公开(公告)号：US09066176B2

公开(公告)日：2015-06-23

申请号：US13950854

申请日：2013-07-25

Applicant: Cirrus Logic, Inc.

Inventor： Jon D. Hendrix ,  Ning Li ,  Jeffrey D. Alderson

IPC: H04R5/033 ,  G10K11/178 ,  H04R1/10

CPC classification number: H04R5/033 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3048 ,  G10K2210/3049 ,  H04R1/1083 ,  H04R2410/05

Abstract: In accordance with method and systems of the present disclosure, a processing circuit may implement an adaptive filter having a response that generates the anti-noise signal from the reference microphone signal to reduce the presence of the ambient audio sounds heard by the listener, a coefficient control block that shapes the response of the adaptive filter in conformity with the error microphone signal and the reference microphone signal by adapting the response of the adaptive filter to minimize the ambient audio sounds in the error microphone signal, and a coefficient bias control block which biases coefficients of the coefficient control block towards zero in a range of frequencies outside of a frequency response of the source audio signal.

Abstract translation: 根据本公开的方法和系统，处理电路可以实现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，以减少听众听到的环境音频声音的存在，系数 控制块，其通过调整自适应滤波器的响应来最小化误差麦克风信号中的环境音频声音，使自适应滤波器的响应与误差麦克风信号和参考麦克风信号一致，以及偏差的系数偏置控制块 系数控制块的系数在源音频信号的频率响应之外的频率范围内朝向零。

公开(公告)号：US20150162838A1

公开(公告)日：2015-06-11

申请号：US14102809

申请日：2013-12-11

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric J. King

IPC: H02M3/335

CPC classification number: H02M7/06 ,  H02M1/36 ,  H02M3/33507 ,  H02M2001/0006 ,  H05B33/0815 ,  Y02B20/346 ,  Y10T307/352 ,  Y10T307/50

Abstract: A system and method includes a controller that is configured to coordinate (i) a low impedance path for a dimmer current, (ii), control of switch mode power conversion and (iii) an inactive state to, for example, to allow a dimmer to function normally from cycle to cycle of an alternating current (AC) supply voltage. In at least one embodiment, the dimmer functions normally when the dimmer conducts at a correct phase angle indicated by a dimmer input setting and avoids prematurely resetting while conducting. In at least one embodiment, by coordinating functions (i), (ii), and (iii), the controller controls a power converter system that is compatible with a triac-based dimmer. In at least one embodiment, the controller coordinates functions (i), (ii), and (iii) in response to a particular dimming level indicated by a phase cut, rectified input voltage supplied to the power converter system.

Abstract translation: 一种系统和方法包括控制器，其被配置为协调（i）用于调光器电流的低阻抗路径，（ii）开关模式功率转换的控制和（iii）非活动状态，以例如允许调光器 在交流（AC）电源电压的周期到周期之间正常工作。 在至少一个实施例中，当调光器以由调光器输入设置指示的正确相位角传导时，调光器正常工作，并避免在导通时过早复位。 在至少一个实施例中，通过协调功能（i），（ii）和（iii），控制器控制与基于triac的调光器兼容的功率转换器系统。 在至少一个实施例中，控制器响应由提供给功率转换器系统的相位切断的整流输入电压指示的特定调光电平来对功能（i），（ii）和（iii）进行协调。

公开(公告)号：US09000680B2

公开(公告)日：2015-04-07

申请号：US14010087

申请日：2013-08-26

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  John J. Paulos

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B37/0209 ,  H05B33/0809 ,  H05B33/0848 ,  H05B37/02

Abstract: A system and method map dimming levels of a lighting dimmer to light source control signals using a predetermined lighting output function. The dimmer generates a dimmer output signal value. At any particular period of time, the dimmer output signal value represents one of multiple dimming levels. In at least one embodiment, the lighting output function maps the dimmer output signal value to a dimming value different than the dimming level represented by the dimmer output signal value. The lighting output function converts a dimmer output signal values corresponding to measured light levels to perception based light levels. A light source driver operates a light source in accordance with the predetermined lighting output function. The system and method can include a filter to modify at least a set of the dimmer output signal values prior to mapping the dimmer output signal values to a new dimming level.

Abstract translation: 系统和方法使用预定的照明输出功能将照明调光器的调光水平映射到光源控制信号。 调光器产生调光输出信号值。 在任何特定时间段，调光器输出信号值表示多个调光电平之一。 在至少一个实施例中，照明输出功能将调光器输出信号值映射到与由调光器输出信号值表示的调光电平不同的调光值。 照明输出功能将对应于测量光级的调光输出信号值转换为基于感知的光级。 光源驱动器根据预定的照明输出功能操作光源。 该系统和方法可以包括滤波器，以在将调光器输出信号值映射到新的调光电平之前修改至少一组调光输出信号值。

公开(公告)号：US20150078572A1

公开(公告)日：2015-03-19

申请号：US14026021

申请日：2013-09-13

Applicant: Cirrus Logic, Inc.

