公开(公告)号：US09185767B2

公开(公告)日：2015-11-10

申请号：US14158445

申请日：2014-01-17

Applicant: Cirrus Logic, Inc.

Inventor： Ramin Zanbaghi ,  Arnab Kumar Dutta ,  Firas Azrai

IPC: H05B41/36 ,  H05B33/08 ,  H02M7/5383

CPC classification number: H05B33/0872 ,  H02M7/5383 ,  H05B33/0815 ,  H05B33/0866 ,  Y02B20/347 ,  Y02B70/1441

Abstract: A self-oscillating resonator (SOR) may be used to control current through light emitting diodes (LEDs). The SOR may be started and stopped by a controller coupled to a transistor switch in the SOR. The controller may output a control signal that starts and stops the SOR by coupling a supply voltage or a ground to a base of the transistor switch in the SOR. Additional control over the current output to the LEDs may be gained through a resistive DAC coupled to the SOR and duty cycling the SOR.

Abstract translation: 自振荡谐振器（SOR）可用于控制通过发光二极管（LED）的电流。 SOR可以由耦合到SOR中的晶体管开关的控制器启动和停止。 控制器可以通过在SOR中将电源电压或接地耦合到晶体管开关的基极来输出启动和停止SOR的控制信号。 可以通过耦合到SOR的电阻式DAC和SOR负载来获得对LED的电流输出的额外控制。

公开(公告)号：US20150318844A1

公开(公告)日：2015-11-05

申请号：US14270296

申请日：2014-05-05

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen

IPC: H03K3/037

CPC classification number: H03K3/0377 ,  H03F3/217 ,  H03F3/2171 ,  H03F3/2173 ,  H03K3/3565

Abstract: Voltage level shifting in a switching output stage is presented. The circuit may include a switching output stage configured to receive an analog input signal and provide a responsive digital output signal, the switching output stage having a first switching device coupled to a first supply voltage and a second switching device coupled to a second supply voltage, the first switching device and the second switching device being coupled to a common output node. The apparatus may also include a voltage level shifter circuit coupled to a switching control node of the second switching device, the voltage level shifter configured to shift a voltage level at the switching control node of the second switching device relative to the analog input signal, wherein the digital output signal at the common output node transitions as the input signal reaches a predetermined threshold value.

Abstract translation: 提出了开关输出级的电压电平转换。 电路可以包括开关输出级，其被配置为接收模拟输入信号并提供响应数字输出信号，开关输出级具有耦合到第一电源电压的第一开关器件和耦合到第二电源电压的第二开关器件， 第一开关装置和第二开关装置耦合到公共输出节点。 该装置还可以包括耦合到第二开关装置的开关控制节点的电压电平移位器电路，电压电平移位器被配置为相对于模拟输入信号移位第二开关装置的开关控制节点处的电压电平，其中 公共输出节点处的数字输出信号随着输入信号达到预定阈值而转变。

公开(公告)号：US09167664B2

公开(公告)日：2015-10-20

申请号：US13798926

申请日：2013-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Yanhui Xie ,  Eric Jerome King ,  John L. Melanson ,  Michael A. Kost

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B37/02 ,  H05B33/0803 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/383

Abstract: In accordance with these and other embodiments of the present disclosure, a system and method for providing compatibility between a load and a secondary winding of an electronic transformer driven by a trailing-edge dimmer may include predicting based on an electronic transformer secondary signal an estimated occurrence of a high-resistance state of the trailing-edge dimmer, wherein the high-resistance state occurs when the trailing-edge dimmer begins phase-cutting an alternating current voltage signal and operating the load in a high-current mode for a period of time immediately prior to the estimated occurrence of the high-resistance state.

Abstract translation: 根据本公开的这些和其他实施例，用于提供由后沿调光器驱动的电子变压器的负载和次级绕组之间的兼容性的系统和方法可以包括基于电子变压器次级信号预测估计出现 的后缘调光器的高电阻状态，其中当后沿调光器开始相位切割交流电压信号并且以高电流模式操作负载一段时间时，发生高电阻状态 紧接在估计出现高电阻状态之前。

公开(公告)号：US20150256953A1

公开(公告)日：2015-09-10

申请号：US14200458

申请日：2014-03-07

Applicant: Cirrus Logic, Inc.

