公开(公告)号：US20140270208A1

公开(公告)日：2014-09-18

申请号：US13844602

申请日：2013-03-15

Applicant: CIRRUS LOGIC, INC.

Inventor： Antonio John Miller ,  Jie Su

IPC: H04R29/00

CPC classification number: H04R3/005 ,  H04R2410/05 ,  H04R2499/11

Abstract: Coupling between a user's ear and a speaker of a mobile device may be determined by measuring an impedance of the speaker. When the user presses the mobile device against the user's ear, the speaker impedance changes as a result of loading in the speaker's acoustic radiation impedance. The speaker impedance change may be correlated with the force applied by the user to the mobile device. The measured speaker impedance may be provided as feedback to an adaptive noise cancellation (ANC) algorithm to adjust the output at the speaker. For example, when the mobile device is removed from the user's ear, the ANC algorithm may be muted.

Abstract translation: 可以通过测量扬声器的阻抗来确定用户的耳朵和移动设备的扬声器之间的耦合。 当用户将用户的耳朵按压移动设备时，由于扬声器的声辐射阻抗的加载，扬声器的阻抗会改变。 扬声器阻抗变化可能与用户对移动设备施加的力相关。 所测量的扬声器阻抗可以被提供为自适应噪声消除（ANC）算法的反馈，以调整扬声器处的输出。 例如，当从用户的耳朵移除移动设备时，ANC算法可以被静音。

公开(公告)号：US20140266109A1

公开(公告)日：2014-09-18

申请号：US13829945

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Lingli Zhang ,  Dan Shen ,  Johann Gaboriau

IPC: H02M1/15

CPC classification number: H02M1/15 ,  H02M3/1588 ,  H03K17/162 ,  H03K2217/0063 ,  Y02B70/1466

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include an input configured to indicate a switching node voltage of a switching node of a power converter comprising a first switch device coupled at its non-gate terminals between a ground voltage and the switching node and a second switch device coupled at its non-gate terminals between an output supply node and the switching node. The systems and methods may also include a predriver circuit coupled to the input and a gate terminal of the first switch device, the predriver circuit configured to drive an input voltage signal to the gate terminal of the first switch device and configured to select an effective impedance of the gate terminal of the first switch device based on the input.

Abstract translation: 根据本公开的实施例，系统和方法可以包括被配置为指示功率转换器的开关节点的开关节点电压的输入，该功率转换器的开关节点包括在其非栅极端子处接地电压和开关 节点和第二开关器件，其在非栅极端子处耦合在输出电源节点和开关节点之间。 所述系统和方法还可以包括耦合到第一开关器件的输入端和栅极端子的预驱动电路，该预驱动电路被配置为将输入电压信号驱动到第一开关器件的栅极端并被配置为选择有效阻抗 基于输入的第一开关装置的栅极端子。

公开(公告)号：US20140265933A1

公开(公告)日：2014-09-18

申请号：US14101963

申请日：2013-12-10

Applicant: Cirrus Logic, Inc.

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

IPC: H05B33/08

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

Abstract: Systems and methods for learning dimmer characteristics provide improved efficiency in operating lighting devices. In one embodiment, an apparatus includes a lamp controller that is configured to monitor voltage information associated with one or more lamps or a dimmer of a system, adjust one or more parameters of an attach current profile in conformity with the voltage information to arrive at a selected attach current profile, and apply within the system the selected attach current profile.

Abstract translation: 用于学习调光特性的系统和方法提高了操作照明装置的效率。 在一个实施例中，一种装置包括灯控制器，其被配置为监视与一个或多个灯或系统的调光器相关联的电压信息，根据电压信息调整附接电流曲线的一个或多个参数以达到 选择附加电流配置文件，并在系统中应用所选的连接电流配置文件。

公开(公告)号：US20140265893A1

公开(公告)日：2014-09-18

申请号：US14212546

申请日：2014-03-14

Applicant: Cirrus Logic, Inc.

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

IPC: H05B33/08

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：US08804974B1

公开(公告)日：2014-08-12

申请号：US13022019

申请日：2011-02-07

Applicant: John L. Melanson

Inventor： John L. Melanson

IPC: H03G3/00

CPC classification number: G10L15/20 ,  H03G3/32 ,  H03G9/005 ,  H03G9/025

Abstract: Ambient audio event detection in a personal audio device headset provides for directive response to external audible events. Depending on the type of event, an alert may be issued, speech may be communicated to another device, program material may be interrupted and/or resumed with or without repositioning, and program material may be modified or selected for compatibility with, or to overcome, the ambient environment indicated by the detected event.

Abstract translation: 个人音频设备耳机中的环境音频事件检测提供了对外部听觉事件的指导性响应。 根据事件的类型，可以发出警报，语音可以被传送到另一个设备，节目材料可以被中断和/或恢复或不重新定位，并且程序材料可以被修改或选择以兼容或克服 ，由检测到的事件指示的环境环境。

公开(公告)号：US20140167652A1

公开(公告)日：2014-06-19

申请号：US13903632

申请日：2013-05-28

Applicant: Cirrus Logic, Inc.

Inventor： Eric J. King ,  Daniel J. Baker ,  John L. Melanson

IPC: H05B33/08

CPC classification number: F21V23/02 ,  H05B33/0815

Abstract: In accordance with systems and methods of the present disclosure, an apparatus may include a power converter and a controller. The controller may be configured to monitor a voltage at an input of the power converter, cause the power controller to transfer energy from the input to a load at a target current, decrease the target current responsive to determining that the voltage is less than or equal to an undervoltage threshold, and increase the target current responsive to determining that the voltage is greater than or equal to a maximum threshold voltage.

Abstract translation: 根据本公开的系统和方法，装置可以包括功率转换器和控制器。 控制器可以被配置为监视功率转换器的输入处的电压，使得功率控制器将能量从输入传递到目标电流的负载，响应于确定电压小于或等于 响应于确定电压大于或等于最大阈值电压而增加目标电流。

公开(公告)号：US20140009078A1

公开(公告)日：2014-01-09

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

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：US08610364B2

公开(公告)日：2013-12-17

申请号：US13194808

申请日：2011-07-29

Applicant: John L. Melanson ,  Eric J. King

Inventor： John L. Melanson ,  Eric J. King

IPC: H05B37/00 ,  H05B37/02

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：US08587211B2

公开(公告)日：2013-11-19

申请号：US13473839

申请日：2012-05-17

Applicant: John L. Melanson

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.

公开(公告)号：US20130301846A1

公开(公告)日：2013-11-14

申请号：US13784018

申请日：2013-03-04

Applicant: CIRRUS LOGIC, INC.

Inventor： Jeffrey Alderson ,  Jon D. Hendrix ,  Dayong Zhou

IPC: H04R3/00

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/3012 ,  G10K2210/30231 ,  G10K2210/3025 ,  G10K2210/3028 ,  G10K2210/30391 ,  G10K2210/3226 ,  G10K2210/503 ,  H04R1/1083 ,  H04R3/00

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 detects frequency-dependent characteristics in and/or direction of the ambient sounds and alters adaptation of the noise canceling circuit in response to the detection.

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）功能的处理电路还检测环境声音和/或方向上的频率相关特性，并且响应于检测改变噪声消除电路的适应。