公开(公告)号：US20140266310A1

公开(公告)日：2014-09-18

申请号：US13829831

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Dan Shen ,  Lingli Zhang ,  Johann Gaboriau

IPC: H03K5/1534

CPC classification number: H03K17/133 ,  H02M2001/0009 ,  H03F3/2171

Abstract: In accordance with these and other embodiments of the present disclosure, an apparatus and a method may include receiving a first input configured to indicate an output voltage of an output node of a switched output stage comprising a pull-down driver device coupled at its non-gate terminals between a ground voltage and the output node and a pull-up driver device coupled at its non-gate terminals between a supply voltage and the output node. The method may also include receiving a second input configured to indicate a gate voltage of a gate terminal of a first one of the pull-up driver device and the pull-down driver device. The method may further include detecting direction of an output current flowing into or out of the output node based on the first input and the second input.

Abstract translation: 根据本公开的这些和其他实施例，装置和方法可以包括接收被配置为指示切换输出级的输出节点的输出电压的第一输入，包括在其非易失性存储器处耦合的下拉驱动器器件， 接地电压和输出节点之间的栅极端子和在其非栅极端子处在电源电压和输出节点之间耦合的上拉驱动器器件。 该方法还可以包括接收被配置为指示上拉驱动器器件和下拉驱动器器件中的第一个的栅极端子的栅极电压的第二输入。 该方法还可以包括基于第一输入和第二输入来检测流入或流出输出节点的输出电流的方向。

公开(公告)号：US20140254804A1

公开(公告)日：2014-09-11

申请号：US13791461

申请日：2013-03-08

Applicant: CIRRUS LOGIC, INC.

Inventor： Jie Su

IPC: H03G1/00

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：US20140028214A1

公开(公告)日：2014-01-30

申请号：US14039355

申请日：2013-09-27

Applicant: Cirrus Logic, Inc.

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

IPC: H05B33/08

CPC classification number: H05B33/0818 ,  H05B33/0815

Abstract: A controller may be configured to: (i) predict based on an electronic transformer secondary signal an estimated occurrence of a high-resistance state of a trailing-edge dimmer coupled to a primary winding of an electronic transformer, wherein the high-resistance state occurs when the trailing-edge dimmer begins phase-cutting an alternating current voltage signal; (ii) operate a power converter in a trailing-edge exposure mode for a first period of time immediately prior to the estimated occurrence of the high-resistance state, such that the power converter is enabled to transfer energy from the secondary winding to the load during the trailing-edge exposure mode; and (iii) operate the power converter in a power mode for a second period of time prior to and non-contiguous with the first period of time, such that the power converter is enabled to transfer energy from the secondary winding to the load during the power mode.

Abstract translation: 控制器可以被配置为：（i）基于电子变压器次级信号预测耦合到电子变压器的初级绕组的后缘调光器的高电阻状态的估计出现，其中发生高电阻状态 当后缘调光器开始切割交流电压信号时; （ii）在估计出现高电阻状态之前的第一时间段内以后沿曝光模式操作功率转换器，使得功率转换器能够将能量从次级绕组传递到负载 在后缘曝光模式期间; 以及（iii）在第一时间段之前和不连续的第二时间段内以功率模式操作功率转换器，使得功率转换器能够在第一时间段期间将能量从次级绕组传递到负载 电源模式。

公开(公告)号：US20140028213A1

公开(公告)日：2014-01-30

申请号：US13833587

申请日：2013-03-15

Applicant: CIRRUS LOGIC, INC.

Inventor： Mohit Sood ,  Spencer Isaacson ,  Rahul Singh ,  Zhaohui He

IPC: H03K17/14 ,  H05B33/08

CPC classification number: H02M3/33523 ,  H02M3/335 ,  H03K17/145 ,  H05B33/0815 ,  H05B33/0848 ,  H05B33/0884 ,  Y02B20/341 ,  Y10T307/406 ,  Y10T307/832

Abstract: A system and method include a controller that reduces power dissipated by a switch, such as a source-controlled field effect transistor, when an estimated amount of power dissipated by the switch exceeds a predetermined threshold. Reducing the power dissipated by the switch prevents damage to the switch due to overheating. The controller determines the estimated amount of power dissipated by the switch using actual drain-to-source current and drain voltage data. In at least one embodiment, the controller includes a fail-safe, estimated power dissipation determination path that activates when the drain voltage data fails a reliability test. Additionally, in at least one embodiment, the controller includes a model of thermal characteristics of the switch. In at least one embodiment, the controller utilizes real-time estimated power dissipation by the switch and the model to determine when the estimated power dissipated by the switch exceeds a power dissipation protection threshold.

Abstract translation: 一种系统和方法包括当由开关消耗的估计功率超过预定阈值时，降低由诸如源极控制场效应晶体管的开关消耗的功率的控制器。 降低开关消耗的功率可以防止由于过热而损坏开关。 控制器使用实际的漏极 - 源极电流和漏极电压数据确定开关耗散的功率的估计量。 在至少一个实施例中，控制器包括故障安全的估计功率耗散确定路径，当漏极电压数据失败可靠性测试时激活。 另外，在至少一个实施例中，控制器包括开关的热特性模型。 在至少一个实施例中，控制器利用开关和模型的实时估计的功率消耗来确定由开关消耗的估计功率何时超过功率耗散保护阈值。

公开(公告)号：US20140009082A1

公开(公告)日：2014-01-09

申请号：US13799329

申请日：2013-03-13

Applicant: CIRRUS LOGIC, INC.

Inventor： Eric Jerome King ,  John L. Melanson

IPC: H05B37/02

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：US20130287219A1

公开(公告)日：2013-10-31

申请号：US13795160

申请日：2013-03-12

Applicant: CIRRUS LOGIC, INC.