Inventor： Nitin Kwatra ,  John L. Melanson

IPC: H04R29/00 ,  H04R3/00 ,  H04R1/10

CPC classification number: H04R1/1083 ,  H04R5/04 ,  H04R2410/05 ,  H04R2460/01 ,  H04R2499/11

Abstract: Based on transducer status input signals indicative of whether headphones housing respective transducers are engaged with ears of a listener, a processing circuit may determine whether the headphones are engaged with respective ears of the listener. Responsive to determining that at least one of the headphones is not engaged with its respective ear, the processing circuit may modify at least one of a first output signal to the first transducer and a second output signal to the second transducer such that at least one of the first output signal and the second output signal is different than such signal would be if the headphones were engaged with their respective ears.

Abstract translation: 基于换能器状态输入信号，指示耳机是否包含各个换能器与收听者的耳朵接合，处理电路可以确定耳机是否与收听者的相应耳朵接合。 响应于确定耳机中的至少一个不与其相应的耳朵接合，处理电路可以将第一输出信号中的至少一个修改为第一换能器，并将第二输出信号修改为第二换能器，使得至少一个 第一输出信号和第二输出信号不同于这样的信号，如果耳机与它们各自的耳朵接合。

公开(公告)号：US20150216002A1

公开(公告)日：2015-07-30

申请号：US14166211

申请日：2014-01-28

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric J. King

IPC: H05B33/08 ,  H05B37/02

CPC classification number: H05B33/0845 ,  H05B33/0803 ,  H05B33/0809 ,  H05B33/0815 ,  H05B37/02 ,  H05B39/04

Abstract: In accordance with embodiments of the present disclosure, a method and apparatus may include receiving an input waveform from a dimmer, wherein the input waveform is periodic at a first frequency. The method and apparatus may also include generating an output waveform independent of a load coupled to the output waveform, wherein the output waveform is periodic at a second frequency substantially greater than the first frequency, wherein at least one of the second frequency and an amplitude of the output waveform is based on a phase-cut angle of the input waveform indicative of a control setting of the dimmer.

Abstract translation: 根据本公开的实施例，方法和装置可以包括从调光器接收输入波形，其中输入波形是以第一频率周期性的。 所述方法和装置还可以包括生成独立于耦合到输出波形的负载的输出波形，其中输出波形在基本上大于第一频率的第二频率周期性地，其中第二频率和幅度中的至少一个 输出波形基于表示调光器的控制设置的输入波形的相位角。

公开(公告)号：US09072125B2

公开(公告)日：2015-06-30

申请号：US13799329

申请日：2013-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Eric Jerome King ,  John L. Melanson

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B37/02 ,  H05B33/0803 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/383

Abstract: An apparatus may include a controller to provide compatibility between a load and a secondary winding of a transformer driven at its primary winding by a dimmer, wherein the controller is configured to: determine from a transformer secondary signal whether the transformer comprises a magnetic transformer or an electronic transformer; and select a compatibility mode of operation from a plurality of modes of operation based on the determination of whether the transformer comprises a magnetic transformer or an electronic transformer. A method for providing compatibility between a load and a secondary winding of a transformer driven at its primary winding by a dimmer may include determining from a transformer secondary signal whether the transformer comprises a magnetic transformer or an electronic transformer and selecting a compatibility mode of operation from a plurality of modes of operation based on the determination of whether the transformer comprises a magnetic transformer or an electronic transformer.

Abstract translation: 一种装置可以包括控制器，以通过调光器提供在其初级绕组上驱动的变压器的负载和次级绕组之间的兼容性，其中所述控制器被配置为：从变压器次级信号确定变压器是否包括磁变压器或 电子变压器; 并且基于对变压器是否包括磁变压器或电子变压器的确定，从多种操作模式中选择兼容性操作模式。 用于通过调光器提供在其初级绕组上驱动的变压器的负载和次级绕组之间的兼容性的方法可以包括从变压器次级信号确定变压器是否包括磁变压器或电子变压器，并且选择兼容性操作模式 基于确定变压器是否包括磁变压器或电子变压器的多种操作模式。

公开(公告)号：US09071267B1

公开(公告)日：2015-06-30

申请号：US14480180

申请日：2014-09-08

Applicant: Cirrus Logic, Inc.

