公开(公告)号：US20160286310A1

公开(公告)日：2016-09-29

申请号：US14975015

申请日：2015-12-18

Applicant: Cirrus Logic, Inc.

Inventor： Tejasvi Das ,  John L. Melanson

IPC: H04R3/04

CPC classification number: H04R3/04 ,  G10L19/167 ,  G10L21/0324 ,  H03G7/007 ,  H03G9/005 ,  H03M1/00 ,  H03M1/12 ,  H03M1/1225 ,  H03M1/18 ,  H03M2201/4135 ,  H04L1/20 ,  H04L27/2647 ,  H04R2430/01 ,  H04R2430/03

Abstract: In accordance with embodiments of the present disclosure, a multichip circuit for processing audio signals having dynamic range enhancement information over two or more integrated circuits may include a host integrated circuit and a client integrated circuit. The host integrated circuit may be configured to determine a dynamic range enhancement gain for a digital audio input signal, process the digital audio input signal in accordance with the dynamic range enhancement gain, and transmit audio data based on the processed digital audio input signal. The client integrated circuit may be coupled to the host integrated circuit and may be configured to receive the audio data and wherein the client integrated circuit is provided with the dynamic range enhancement gain and the client integrated circuit is configured to process the audio data with the dynamic range enhancement gain.

Abstract translation: 根据本公开的实施例，用于处理在两个或多个集成电路上具有动态范围增强信息的音频信号的多芯片电路可以包括主机集成电路和客户端集成电路。 主机集成电路可以被配置为确定用于数字音频输入信号的动态范围增强增益，根据动态范围增强增益处理数字音频输入信号，并且基于处理的数字音频输入信号发送音频数据。 客户端集成电路可以耦合到主机集成电路，并且可以被配置为接收音频数据，并且其中向客户端集成电路提供动态范围增强增益，并且客户端集成电路被配置为使用动态范围处理音频数据 范围增强增益。

公开(公告)号：US09253833B2

公开(公告)日：2016-02-02

申请号：US14280474

申请日：2014-05-16

Applicant: Cirrus Logic, Inc.

Inventor： Ramin Zanbaghi ,  John L. Melanson ,  Jieyeon Choi

IPC: H05B37/02 ,  H05B33/08 ,  H02M3/158 ,  H02M1/00

CPC classification number: H05B33/0815 ,  H02M3/158 ,  H02M2001/0009 ,  H05B33/0845 ,  Y02B20/346

Abstract: A power stage for light emitting diode (LED)-based light bulbs may include a bipolar junction transistor (BJT). The base of BJT switch may be biased externally and the operation of the BJT may be through a single pin to the emitter of the BJT. A controller integrated circuit (IC) may control the power stage through the main BJT's emitter pin in an emitter-controlled BJT-based power stage. The emitter-controlled BJT-based power stage may replace the conventional buck-boost power stage topology. For example, the controller may activate and deactivate a switch coupling the BJT's emitter to ground. A power supply for the controller IC may be charged from a reverse recovery of charge from the BJT, and the reverse recovery controlled by the controller IC.

Abstract translation: 基于发光二极管（LED）的灯泡的功率级可以包括双极结型晶体管（BJT）。 BJT开关的基极可能被外部偏置，并且BJT的操作可能通过BJT的发射极的单个引脚。 控制器集成电路（IC）可以通过发射极控制的基于BJT的功率级中的主BJ​​T发射极引脚来控制功率级。 基于发射极控制的基于BJT的功率级可以取代传统的降压 - 升压功率级拓扑。 例如，控制器可以激活和去激活将BJT的发射极耦合到地的开关。 用于控制器IC的电源可以从BJT的反向恢复电荷和由控制器IC控制的反向恢复来充电。

公开(公告)号：US20150358708A1

公开(公告)日：2015-12-10

申请号：US14298379

申请日：2014-06-06

Applicant: Cirrus Logic, Inc.

Inventor： Jens-Peter B. Axelsson ,  John L. Melanson

IPC: H04R1/08 ,  H04R3/00

CPC classification number: H04R1/08 ,  H01L2224/48137 ,  H01L2924/16152 ,  H04R1/04 ,  H04R1/1083 ,  H04R3/002 ,  H04R3/005 ,  H04R2201/003 ,  H04R2410/01 ,  H04R2410/05 ,  H04R2499/11

Abstract: An audio device, in at least one embodiment, includes a device package and a plurality of microphones. The device package defines a component cavity and a plurality of vias including a first via and a second via. The vias comprise openings in the device package extending between the component cavity and an exterior. The microphones are located within the component cavity. The microphones are configured to generate electrical signals in accordance with acoustic pressure in the respective vias. A disclosed audio apparatus includes an apparatus housing and a speaker and one or more noise cancellation microphones within the frame. The speaker includes a speaker diaphragm configured to vibrate in accordance with an audio signal. The apparatus housing may define a speaker cavity configured to mechanically support the speaker diaphragm. In at least one embodiment, the audio apparatus includes a multi-microphone device including a first transducer corresponding to a first via and a second transducer corresponding to a second via. A first acoustical conduit may extend from a first end in proximity to the first via to a first exterior location and a second acoustical conduit may extend from a second end in proximity to the second via to a second exterior location.

