公开(公告)号：US20140211953A1

公开(公告)日：2014-07-31

申请号：US14228322

申请日：2014-03-28

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey Alderson ,  Nitin Kwatra ,  Gautham Devendra Kamath ,  Ali Abdollahzadeh Milani ,  John L. Melanson

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/1082 ,  G10K2210/3017 ,  G10K2210/3028 ,  G10K2210/3035 ,  G10K2210/3049 ,  G10K2210/3056 ,  G10K2210/511

Abstract: A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit that performs the adaptive noise canceling (ANC) function also either adjusts the frequency response of the anti-noise signal with respect to the reference microphone signal, and/or by adjusting the response of the adaptive filter independent of the adaptation provided by the reference microphone signal.

Abstract translation: 诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其它换能器输出中以引起环境音频声音的消除。 还可以在扬声器附近提供误差麦克风以测量换能器的输出，以便控制抗噪声信号的适应性并且估计通过换能器的噪声消除电路的电声路径。 执行自适应噪声消除（ANC）功能的处理电路还可以相对于参考麦克风信号调整抗噪声信号的频率响应，和/或通过调节独立于由 参考麦克风信号。

公开(公告)号：US20140140560A1

公开(公告)日：2014-05-22

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.

Abstract translation: 根据本公开的方法和系统，移动设备可以包括适于使得外壳容易地由移动设备的用户传输的外壳，与外壳相关联的用于产生声音的扬声器以及外壳内的控制器 通信地耦合到扬声器。 控制器可以被配置为从扬声器接收信号，所述信号至少部分地由入射在扬声器上的声音引起，而不是由扬声器产生的声音并且处理该信号。

公开(公告)号：US20140077721A1

公开(公告)日：2014-03-20

申请号：US14084662

申请日：2013-11-20

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric King

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0845 ,  H05B37/0263 ,  Y02B20/346

Abstract: A circuit for powering high-efficiency lighting devices from a thyristor-controlled dimmer operates a switching power circuit during active portions of half-cycles of the AC line voltage source that supplies the dimmer. A control circuit determines the durations of the active portions such that sufficient energy is transferred to operate the lighting devices until a next half-cycle of the AC line voltage, at which time the active portion of the half-cycle is terminated. A high impedance level is presented to the output of the dimmer until the next half-cycle commences.

Abstract translation: 用于从晶闸管控制的调光器供电高效率照明装置的电路在提供调光器的AC线路电压源的半周期的有效部分期间操作开关电源电路。 控制电路确定有效部分的持续时间，使得传送足够的能量以操作照明装置，直到AC线路电压的下一个半周期，此时半周期的有效部分终止。 高阻抗电平被提供给调光器的输出，直到下一个半周期开始。

公开(公告)号：US20130342145A1

公开(公告)日：2013-12-26

申请号：US13835101

申请日：2013-03-15

Applicant: Cirrus Logic, Inc.

Inventor： Marc John Kobayashi ,  Jason William Lawrence ,  Stephen James Sanchez ,  John L. Melanson ,  Miroslav Oljaca

IPC: H02P6/18

CPC classification number: H02P6/183 ,  H02P6/185

Abstract: The system and method disclose for the controlling of sequential phase switching in driving a set of stator windings of a multi-phase sensorless brushless permanent magnet DC motor. A motor controller controls a power stage that drives two windings of a set of three windings in the motor with pulse width modulated signal. A plurality of voltage values on an undriven winding of the set of three windings are sampled within a window of time, wherein a period beginning when the driven windings are energized and ending when the driven windings are de-energized encompasses the window of time. The sampled voltage values are processed. When the processed voltage values exceed a threshold, the motor controller changes which two windings are driven.

Abstract translation: 该系统和方法公开了用于控制驱动多相无传感器无刷永磁直流电动机的一组定子绕组中的顺序相位切换。 电机控制器控制功率级，通过脉宽调制信号驱动马达中一组三个绕组的两个绕组。 在三个绕组组中的未驱动绕组上的多个电压值在时间窗口内被采样，其中从被驱动绕组通电并且当被驱动绕组断电时结束的周期包括时间窗口。 对采样的电压值进行处理。 当处理的电压值超过阈值时，电机控制器改变驱动两个绕组。

公开(公告)号：US20130155728A1

公开(公告)日：2013-06-20

申请号：US13715451

申请日：2012-12-14

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Prashanth Drakshapalli ,  Siddharth Maru

IPC: H02M3/335

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: An electronic system and method include a controller to actively control power transfer from a primary winding of a switching power converter to an auxiliary-winding of an auxiliary power supply. The switching power converter is controlled and configured such that during transfer of power to the auxiliary-winding, the switching power converter does not transfer charge to one or more secondary-windings of the switching power converter. Thus, the switching power converter isolates one or more secondary transformer winding currents from an auxiliary-winding current. By isolating the charge delivered to the one or more secondary-windings from charge delivered to the auxiliary-winding, the controller can accurately determine an amount of charge delivered to the secondary-windings and, thus, to a load.

Abstract translation: 电子系统和方法包括控制器，用于主动地控制从开关功率转换器的初级绕组到辅助电源的辅助绕组的功率传递。 开关电源转换器被控制和配置为使得在向辅助绕组传递电力时，开关功率转换器不将电荷传送到开关功率转换器的一个或多个次级绕组。 因此，开关功率转换器将一个或多个次级变压器绕组电流与辅助绕组电流隔离。 通过将输送到一个或多个次级绕组的电荷从传送到辅助绕组的电荷隔离，控制器可以精确地确定输送到次级绕组的电荷量，从而准确地确定负载。

公开(公告)号：US20130069561A1

公开(公告)日：2013-03-21

申请号：US13673879

申请日：2012-11-09

Applicant: CIRRUS LOGIC, INC.

Inventor： John L. Melanson ,  Alfredo R. Linz ,  Michael A. Kost ,  Sahil Singh

IPC: H05B37/02

CPC classification number: H05B33/0863 ,  H05B33/0815 ,  H05B33/0866 ,  H05B33/0872

Abstract: A lighting system includes methods and systems to mix colors of light emitted from at least two LED emitters. In at least one embodiment, the lighting system includes a controller that responds to phase-cut angles of the dimming signal and correlates the phase-cut angles with a predetermined black body radiation function to dynamically adjust a color spectra of the mixed light in response to changes in phase cut angles of the phase-cut dimming level signal. In at least one embodiment, the controller utilizes the predetermined black body radiation function to dynamically adjust the color spectra of the mixed, emitted light in response to changes in phase cut angles of a phase-cut dimming level signal. In at least one embodiment, the predetermined black body radiation function specifies correlated color temperatures (CCTs) that model the CCTs of an actual non-LED based lamp, such as an incandescent lamp.

Abstract translation: 照明系统包括混合从至少两个LED发射器发射的光的颜色的方法和系统。 在至少一个实施例中，照明系统包括控制器，其对调光信号的相位角进行响应，并将相切角与预定的黑体辐射功能相关联，以响应于 切相调光电平信号的相位角变化。 在至少一个实施例中，控制器利用预定的黑体辐射功能来响应于相位切割调光电平信号的相位切换角度的变化来动态地调整混合的发射光的色谱。 在至少一个实施例中，预定黑体辐射功能规定了对诸如白炽灯的实际非LED基灯的CCT进行建模的相关色温（CCT）。