Inventor： Jon D. Hendrix ,  Jeffrey Alderson

IPC: G10K11/175

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 an event requiring action on the adaptation of one of the adaptive filters is detected, action is taken on the other one of the adaptive filters. Another feature of the ANC system uses microphone signals provided at both of the earspeakers to perform processing on a voice microphone signal that receives speech of the user.

Abstract translation: 包括耳式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，使得当检测到需要对自适应滤波器之一的自适应的动作的事件时，对另一个自适应滤波器采取动作。 ANC系统的另一个特征是使用在两个耳机中提供的麦克风信号对接收用户语音的语音麦克风信号进行处理。

公开(公告)号：US20040189503A1

公开(公告)日：2004-09-30

申请号：US10824575

申请日：2004-04-14

Applicant: Cirrus Logic, Inc.

Inventor： John Laurence Melanson

IPC: H03M001/82 ,  H03M003/00

CPC classification number: H03M3/372 ,  H03M3/506

Abstract: A digital to analog converter including a noise shaping modulator for modulating an input digital data stream, a plurality of output elements for generating a plurality of intermediate data streams from a modulated output stream from the modulator, and an output summer for summing the intermediate data streams to generate an output analog stream. The noise shaping modulator balances an edge transition rate of the output elements, such that the edge transition rate of two selected elements is approximately equal.

Abstract translation: 一种数模转换器，包括用于调制输入数字数据流的噪声整形调制器，用于从调制器的调制输出流产生多个中间数据流的多个输出元件，以及用于对中间数据流进行求和的输出加法器 以产生输出模拟流。 噪声整形调制器平衡输出元件的边沿跃迁速率，使得两个选定元件的边沿跃迁速率近似相等。

公开(公告)号：US20040156549A1

公开(公告)日：2004-08-12

申请号：US10361416

申请日：2003-02-10

Applicant: Cirrus Logic, Inc.

Inventor： Michael Persiantsev

IPC: G06K009/36

CPC classification number: H04N19/192 ,  H04N19/63 ,  H04N19/90

Abstract: The quality of digital images recovered from compressed data in an inter-frame redundancy-removing scheme is enhanced using a self-adaptive feedback scheme in an image compression/decompression system so as to provide for the compensation of the distortion component from prior frame compression in subsequent difference frame compression. Each transmitted frame is stored after a full compress/decompress cycle, and difference data (which includes the inverse of the distortion component from compression of the transmitted frame) representing the difference between the stored frame and the incoming new frame is transmitted. Consequently, the quality of static regions in the recovered images may be improved with each subsequent iteration by taking the distortion component in the prior frame into consideration along with the inter-frame motion information. The feedback loop thus forms a self-adaptive iterative cycle.

Abstract translation: 使用图像压缩/解压缩系统中的自适应反馈方案来增强在帧间冗余去除方案中从压缩数据中恢复的数字图像的质量，从而提供对来自先前帧压缩的失真分量的补偿 后续差异帧压缩。 每个发送的帧在完全压缩/解压缩周期之后被存储，并且发送表示存储的帧和进入的新帧之间的差异的差分数据（其包括来自压缩的发送帧的失真分量的倒数）。 因此，通过随着帧间运动信息考虑先前帧中的失真分量，每次后续迭代可以改善恢复图像中的静态区域的质量。 因此，反馈环路形成自适应迭代循环。

公开(公告)号：US20040108947A1

公开(公告)日：2004-06-10

申请号：US10643127

申请日：2003-08-18

Applicant: Cirrus Logic, Inc.

Inventor： YuQing Yang ,  John Laurence Melanson

IPC: H03M003/00

CPC classification number: H03M3/368 ,  H03M3/424 ,  H03M3/452

Abstract: An integrator stage for use in a delta sigma modulator includes an operational amplifier, an integration capacitor coupling an output of the operational amplifier and a summing node at an input of the operational amplifier, and a feedback path. The feedback path includes first and second capacitors having first plates coupled electrically in common at a common plate node and switching circuitry for sampling selected reference voltages onto second plates of the capacitors during a sampling phase. The integrator stage further includes a switch for selectively coupling the common plate node and the summing node during an integration phase.

Abstract translation: 用于Δ-Σ调制器的积分器级包括运算放大器，耦合运算放大器的输出的积分电容器和运算放大器输入端的求和节点和反馈路径。 反馈路径包括第一和第二电容器，该第一和第二电容器具有在公共板节点处共同电耦合的第一板和用于在采样阶段期间将选定的参考电压采样到电容器的第二板上的开关电路。 积分器级还包括用于在积分阶段期间选​​择性地耦合公共板节点和求和节点的开关。

公开(公告)号：US20040062182A1

公开(公告)日：2004-04-01

申请号：US10664688

申请日：2003-09-18

Applicant: Cirrus Logic, Inc.

Inventor： David Michael Pietruszynski ,  Rex Baird

IPC: G11B009/00

CPC classification number: H03F3/087 ,  G11B7/005 ,  G11B7/13 ,  H03F2200/331

Abstract: An optical disk pickup system includes an array of photodiodes 101 for converting photons reflected from an optical disk into a plurality of electrical signals each representing a channel. Driving circuitry 407, 408 drives at least one of the electrical signals as a current across a conductor of a flexible cable 403. A low impedance load 404 converts the electrical signal driven across the conductor as a current into a voltage for further processing.

Abstract translation: 光盘拾取系统包括用于将从光盘反射的光子转换为每个表示通道的多个电信号的光电二极管阵列101。 驱动电路407,408将电信号中的至少一个作为跨越柔性电缆403的导体的电流驱动。低阻抗负载404将作为电流驱动的导体的电信号转换为用于进一步处理的电压。