公开(公告)号：US09101010B2

公开(公告)日：2015-08-04

申请号：US14212546

申请日：2014-03-14

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric King ,  Siddharth Maru

IPC: H02M1/36 ,  H05B33/08 ,  H05B39/04

CPC classification number: H05B33/0806 ,  H05B33/0845 ,  H05B33/0848 ,  H05B39/044 ,  Y02B20/383

Abstract: A circuit for powering high-efficiency lighting devices from a thyristor-controlled dimmer includes a power converter for powering the high-efficiency lighting devices from input terminals of the circuit. The circuit also includes a control circuit that controls the input current drawn by the input terminals at least while the power converter transfers energy to the lighting devices. The circuit also includes a sensing circuit that determines or measures at least one attach current characteristic at the input terminals and stores an indication of the characteristic for subsequent operation of the control circuit.

Abstract translation: 用于从晶闸管控制的调光器为高效照明装置供电的电路包括用于从电路的输入端为高效照明装置供电的电力转换器。 该电路还包括控制电路，其至少在电力转换器将能量传递到照明装置时，控制由输入端子汲取的输入电流。 电路还包括感测电路，其确定或测量输入端子处的至少一个附着电流特性，并存储用于控制电路的后续操作的特性指示。

公开(公告)号：US09093941B2

公开(公告)日：2015-07-28

申请号：US13826898

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

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

IPC: H02P6/18

CPC classification number: H02P6/183 ,  H02P6/185

Abstract: A system is disclosed for controlling motor switching in a sensorless BLDC motor having a set of three stator windings. A controller unit includes a control signal generator, a memory device, a processing unit, a signal acquisition device, and an analog-to-digital converter. A power stage having a plurality of switches receives a control signal from the control signal generator and a power signal from a power source. The power stage drives two windings of the set of three stator windings with an asymmetric pulse width modulation signal and leaves one stator of the three stator windings undriven. The processing unit acquires a demodulated measured voltage on the undriven winding. The processing unit also communicates with the power stage to change which two windings of the three stator windings are driven when the demodulated measured voltage surpasses a threshold.

Abstract translation: 公开了一种用于控制具有一组三个定子绕组的无传感器BLDC电动机中的电动机开关的系统。 控制器单元包括控制信号发生器，存储器件，处理单元，信号采集器件和模数转换器。 具有多个开关的功率级从控制信号发生器接收控制信号和来自电源的功率信号。 功率级通过不对称的脉宽调制信号驱动三组定子绕组的两个绕组，并使三个定子绕组中的一个定子不分流。 处理单元获取未驱动绕组上的解调测量电压。 当解调的测量电压超过阈值时，处理单元还与功率级进行通信，以改变三个定子绕组的两个绕组的驱动。

公开(公告)号：US20150208484A1

公开(公告)日：2015-07-23

申请号：US14676449

申请日：2015-04-01

Applicant: Cirrus Logic Inc.

Inventor： John L. Melanson ,  John J. Paulos

IPC: H05B37/02

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：US09076427B2

公开(公告)日：2015-07-07

申请号：US13787906

申请日：2013-03-07

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey Alderson ,  Jon D. Hendrix ,  Yang Lu

IPC: A61F11/06 ,  G10K11/16 ,  G10K11/178

CPC classification number: G10K11/16 ,  G10K11/17819 ,  G10K11/17833 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/3023 ,  G10K2210/3055 ,  G10K2210/503 ,  G10K2210/505 ,  G10K2210/506

Abstract: A personal audio device, such as a wireless telephone, generates an anti-noise signal from a microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The microphone measures the ambient environment, but also contains a component due to the transducer acoustic output. An adaptive filter is used to estimate the electro-acoustical path from the noise-canceling circuit through the transducer to the at least one microphone so that source audio can be removed from the microphone signal. A determination of the relative amount of the ambient sounds present in the microphone signal versus the amount of the transducer output of the source audio present in the microphone signal is made to determine whether to update the adaptive response.

Abstract translation: 诸如无线电话的个人音频设备从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他换能器输出中以引起环境声音的消除。 麦克风测量周围环境，但由于传感器的声音输出，也包含一个组件。 自适应滤波器用于估计从噪声消除电路通过换能器到至少一个麦克风的电声路径，从而可以从麦克风信号中去除源音频。 确定麦克风信号中存在的环境声音的相对量与麦克风信号中存在的源音频的换能器输出的量的确定以确定是否更新自适应响应。

公开(公告)号：US20150189434A1

公开(公告)日：2015-07-02

申请号：US14656124

申请日：2015-03-12

Applicant: Cirrus Logic, Inc.

Inventor： Jon D. Hendrix ,  Jeffrey Alderson

IPC: H04R3/00

CPC classification number: H04R3/002 ,  G10K11/175 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/30391 ,  G10K2210/3055 ,  G10K2210/503

Abstract: A personal audio device including earspeakers, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each earspeaker from at least one microphone signal that measures the ambient audio, and the anti-noise signals are combined with source audio to provide outputs for the earspeakers. The anti-noise signals cause cancellation of ambient audio sounds at the respective earspeakers. A processing circuit uses the microphone signal(s) to generate the anti-noise signals, which can be generated by adaptive filters. The processing circuit controls adaptation of the adaptive filters such that when the processing circuit detects that either of the earspeakers are off-ear, a gain applied to the anti-noise signals is reduced.