Inventor： Edmund Mark Schneider ,  Aniruddha Satoskar ,  Daniel J. Allen ,  Seyedeh Maryam Mortazavi Zanjani

IPC: H03M1/12 ,  H03M1/18 ,  H03M1/00 ,  H03M1/06 ,  H04R3/04

CPC classification number: H04R3/02 ,  H03M1/002 ,  H03M1/0631 ,  H03M1/18 ,  H03M1/181 ,  H03M1/188 ,  H03M3/466 ,  H04R3/04 ,  H04R2420/01 ,  H04R2430/03

Abstract: A processing system may include multiple selectable processing paths for processing an analog signal in order to reduce noise and increase dynamic range. Techniques are employed to transition between processing paths and calibrate operational parameters of the two paths in order to reduce or eliminate artifacts caused by switching between processing paths.

公开(公告)号：US20150163592A1

公开(公告)日：2015-06-11

申请号：US14101955

申请日：2013-12-10

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey D. Alderson

IPC: H04R3/00

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K11/17854 ,  G10K11/17881 ,  G10K2210/3017 ,  G10K2210/3051 ,  H04R2410/03

Abstract: A method may include adaptively generating an anti-noise signal from filtering a reference microphone signal with an adaptive filter in conformity with an error microphone signal and the reference microphone signal. The method may also include adjusting the response of the adaptive filter by combining injected noise with the reference microphone signal and receiving the injected noise by a copy of the adaptive filter so that the response of the copy is controlled by the adaptive filter adapting to cancel a combination of the ambient audio sounds and the injected noise and controlling the response of the adaptive filter with the coefficients adapted in the copy, whereby the injected noise is not present in the anti-noise signal and wherein each of a sample rate of the copy and a rate of adapting of the adaptive filter is significantly less than a sample rate of the adaptive filter.

Abstract translation: 一种方法可以包括自适应地产生抗噪声信号，以使用符合误差麦克风信号和参考麦克风信号的自适应滤波器对参考麦克风信号进行滤波。 该方法还可以包括通过将注入的噪声与参考麦克风信号相结合来调整自适应滤波器的响应，并通过自适应滤波器的副本接收注入的噪声，使得复制的响应由适配滤波器进行控制， 环境音频声音和注入的噪声的组合，并且利用在复制中适应的系数来控制自适应滤波器的响应，由此注入的噪声不存在于抗噪声信号中，并且其中复制和 自适应滤波器的适应率显着小于自适应滤波器的采样率。

公开(公告)号：US09000696B2

公开(公告)日：2015-04-07

申请号：US13800327

申请日：2013-03-13

Applicant: Cirrus Logic, Inc.

Inventor： Stephen James Sanchez ,  Marc John Kobayashi ,  Branislav Pjetar

IPC: H02P6/06 ,  H02P6/18

CPC classification number: H02P6/183 ,  H02P6/182

Abstract: The system discloses structure for synchronizing sequential phase switching in driving a set of stator windings of a multi-phase sensorless brushless permanent magnet DC motor. A drive voltage drives a plurality of the stator windings thereby producing a magnetic field. On an undriven stator winding among the stator windings, a voltage induced by the magnetic field is sampled. The induced voltage changes as a function of a magnetic rotor transitioning across a plurality of angular positions. A first value corresponding to the sampled voltage induced on the currentless winding is compared with a commutation threshold to determine a proper commutation point. The system is switched to a next drive configuration of the sequence when the first value surpasses the threshold.

Abstract translation: 该系统公开了用于在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使顺序相位切换同步的结构。 驱动电压驱动多个定子绕组从而产生磁场。 在定子绕组中的未驱动的定子绕组上，对由磁场引起的电压进行采样。 感应电压随着磁转子跨越多个角位置的转变而变化。 将与无电流绕组上感应的采样电压相对应的第一值与换向阈值进行比较，以确定适当的换向点。 当第一个值超过阈值时，系统切换到序列的下一个驱动器配置。

公开(公告)号：US20150078558A1

公开(公告)日：2015-03-19

申请号：US14031287

申请日：2013-09-19

Applicant: Cirrus Logic, Inc.

Inventor： Bharath Kumar Thandri ,  Vivek Jindal

IPC: H04R29/00

CPC classification number: H04R1/1041 ,  H04R5/04 ,  H04R2420/05

Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.

Abstract translation: 根据本公开的系统和方法，音频设备可以包括电气终端，音频电路和换能器负载检测电路。 电气终端可将传感器装置耦合到音频装置。 音频电路可以产生模拟音频信号，其中模拟音频信号耦合到电气终端。 换能器负载检测电路可以根据在电气端子处测量的特性将传感器装置耦合到音频装置时，检测换能器装置的负载阻抗。