麦克风信号和次路径估计之间的差异; 以及前馈滤波器，其具有从参考麦克风信号产生抗噪声信号的至少一部分的响应。 处理电路还可以实现二次路径估计滤波器，其被配置为对源音频信号的电声路径进行建模，并且具有从源音频信号生成次路径估计的响应，以及用于监视源音频信号的次级路径估计性能监视器 二次路径估计滤波器对电声路径进行建模。

公开(公告)号：US20140307888A1

公开(公告)日：2014-10-16

申请号：US13962515

申请日：2013-08-08

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix ,  Antonio J. Miller ,  Robert G. Kratsas ,  Jens-Peter B. Axelsson ,  Dayong Zhou ,  Yang Lu ,  Chin Huang Yong

IPC: H04R3/00

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K11/17827 ,  G10K11/17854 ,  G10K11/17885

Abstract: In accordance with the present disclosure, an integrated circuit for implementing at least a portion of a personal audio device may include an output and a processing circuit. The output may provide an output signal to a transducer including both a source audio signal for playback to a listener and an anti-noise signal for countering the effect of ambient audio sounds in an acoustic output of the transducer. The processing circuit may implement an adaptive noise cancellation system that generates the anti-noise signal to reduce the presence of the ambient audio sounds heard by the listener by adapting, based on a presence of the source audio signal, a response of the adaptive noise cancellation system to minimize the ambient audio sounds at the acoustic output of the transducer, wherein the adaptive noise cancellation system is configured to adapt both in the presence and the absence of the source audio signal.

Abstract translation: 根据本公开，用于实现个人音频设备的至少一部分的集成电路可以包括输出和处理电路。 输出可以向传感器提供输出信号，该换能器包括用于回放到收听者的源音频信号和用于抵消在换能器的声输出中环境音频声音的影响的抗噪声信号。 处理电路可以实现自适应噪声消除系统，其产生抗噪声信号，以通过根据源音频信号的存在来适应自适应噪声消除的响应来减少由收听者听到的环境音频声音的存在 系统以最小化在换能器的声输出处的环境音频声音，其中自适应噪声消除系统被配置为在存在和不存在源音频信号的同时适应。

公开(公告)号：US20140294182A1

公开(公告)日：2014-10-02

申请号：US13931133

申请日：2013-06-28

Applicant: Cirrus Logic, Inc.

Inventor： Jens-Peter B. Axelsson ,  John L. Melanson

IPC: H04R29/00

CPC classification number: H04R29/001 ,  H04R1/1083 ,  H04R2410/05

Abstract: An apparatus may include an acoustic transducer, a housing, a microphone, and an acoustical conduit. The acoustic transducer may include a diaphragm having a front and a back, the diaphragm configured to mechanically vibrate in response to an audio signal, thereby producing sound from the front of the diaphragm. The housing may be configured to mechanically support the acoustic transducer such that the front faces an exterior of the housing and the back faces an interior of the housing. The microphone may be disposed in the interior of the housing and may be configured to sense combined sound produced by the acoustic transducer and ambient sound proximate to the acoustic transducer. The acoustical conduit may be coupled to and extend from the microphone and pass adjacent the acoustic transducer such that the microphone senses sound proximate to the front of the diaphragm.

Abstract translation: 一种装置可以包括声换能器，壳体，麦克风和声导管。 声换能器可以包括具有前和后的隔膜，所述隔膜被配置为响应于音频信号机械地振动，从而从隔膜的前面产生声音。 壳体可以被配置为机械地支撑声换能器，使得前面面向壳体的外部，并且背面面向壳体的内部。 麦克风可以设置在壳体的内部，并且可以被配置为感测由声换能器产生的组合声音和靠近声换能器的环境声音。 声导管可以耦合到麦克风并从麦克风延伸并且靠近声学换能器，使得麦克风感测靠近隔膜前部的声音。

公开(公告)号：US20140274198A1

公开(公告)日：2014-09-18

申请号：US13828823

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Antonio John Miller

IPC: G10K11/16 ,  H04W88/02

CPC classification number: H04W88/02 ,  G10K11/178 ,  G10K11/1783 ,  G10K2210/1081

Abstract: A second error microphone may be incorporated in a mobile device to allow computation of additional parameters for modifying an adaptive noise cancellation (ANC) algorithm. For example, a first and second acoustic pressure may be calculated from a first and second error microphone of the mobile device. The first and second acoustic pressure may be input to an algorithm for determining an acoustic intensity vector. The ANC algorithm may receive the acoustic intensity vector as an input, and adapt an anti-noise signal to reduce the acoustic intensity vector. Additionally, an input impedance for the error microphones may be calculated from the acoustic pressure to determine coupling between a speaker and a user's ear. The anti-noise algorithm may be adjusted or disabled when the input impedance indicates the user has removed the phone from the user's ear.

Abstract translation: 第二误差麦克风可以并入移动设备中，以允许计算用于修改自适应噪声消除（ANC）算法的附加参数。 例如，可以从移动设备的第一和第二误差麦克风计算第一和第二声压。 可以将第一和第二声压输入到用于确定声强度矢量的算法。 ANC算法可以接收声强矢量作为输入，并适应抗噪声信号以降低声强矢量。 另外，可以从声压计算误差麦克风的输入阻抗，以确定扬声器和用户的耳朵之间的耦合。 当输入阻抗指示用户从用户的耳朵移除电话时，可以调整或禁用抗噪声算法。

公开(公告)号：US20140270227A1

公开(公告)日：2014-09-18

申请号：US13829524

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Eric J. Swanson

IPC: H04R1/10 ,  G06F17/30

CPC classification number: H04R1/1025 ,  G06F17/3074 ,  H04R1/1016 ,  H04R1/1041 ,  H04R5/033 ,  H04R2201/103 ,  H04R2420/07

Abstract: A wireless earpiece may include a local memory for storing audio files that can be played back by the user. The wireless earpiece may fit entirely within the user's ear canal. Audio files, for example music files, may be loaded on the wireless earpiece by docking the wireless earpiece with a mobile device, which includes a larger memory storing the user's library of music files. The wireless earpiece may also be charged while docked with the mobile device by receiving power from the mobile device's larger battery. To provide stereo sound, two wireless earpieces may be worn by the user and docked separately with the mobile device. Each of the two wireless earpieces may store a single channel of an audio file, which is separated by the mobile device during synchronization.

Abstract translation: 无线耳机可以包括用于存储可由用户播放的音频文件的本地存储器。 无线耳机可以完全配合在用户的耳道内。 音频文件（例如音乐文件）可以通过将无线耳机与移动设备对接而被加载到无线耳机上，移动设备包括存储用户的音乐文件库的较大存储器。 无线耳机也可以通过从移动设备的较大电池接收电力而与移动设备对接而被充电。 为了提供立体声，用户可以佩戴两个无线耳机，并与移动设备单独对接。 两个无线耳机中的每一个可以存储在同步期间由移动设备分离的音频文件的单个通道。