公开(公告)号：US20160118949A1

公开(公告)日：2016-04-28

申请号：US14920698

申请日：2015-10-22

Applicant: Cirrus Logic, Inc.

Inventor： Lingli Zhang ,  Huan Wang ,  Yongjie Cheng ,  Christian Larsen

IPC: H03F3/185 ,  H03F3/217 ,  H03F1/02

CPC classification number: H03F3/185 ,  H03F1/0205 ,  H03F1/305 ,  H03F3/2171 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2200/375

Abstract: A variable ramp up/down gain in a pre-power stage block of an audio amplifier may be used to reduce audible pops and clicks output by the audio amplifier. A controller may adjust the variable ramp up/down gain during operation of the audio amplifier. The variable ramp up/down gain may be implemented as a pulse width modulation (PWM) modulator/generator with a ramp-up and ramp-down gain under control of the controller. The variable ramp up/down gain smooths transitions of the offset between a pre-power stage block and a feedback loop and thus can reduce audible pops and clicks by reducing the offset that is amplified in the power stage block of the audio amplifier.

Abstract translation: 可以使用音频放大器的功率前级块中的可变斜坡上升/下降增益来减少由音频放大器输出的声音弹出和喀哒声。 控制器可以在音频放大器的操作期间调节可变斜坡上升/下降增益。 可变斜坡上升/下降增益可以实现为在控制器的控制下具有斜升和斜降增益的脉宽调制（PWM）调制器/发生器。 可变斜坡上升/下降增益平滑了功率前级块和反馈回路之间的偏移的转换，并且因此可以通过减小在音频放大器的功率级块中放大的偏移来减少可听见的声音和咔嗒声。

公开(公告)号：US09324311B1

公开(公告)日：2016-04-26

申请号：US14210537

申请日：2014-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Ali Abdollahzadeh Milani ,  Jeffrey Alderson ,  Gautham Devendra Kamath ,  Yang Lu

IPC: H03B29/00 ,  G10K11/16

CPC classification number: G10K11/16 ,  G10K11/178 ,  G10K11/17835 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/3016 ,  G10K2210/3028 ,  G10K2210/3045 ,  G10K2210/3054

Abstract: An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal from that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. At least one microphone provides an error signal indicative of the noise cancellation at the transducer, and the coefficients of the adaptive filter are adapted to minimize the error signal. In order to prevent improper adaptation or instabilities in one or both of the adaptive filters, spikes are detected in the error signal by comparing the error signal to a threshold ambient noise average. Therefore, if the magnitude of the coefficient error is greater than a threshold value for an update, the update is skipped. Alternatively the step size of the updates may be reduced.

Abstract translation: 自适应噪声消除（ANC）电路自适应地产生从其被注入扬声器或其它换能器输出中的抗噪声信号，以引起环境声音的消除。 至少一个麦克风提供指示换能器处的噪声消除的误差信号，并且自适应滤波器的系数适于使误差信号最小化。 为了防止一个或两个自适应滤波器中的不适当的适应或不稳定性，通过将误差信号与阈值环境噪声平均值进行比较，在误差信号中检测到峰值。 因此，如果系数误差的大小大于更新的阈值，则跳过更新。 或者，可以减少更新的步长。

公开(公告)号：US09285814B1

公开(公告)日：2016-03-15

申请号：US14472110

申请日：2014-08-28

Applicant: Cirrus Logic, Inc.

Inventor： Shatam Agarwal

IPC: G05F1/56 ,  G05F1/575

CPC classification number: G05F1/575

Abstract: A feedback path may be provided within the voltage regulator to reduce the effect of a current step or load transient on the output of a voltage regulator. The feedback path may provide a fast path for stabilizing the voltage regulator after the load transient. The feedback path may be configurable to be activated or de-activated during operation of the voltage regulator. The feedback path may be activated when the voltage regulator takes over generation of an output voltage from another voltage regulator. The feedback path may then be de-activated to allow normal operation of the voltage regulator after a steady-state condition is reached.

Abstract translation: 可以在电压调节器内提供反馈路径，以减小电流步进或负载瞬变对电压调节器的输出的影响。 反馈路径可以提供用于在负载瞬变之后稳定电压调节器的快速路径。 反馈路径可以被配置为在电压调节器的操作期间被激活或去激活。 当电压调节器从另一个电压调节器接收输出电压的产生时，可以激活反馈路径。 然后反馈路径可以被去激活，以便在达到稳态条件之后允许电压调节器的正常工作。

公开(公告)号：US09253833B2

公开(公告)日：2016-02-02

申请号：US14280474

申请日：2014-05-16

Applicant: Cirrus Logic, Inc.

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

IPC: H05B37/02 ,  H05B33/08 ,  H02M3/158 ,  H02M1/00

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：US20160014507A1

公开(公告)日：2016-01-14

申请号：US14864639

申请日：2015-09-24

Applicant: Cirrus Logic, Inc.