Abstract translation: 在至少一个实施例中，音频设备包括设备包和多个麦克风。 器件封装限定了一个元件腔和多个通孔，其中包括第一通孔和第二通孔。 通孔包括在部件空腔和外部之间延伸的器件封装中的开口。 麦克风位于组件腔内。 麦克风被配置为根据相应通孔中的声压产生电信号。 所公开的音频设备包括设备外壳和扬声器以及框架内的一个或多个噪声消除麦克风。 扬声器包括配置为根据音频信号振动的扬声器振动膜。 设备壳体可以限定被配置为机械地支撑扬声器振膜的扬声器腔。 在至少一个实施例中，音频设备包括多麦克风设备，其包括对应于第一通孔的第一换能器和对应于第二通孔的第二换能器。 第一声​​导管可以从靠近第一通道的第一端延伸到第一外部位置，并且第二声导管可以从靠近第二通道的第二端延伸到第二外部位置。

公开(公告)号：US20150301077A1

公开(公告)日：2015-10-22

申请号：US14686834

申请日：2015-04-15

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Anindya Bhattacharya ,  Roderick D. Holley ,  Ruoxin Jiang ,  Stephen T. Hodapp ,  John C. Tucker

IPC: G01P15/125

CPC classification number: G01P15/125

Abstract: In accordance with embodiments of the present disclosure, an apparatus for measuring acceleration may include a spring-mounted mass, a positional encoder configured to measure a position of the spring-mounted mass and output one or more signals indicative of a sine and a cosine of the position, a driver to set and maintain an oscillation of the spring-mounted mass, and a decoder configured to process the one or more signals to calculate an acceleration of the spring-mounted mass.

Abstract translation: 根据本公开的实施例，用于测量加速度的装置可以包括弹簧安装的质量块，位置编码器被配置为测量弹簧安装质量块的位置，并输出一个或多个指示正弦和余弦的信号 所述位置，设置和保持所述弹簧安装的质量的振荡的驱动器，以及被配置为处理所述一个或多个信号以计算所述弹簧安装的质量块的加速度的解码器。

公开(公告)号：US09161401B1

公开(公告)日：2015-10-13

申请号：US14220472

申请日：2014-03-20

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Eric King ,  Rahul Singh

IPC: H05B33/08 ,  H05B41/28 ,  H05B41/282 ,  H05B39/04

CPC classification number: H05B33/0815 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0845 ,  H05B37/02 ,  H05B39/047 ,  H05B41/28 ,  H05B41/2827 ,  Y02B20/345 ,  Y02B20/346 ,  Y02B20/347

Abstract: An LED lighting device includes an auxiliary power supply that supplies power to a control circuit of the LED lighting device that receives an input from a terminal of a light-emitting diode (LED) string of the lighting device that has a substantially lower voltage than the line voltage to which the lighting device is connected. The terminal may be within the LED string, or may be an end of the string. A linear regulator may be operated from the voltage drop across a number of the LEDs in the string so that the energy wasted by the auxiliary power supply is minimized. In other designs, the auxiliary power supply may be intermittently connected in series with the LED string only when needed. The intermittent connection can be used to forward bias a portion of the LED string when the voltage supplied to the LED string is low, increasing overall brightness.

Abstract translation: LED照明装置包括辅助电源，其向LED照明装置的控制电路供电，所述控制电路接收来自所述照明装置的发光二极管（LED）串的端子的输入，所述发光二极管（LED） 照明装置所连接的线路电压。 终端可以在LED串内，或者可以是串的末端。 线性调节器可以从串中的多个LED上的电压降来操作，使得由辅助电源浪费的能量最小化。 在其他设计中，辅助电源可以仅在需要时与LED串串联连接。 当提供给LED串的电压低时，可以使用间歇连接来对LED串的一部分进行偏置，从而提高整体亮度。

公开(公告)号：US20150256091A1

公开(公告)日：2015-09-10

申请号：US14200400

申请日：2014-03-07

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson

IPC: H02M5/293 ,  H05B33/08 ,  H05B37/02 ,  H02M7/06 ,  H02M1/08

CPC classification number: H02M5/293 ,  H02M1/08 ,  H02M7/066 ,  H05B33/0815 ,  H05B33/0845 ,  H05B37/02 ,  H05B37/0209 ,  H05B39/044

Abstract: An apparatus may include a dimmer output voltage emulator for causing a power converter interface circuit to draw current from a capacitor in the power converter interface during a period of time when a dimmer coupled to the power converter interface circuit is non-conducting to generate an emulated dimmer output voltage. The emulated dimmer output voltage may emulate part of a cycle of a non-zero AC dimmer output voltage of the dimmer after a triac of the dimmer prematurely stops conducting that would occur if the triac continued conducting during the part of the cycle. The dimmer output voltage emulator may include a pull-down circuit to pull down current of the interface circuit and generally decrease the emulated dimmer output voltage during a first period of time and a hold circuit to maintain the emulated dimmer output voltage below a substantially non-zero threshold value during a second period of time.

Abstract translation: 一种装置可以包括调光器输出电压仿真器，用于在耦合到功率转换器接口电路的调光器不导通以产生仿真的时间段期间使得功率变换器接口电路从电力转换器接口中的电容器抽取电流 调光输出电压。 模拟调光器输出电压可以模拟调光器的非零AC调光输出电压的一部分周期，如果三端双向可控硅开关元件在该周期的一部分期间继续导通，则在调光器的三端双向可控硅开关过早停止导通之后。 调光输出电压仿真器可以包括下拉电路以下拉接口电路的电流，并且在第一时间段期间通常降低模拟调光器输出电压，并且保持电路将模拟调光器输出电压保持在基本上不变的范围内， 在第二时间段内的零阈值。

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：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。