Abstract translation: 一种包括耳朵扬声器的个人音频设备包括自适应噪声消除（ANC）电路，其自适应地从测量环境音频的至少一个麦克风信号为每个耳塞产生抗噪声信号，并且抗噪声信号与源音频 为耳机提供输出。 抗噪声信号会引起相应耳机扬声器环境声音的消除。 处理电路使用麦克风信号来产生可由自适应滤波器产生的抗噪声信号。 处理电路控制自适应滤波器的自适应，使得当处理电路检测到任一个耳机是脱耳机时，降低了对抗噪声信号的增益。

公开(公告)号：US09071144B2

公开(公告)日：2015-06-30

申请号：US13715584

申请日：2012-12-14

Applicant: Cirrus Logic, Inc.

Inventor： Zhaohui He

IPC: H05B37/02 ,  H02M3/335 ,  H02M5/257 ,  H02M7/217 ,  H02M1/42 ,  H02M1/44 ,  H05B33/08 ,  H02M1/00

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：US20150171889A1

公开(公告)日：2015-06-18

申请号：US14636417

申请日：2015-03-03

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Rahul Singh ,  Prashanth Drakshapalli ,  Dale Brummel ,  Stephen T. Hodapp

IPC: H03M3/00 ,  G01V1/18

CPC classification number: G01V1/181 ,  H03M3/424 ,  H03M3/45 ,  H03M3/454

Abstract: A low power analog-to-digital converter configured to sense sensor signals may include a loop filter and a feedback digital-to-analog converter. The loop filter may have a loop filter input configured to receive an input current signal from a sensor and generate an output signal responsive to the input current signal. The feedback digital-to-analog converter may have a feedback output configured to generate a current-mode or charge-mode feedback output signal responsive to the output signal, the feedback output coupled to the loop filter input in order to combine the input current signal and the feedback output signal at the input.

Abstract translation: 被配置为感测传感器信号的低功率模数转换器可以包括环路滤波器和反馈数模转换器。 环路滤波器可以具有环路滤波器输入，其被配置为从传感器接收输入电流信号，并响应于输入电流信号产生输出信号。 反馈数模转换器可以具有被配置为响应于输出信号产生电流模式或电荷模式反馈输出信号的反馈输出，反馈输出耦合到环路滤波器输入，以便组合输入电流信号 和输入端的反馈输出信号。

公开(公告)号：US20150171853A1

公开(公告)日：2015-06-18

申请号：US14104137

申请日：2013-12-12

Applicant: Cirrus Logic, Inc.

Inventor： Eric J. King ,  John L. Melanson

IPC: H03K17/13 ,  H05B33/08

CPC classification number: H03K17/13 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/346

Abstract: In at least one embodiment, the controller senses a leading edge, phase cut AC input voltage value to a switching power converter during a cycle of the AC input voltage. The controller senses the voltage value at a time prior to a zero crossing of the AC input voltage and utilizes the voltage value to determine the approximate zero crossing. In at least one embodiment, by determining an approximate zero crossing of the AC input voltage, the controller is unaffected by any disturbances of the dimmer that could otherwise make detecting the zero crossing problematic. The particular way of determining an approximate zero crossing is a matter of design choice. In at least one embodiment, the controller approximates the AC input voltage using a function that estimates a waveform of the AC input voltage and determines the approximate zero crossing of the AC input voltage from the approximation of the AC input voltage.

Abstract translation: 在至少一个实施例中，控制器在交流输入电压的周期期间感测到开关功率转换器的前沿，相切割AC输入电压值。 控制器感测交流输入电压过零之前的电压值，并利用电压值来确定近似过零点。 在至少一个实施例中，通过确定AC输入电压的近似零交叉，控制器不受调光器的任何干扰影响，否则可能会使检测到零交叉问题。 确定近似过零点的具体方法是设计选择的问题。 在至少一个实施例中，控制器使用估计AC输入电压的波形的函数来近似AC输入电压，并根据AC输入电压的近似确定AC输入电压的近似过零点。

公开(公告)号：US20150161980A1

公开(公告)日：2015-06-11

申请号：US14101777

申请日：2013-12-10

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson ,  Jon D. Hendrix

IPC: G10K11/175

CPC classification number: H04R3/04 ,  G10K11/178 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  H04R2410/05

Abstract: In accordance with systems and methods of the present disclosure, a method may include receiving an error microphone signal indicative of an acoustic output of a transducer and ambient audio sounds at the acoustic output of the transducer. The method may also include generating an anti-noise signal to reduce the presence of the ambient audio sounds at the acoustic output of the transducer based at least on the error microphone signal. The method may further include generating an equalized source audio signal from a source audio signal by adapting, based at least on the error microphone signal, a response of the adaptive playback equalization system to minimize a difference between the source audio signal and the error microphone signal. The method may additionally include combining the anti-noise signal with the equalized source audio signal to generate an audio signal provided to the transducer.

Abstract translation: 根据本公开的系统和方法，一种方法可以包括接收指示换能器的声输出的误差麦克风信号和在换能器的声输出处的环境声音。 该方法还可以包括生成抗噪声信号以至少基于误差麦克风信号来减小在换能器的声输出处的环境音频声音的存在。 该方法还可以包括：通过至少基于误差麦克风信号，适应自适应回放均衡系统的响应来最小化源音频信号和误差麦克风信号之间的差异，从源音频信号产生均衡的源音频信号 。 该方法可以另外包括将抗噪声信号与均衡源音频信号组合以产生提供给换能器的音频信号。

公开(公告)号：US09008344B2

公开(公告)日：2015-04-14

申请号：US13915767

申请日：2013-06-12

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric Swanson

IPC: H04R9/08 ,  H04R1/04 ,  H04W52/02 ,  H04R1/02 ,  H04M1/00

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。