Inventor： Ali Abdollahzadeh Milani

IPC: G10K11/175

CPC classification number: G10K11/1788 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/30232 ,  G10K2210/3045 ,  G10K2210/3049 ,  H03F1/0211 ,  H03F3/181 ,  H03F3/52

Abstract: A processing circuit may include: (i) an adaptive filter having a response that generates an anti-noise signal from a reference microphone signal, wherein the response is shaped in conformity with the reference microphone signal and a playback corrected error, and wherein the playback corrected error is based on a difference between an error microphone signal and a secondary path estimate; (ii) a secondary path estimate filter configured to model an electro-acoustic path of a source audio signal and having a response that generates a secondary path estimate from the source audio signal; (iii) a secondary coefficient control block that shapes the response of the secondary path estimate filter in conformity with the source audio signal and the playback corrected error by adapting the response of the secondary path estimate filter to minimize the playback corrected error; and (iv) a noise injection portion for injecting a noise signal into the source audio signal, wherein the noise signal is shaped based on the playback corrected error.

Abstract translation: 处理电路可以包括：（i）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，其中所述响应根据所述参考麦克风信号和回放校正误差整形，并且其中所述播放 校正误差基于误差麦克风信号和次要路径估计之间的差异; （ii）二次路径估计滤波器，被配置为对源音频信号的电声路径建模并具有从源音频信号产生次路径估计的响应; （iii）次要系数控制块，其通过适应次要路径估计滤波器的响应来最小化重放校正误差来对根据源音频信号和回放校正误差的二次路径估计滤波器的响应进行调整; 以及（iv）用于将噪声信号注入到源音频信号中的噪声注入部分，其中基于重放校正误差对噪声信号进行成形。

公开(公告)号：US20150061536A1

公开(公告)日：2015-03-05

申请号：US14266003

申请日：2014-04-30

Applicant: Cirrus Logic, Inc.

Inventor： Yanhui Xie ,  Sahil Singh ,  Michael A. Kost

IPC: H05B33/08 ,  H02M3/335

CPC classification number: H05B33/0845 ,  H02M1/425 ,  H05B33/0815 ,  Y02B70/126

Abstract: In accordance with embodiments of the present disclosure, an apparatus may comprise a controller to provide compatibility between a load and a secondary winding of an electronic transformer. The controller may be configured to operate a single-stage power converter in a first power mode for a first period of time, such that the single-stage power converter is enabled to transfer energy from the secondary winding to the load during the first power mode and operate the single-stage power converter in a second power mode for a second period of time prior to the first period of time, such that the single-stage power converter is enabled to transfer energy from the secondary winding to the load during the second power mode, wherein the first power mode and the second power mode occur within a half-line cycle of an electronic transformer secondary signal present on the secondary winding.

Abstract translation: 根据本公开的实施例，装置可以包括控制器，以提供电子变压器的负载和次级绕组之间的兼容性。 控制器可以被配置为在第一时间段内以第一功率模式操作单级功率转换器，使得单级功率转换器能够在第一功率模式期间将能量从次级绕组传递到负载 以及在所述第一时间段之前的第二时间段内以第二功率模式操作所述单级功率转换器，使得所述单级功率转换器能够在第二时间段期间将能量从所述次级绕组传递到所述负载 功率模式，其中第一功率模式和第二功率模式发生在次级绕组上存在的电子变压器次级信号的半线周期内。

公开(公告)号：US08963449B2

公开(公告)日：2015-02-24

申请号：US13917194

申请日：2013-06-13

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson

IPC: H05B37/02 ,  H05B33/08 ,  H03K17/18 ,  H03K17/567 ,  H03K17/687 ,  H03K17/74

CPC classification number: H05B33/0815 ,  H03K17/18 ,  H03K17/567 ,  H03K17/687 ,  H03K17/6872 ,  H03K17/74 ,  H05B33/0809 ,  H05B33/0818 ,  H05B33/0845 ,  H05B33/0848 ,  H05B33/0851 ,  H05B33/0887 ,  Y02B20/346 ,  Y02B20/347 ,  Y10S315/04 ,  Y10S323/905

Abstract: A light emitting diode (LED) lighting system includes a power factor correction (PFC) controller that determines at least one power factor correction control parameter from phase delays of a phase modulated signal. In at least one embodiment, a peak voltage of the phase modulated signal is a PFC control parameter used by the PFC controller to control power factor correction and generation of a link voltage by a PFC LED driver circuit. The phase delays. are related to a peak voltage of the phase modulated signal. Thus, in at least one embodiment, detecting the phase delay in one or more cycles of the phase modulated signal allows the PFC controller to determine the peak voltage of the phase modulated signal.