Inventor： Jie Su

IPC: H04R3/00

CPC classification number: H04R3/007

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a controller configured to be coupled to an audio speaker, wherein the controller receives one or more signals indicative of one or more operating characteristics of the audio speaker and compares the one or more operating characteristics to one or more speaker protection thresholds, and based on the comparison, processes an audio input signal to generate an audio output signal communicated from the controller to the audio speaker, further wherein the one or more speaker protection thresholds are based on offline reliability testing of one or more audio speakers similar to the audio speaker and the controller generates one or more modeled parameters for the audio speaker and modifies the one or more speaker protection thresholds based on the one or more modeled parameters.

Abstract translation: 根据本公开的实施例，系统和方法可以包括被配置为耦合到音频扬声器的控制器，其中控制器接收指示音频扬声器的一个或多个操作特性的一个或多个信号，并将该一个或多个 对一个或多个扬声器保护阈值的操作特性，并且基于比较，处理音频输入信号以产生从控制器传送到音频扬声器的音频输出信号，其中，一个或多个扬声器保护阈值基于离线可靠性 类似于音频扬声器的一个或多个音频扬声器的测试和控制器产生用于音频扬声器的一个或多个建模参数，并且基于一个或多个建模的参数修改一个或多个扬声器保护阈值。

公开(公告)号：US20150365761A1

公开(公告)日：2015-12-17

申请号：US14304208

申请日：2014-06-13

Applicant: CIRRUS LOGIC, INC.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix ,  Dayong Zhou

IPC: H04R3/00

CPC classification number: G10K11/178 ,  G10K11/17854 ,  G10K11/17855 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/3016 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3045 ,  H04R1/1083 ,  H04R3/005 ,  H04R5/033 ,  H04R2410/05 ,  H04R2499/11

Abstract: In accordance with the present disclosure, an adaptive noise cancellation system may include a controller. The controller may be configured to determine a degree of convergence of an adaptive coefficient control block for controlling an adaptive response of the adaptive noise cancellation system. The controller may enable adaptation of the adaptive coefficient control block if the degree of convergence of the adaptive response is below a particular threshold and disable adaptation of the adaptive coefficient control block if the degree of convergence of the adaptive response is above a particular threshold, such that when the adaptive noise cancellation system is adequately converged, the adaptive noise cancellation system may conserve power by disabling one or more of its components.

Abstract translation: 根据本公开，自适应噪声消除系统可以包括控制器。 控制器可以被配置为确定用于控制自适应噪声消除系统的自适应响应的自适应系数控制块的收敛度。 如果自适应响应的收敛程度低于特定阈值，则控制器可以实现自适应系数控制块的适应，并且如果自适应响应的收敛程度高于特定阈值，则禁止自适应系数控制块的适应，如 当自适应噪声消除系统充分收敛时，自适应噪声消除系统可以通过禁用其一个或多个组件来节省功率。

公开(公告)号：US20150358718A1

公开(公告)日：2015-12-10

申请号：US14299836

申请日：2014-06-09

Applicant: Cirrus Logic, Inc.

Inventor： Roy Scott Kaller ,  Aaron Brennan

IPC: H04R1/10

CPC classification number: H04R1/1041 ,  G08G1/096791 ,  H04R1/1083

Abstract: An optical sensor may be integrated into headphones and feedback from the sensor used to adjust an audio output from the headphones. For example, an emergency vehicle traffic preemption signal may be detected by the optical sensor. Optical signals may be processed in a pattern discriminator, which may be integrated with an audio controller integrated circuit (IC). When the signal is detected, the playback of music through the headphones may be muted and/or a noise cancellation function turned off. The optical sensor may be integrated in a music player, a smart phone, a tablet, a cord-mounted module, or the earpieces of the headphones.

Abstract translation: 光学传感器可以集成到耳机中，并且来自用于调节耳机的音频输出的传感器的反馈。 例如，可以由光学传感器检测紧急车辆交通抢占信号。 光信号可以在图案鉴别器中进行处理，其可与音频控制器集成电路（IC）集成。 当检测到信号时，通过耳机播放音乐可能被静音和/或噪声消除功能关闭。 光学传感器可以集成在音乐播放器，智能电话，平板电脑，电线安装模块或耳机的耳机中。

公开(公告)号：US20150358708A1

公开(公告)日：2015-12-10

申请号：US14298379

申请日：2014-06-06

Applicant: Cirrus Logic, Inc.