Abstract translation: 发光二极管（LED）照明系统包括功率因数校正（PFC）控制器，其从相位调制信号的相位延迟确定至少一个功率因数校正控制参数。 在至少一个实施例中，相位调制信号的峰值电压是由PFC控制器使用的PFC控制参数，以通过PFC LED驱动器电路来控制功率因数校正和产生链路电压。 相位延迟。 与相位调制信号的峰值电压有关。 因此，在至少一个实施例中，在相位调制信号的一个或多个周期中检测相位延迟允许PFC控制器确定相位调制信号的峰值电压。

公开(公告)号：US08952625B2

公开(公告)日：2015-02-10

申请号：US14057982

申请日：2013-10-18

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson

IPC: H05B41/16

CPC classification number: H05B33/0815 ,  H05B33/0818 ,  Y02B20/347 ,  Y10S315/04

Abstract: A light emitting diode (LED) lighting system includes a PFC and output voltage controller and a LED lighting power system. The controller advantageously operates from an auxiliary voltage less than a link voltage generated by the LED lighting power system. The common reference voltage allows all the components of lighting system to work together. A power factor correction switch and an LED drive current switch are coupled to the common reference node and have control node-to-common node, absolute voltage that allows the controller to control the conductivity of the switches. The LED lighting system can utilize feed forward control to concurrently modify power demand by the LED lighting power system and power demand of one or more LEDs. The LED lighting system can utilize a common current sense device to provide a common feedback signal to the controller representing current in at least two of the LEDs.

Abstract translation: 发光二极管（LED）照明系统包括PFC和输出电压控制器以及LED照明电源系统。 控制器有利地从小于由LED照明电力系统产生的链路电压的辅助电压进行操作。 公共参考电压允许照明系统的所有组件一起工作。 功率因数校正开关和LED驱动电流开关耦合到公共参考节点并具有控制节点到公共节点，允许控制器控制开关的电导率的绝对电压。 LED照明系统可以利用前馈控制来同时修改LED照明电源系统的功率需求和一个或多个LED的功率需求。 LED照明系统可以利用公共电流检测装置向控制器提供公共反馈信号，该控制器表示至少两个LED中的电流。

公开(公告)号：US20150030183A1

公开(公告)日：2015-01-29

申请号：US14182798

申请日：2014-02-18

Applicant: CIRRUS LOGIC, INC.

Inventor： Ullas Pazhayaveetil ,  Jeffrey May ,  Anu Chakravarty ,  Gautham Kamath ,  John Tucker ,  Christian Larsen

IPC: H03G3/00

CPC classification number: H02M3/158 ,  G01R21/06 ,  G01R27/2611 ,  G06F1/3203 ,  H02M3/156 ,  H03F3/187 ,  H03F3/2175 ,  H03G3/004

Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.

Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。

公开(公告)号：US20140358552A1

公开(公告)日：2014-12-04

申请号：US13907679

申请日：2013-05-31

Applicant: Cirrus Logic, Inc.

Inventor： Jefferson L. Xu

IPC: G06F1/32 ,  G06F3/16

CPC classification number: G06F1/3215 ,  G06F1/3231 ,  G10L25/78 ,  G10L2025/783 ,  Y02D10/173

Abstract: A staged processing system may be configured to reduce power consumption during voice detection in an audio signal. A first stage may include detecting a minimal threshold of sound in an audio signal. A second stage may then be activated to apply a Teager operator to determine a signal-to-noise ratio of speech energy in an audio signal. When a minimum SNR is detected, a third stage may be activated to detect periodicity in the audio signal and identify a voice signal in the audio signal. When a voice signal is detected, a fourth stage may be activated to process the voice command.

Abstract translation: 分级处理系统可以被配置为在音频信号中的语音检测期间降低功耗。 第一级可以包括检测音频信号中的声音的最小阈值。 然后可以激活第二阶段以应用Teager操作者来确定音频信号中的语音能量的信噪比。 当检测到最小SNR时，可以激活第三级以检测音频信号中的周期性并识别音频信号中的语音信号。 当检测到语音信号时，可以激活第四级来处理语音命令。

公开(公告)号：US20140307899A1

公开(公告)日：2014-10-16

申请号：US13950854

申请日：2013-07-25

Applicant: Cirrus Logic, Inc.

Inventor： Jon D. Hendrix ,  Ning Li ,  Jeffrey D. Alderson

IPC: G10K11/16 ,  H04R5/033

CPC classification number: H04R5/033 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3048 ,  G10K2210/3049 ,  H04R1/1083 ,  H04R2410/05

Abstract: In accordance with method and systems of the present disclosure, a processing circuit may implement an adaptive filter having a response that generates the anti-noise signal from the reference microphone signal to reduce the presence of the ambient audio sounds heard by the listener, a coefficient control block that shapes the response of the adaptive filter in conformity with the error microphone signal and the reference microphone signal by adapting the response of the adaptive filter to minimize the ambient audio sounds in the error microphone signal, and a coefficient bias control block which biases coefficients of the coefficient control block towards zero in a range of frequencies outside of a frequency response of the source audio signal.

Abstract translation: 根据本公开的方法和系统，处理电路可以实现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，以减少听众听到的环境音频声音的存在，系数 控制块，其通过调整自适应滤波器的响应来最小化误差麦克风信号中的环境音频声音，使自适应滤波器的响应与误差麦克风信号和参考麦克风信号一致，以及偏差的系数偏置控制块 系数控制块的系数在源音频信号的频率响应之外的频率范围内朝向零。