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

IPC: H04R1/08 ,  H04R3/00

CPC classification number: H04R1/08 ,  H01L2224/48137 ,  H01L2924/16152 ,  H04R1/04 ,  H04R1/1083 ,  H04R3/002 ,  H04R3/005 ,  H04R2201/003 ,  H04R2410/01 ,  H04R2410/05 ,  H04R2499/11

Abstract: An audio device, in at least one embodiment, includes a device package and a plurality of microphones. The device package defines a component cavity and a plurality of vias including a first via and a second via. The vias comprise openings in the device package extending between the component cavity and an exterior. The microphones are located within the component cavity. The microphones are configured to generate electrical signals in accordance with acoustic pressure in the respective vias. A disclosed audio apparatus includes an apparatus housing and a speaker and one or more noise cancellation microphones within the frame. The speaker includes a speaker diaphragm configured to vibrate in accordance with an audio signal. The apparatus housing may define a speaker cavity configured to mechanically support the speaker diaphragm. In at least one embodiment, the audio apparatus includes a multi-microphone device including a first transducer corresponding to a first via and a second transducer corresponding to a second via. A first acoustical conduit may extend from a first end in proximity to the first via to a first exterior location and a second acoustical conduit may extend from a second end in proximity to the second via to a second exterior location.

Abstract translation: 在至少一个实施例中，音频设备包括设备包和多个麦克风。 器件封装限定了一个元件腔和多个通孔，其中包括第一通孔和第二通孔。 通孔包括在部件空腔和外部之间延伸的器件封装中的开口。 麦克风位于组件腔内。 麦克风被配置为根据相应通孔中的声压产生电信号。 所公开的音频设备包括设备外壳和扬声器以及框架内的一个或多个噪声消除麦克风。 扬声器包括配置为根据音频信号振动的扬声器振动膜。 设备壳体可以限定被配置为机械地支撑扬声器振膜的扬声器腔。 在至少一个实施例中，音频设备包括多麦克风设备，其包括对应于第一通孔的第一换能器和对应于第二通孔的第二换能器。 第一声​​导管可以从靠近第一通道的第一端延伸到第一外部位置，并且第二声导管可以从靠近第二通道的第二端延伸到第二外部位置。

公开(公告)号：US20150351178A1

公开(公告)日：2015-12-03

申请号：US14728039

申请日：2015-06-02

Applicant: Cirrus Logic, Inc.

Inventor： Zhaohui He

IPC: H05B33/08

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  H02M1/44 ,  H02M3/33523 ,  H02M3/33561 ,  H02M3/33576 ,  H02M5/2576 ,  H02M7/217 ,  H02M2001/0006 ,  H02M2001/0048 ,  H05B33/0815 ,  H05B33/0845 ,  H05B37/02 ,  Y02B20/346 ,  Y02B20/347 ,  Y02B70/126 ,  Y02B70/1491

Abstract: In at least one embodiment, an electronic system adapts current control timing for half line cycle of a phase-cut input voltage and responsively controls a dimmer current in a power converter system. The adaptive current control time and responsive current control provides, for example, interfacing with a dimmer. The electronic system and method include a dimmer, a switching power converter, and a controller to control the switching power converter and controls a dimmer current. In at least one embodiment, the controller determines a predicted time period from a zero crossing until a leading edge of a phase-cut input voltage and then responsively controls the dimmer current to, for example, reduce current and voltage perturbations (referred to as “ringing”), improve efficiency, and reduce an average amount of power handled by various circuit components.

Abstract translation: 在至少一个实施例中，电子系统适应相切切输入电压的半线周期的电流控制定时，并且响应于控制功率转换器系统中的调光器电流。 自适应电流控制时间和响应电流控制提供例如与调光器的接口。 电子系统和方法包括调光器，开关电源转换器和控制器以控制开关功率转换器并控制调光器电流。 在至少一个实施例中，控制器确定从零交叉直到相切输入电压的前沿的预测时间段，然后响应地控制调光器电流，例如减小电流和电压扰动（称为“ 振铃“），提高效率，并减少各种电路组件处理的平均功率。

公开(公告)号：US20150326187A1

公开(公告)日：2015-11-12

申请号：US14706624

申请日：2015-05-07

Applicant: Cirrus Logic, Inc.

Inventor： Siddharth Maru ,  Eric J. King

IPC: H03F1/08 ,  H03F3/217

CPC classification number: H03F1/083 ,  G05F1/575 ,  H02M3/158 ,  H03F1/0277 ,  H03F3/181 ,  H03F3/217 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/372

Abstract: A power converter may include a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, an output for producing the output voltage, wherein a first switch is coupled to a first output terminal of the output and a second switch is coupled to a second output terminal of the output, and a linear amplifier coupled to the output. The controller may be configured to, in a linear amplifier mode of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load, and in at least one mode of the power stage other than the linear amplifier mode, sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer the electrical energy from the input source to the load.

Abstract translation: 功率转换器可以包括功率电感器，多个开关，被布置成顺序地以多个开关配置工作，用于产生输出电压的输出，其中第一开关耦合到输出端的第一输出端，​​第二开关 耦合到输出的第二输出端，以及耦合到输出的线性放大器。 控制器可以被配置为在功率级的线性放大器模式中使得线性放大器能够将电能从功率级的输入源传输到负载，并且在功率级的至少一种模式中，除了 线性放大器模式，顺序地从多个开关配置施加开关配置，以选择性地激活或去激活多个开关中的每一个，以将电能从输入源传输到负载。