公开(公告)号：US20150305107A1

公开(公告)日：2015-10-22

申请号：US14333065

申请日：2014-07-16

Applicant: Cirrus Logic, Inc.

Inventor： Mohit Sood ,  Vishwanathan Subramanian

IPC: H05B33/08 ,  H05B37/02 ,  H02M7/04

CPC classification number: H05B33/0845 ,  H02M7/04 ,  H05B37/02 ,  H05B39/048

Abstract: A controller may predict an estimated occurrence of a high-resistance state of a dimmer, wherein the high-resistance state occurs when the dimmer begins phase-cutting an alternating current voltage signal. The controller may also be configured to operate in a trailing-edge exposure mode for a period of time wherein the period of time includes a time of the estimated occurrence of the high-resistance state in order to allow the controller to detect the occurrence of the high-resistance state, wherein energy is transferred from an input to a dissipative element during the trailing-edge exposure mode. The controller may further be configured to minimize a time between a beginning of the period of time and the estimated occurrence of the high-resistance state by modifying the period of time based on an estimated charging time of a capacitor of the dimmer.

Abstract translation: 控制器可以预测调光器的高电阻状态的估计出现，其中当调光器开始切割交流电压信号时，发生高电阻状态。 控制器还可以被配置为在后沿曝光模式下操作一段时间，其中该时间段包括估计出现高电阻状态的时间，以便允许控制器检测到 高电阻状态，其中在后缘曝光模式期间能量从输入传递到耗散元件。 控制器还可以被配置为通过基于调光器的电容器的估计充电时间来修改时间段来最小化时间段的开始和估计的高电阻状态的发生之间的时间。

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：US09161126B2

公开(公告)日：2015-10-13

申请号：US13791509

申请日：2013-03-08

Applicant: Cirrus Logic, Inc.

Inventor： Jie Su ,  Samuel Oyetunji

IPC: H04R3/00

CPC classification number: H04R3/007

Abstract: In accordance with these and other embodiments of the present disclosure, systems and methods may include a controller configured to be coupled to an audio speaker, wherein the controller receives an audio input signal, and based on a displacement transfer function associated with the audio speaker, processes the audio input signal to generate an output audio signal communicated to the audio speaker, wherein the displacement transfer function correlates an amplitude and a frequency of the audio input signal to an expected displacement of the audio speaker in response to the amplitude and the frequency of the audio input signal.

Abstract translation: 根据本公开的这些和其他实施例，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，其中控制器接收音频输入信号，并且基于与音频扬声器相关联的位移传递函数， 处理音频输入信号以产生传送到音频扬声器的输出音频信号，其中，位移传递函数响应于音频扬声器的幅度和频率将音频输入信号的幅度和频率与音频扬声器的预期位移相关联 音频输入信号。

公开(公告)号：US09150010B1

公开(公告)日：2015-10-06

申请号：US14071346

申请日：2013-11-04

Applicant: CIRRUS LOGIC, INC.

Inventor： Anindya Bhattacharya ,  John Melanson

IPC: H03K5/12 ,  B41J2/045 ,  H03K4/06

CPC classification number: B41J2/04541 ,  B41J2/04548 ,  B41J2/0455 ,  B41J2/04581 ,  H03K4/063 ,  H03K5/12

Abstract: A system and method for charging heavy capacitive loads may comprise an n-stage stacked charging circuit wherein n is an integer greater than or equal to 2 and wherein the n-stage stacked charging circuit may comprise n−1 capacitors and a voltage supply, each sequentially electrically connected to the capacitive load in an order through a respective first through nth switch during a respective first through nth charging time period; the n−1th capacitors each sequentially electrically connected to the capacitive load in reverse order during a first through n−1th discharging time period through the respective n−1th through first switches. The system and method may comprise an n+1th switch electrically connecting the capacitive load to ground during an nth discharging period. The capacitive load may comprise a piezoelectric element, which may comprise an inkjet printer head inkjet actuator.

Abstract translation: 用于对重电容性负载进行充电的系统和方法可以包括n级堆叠充电电路，其中n是大于或等于2的整数，并且其中n级堆叠充电电路可以包括n-1个电容器和电压源 在相应的第一至第n充电时间段期间，通过相应的第一至第N开关按顺序电连接到电容性负载; 在第一到第n-1放电时间段期间，第n-1个电容器通过相应的第n-1个至第一开关以相反顺序电连接到电容性负载。 该系统和方法可以包括在第n个放电周期期间将电容性负载电连接到地的第n + 1开关。 电容性负载可以包括压电元件，其可以包括喷墨打印头喷墨致动器。

公开(公告)号：US09148164B1

公开(公告)日：2015-09-29

申请号：US14480343

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 ,  H03M3/00 ,  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：US09142205B2

公开(公告)日：2015-09-22

申请号：US13692367

申请日：2012-12-03

Applicant: Cirrus Logic, Inc.

Inventor： Jeffrey Alderson ,  Jon D. Hendrix

IPC: G10K11/00 ,  G10K11/178

CPC classification number: G10K11/002 ,  G10K11/17819 ,  G10K11/17833 ,  G10K2210/1081 ,  G10K2210/505 ,  G10K2210/506

Abstract: A personal audio device, such as a headphone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio, and the anti-noise signal is combined with source audio to provide an output for a speaker. The anti-noise signal causes cancellation of ambient audio sounds that appear at the reference microphone. A processing circuit uses the reference microphone to generate the anti-noise signal, which can be generated by an adaptive filter. The processing circuit also models an acoustic leakage path from the transducer to the reference microphone and removes elements of the source audio appearing at the reference microphone signal due to the acoustic output of the speaker. Another adaptive filter can be used to model the acoustic leakage path.

Abstract translation: 诸如耳机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参考麦克风信号产生抗噪声信号，并将抗噪声信号与源音频组合 为扬声器提供输出。 抗噪声信号会导致出现在参考麦克风处的环境音频声音的消除。 处理电路使用参考麦克风来产生可由自适应滤波器产生的抗噪声信号。 处理电路还对从换能器到参考麦克风的声音泄漏路径建模，并且由于扬声器的声输出而去除出现在参考麦克风信号处的源音频的元素。 另一种自适应滤波器可用于对声学泄漏路径建模。

公开(公告)号：US20150257231A1

公开(公告)日：2015-09-10

申请号：US14639925

申请日：2015-03-05

Applicant: Cirrus Logic, Inc.

Inventor： Erik J. Mentze ,  Karl Thompson

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M1/36 ,  H02M2001/0045 ,  H05B33/0812 ,  H05B33/0845 ,  H05B33/0851 ,  H05B33/0887 ,  H05B37/00

Abstract: Power consumption in a start-up circuit for a LED-based light bulb may be reduced by digitally switching a transistor of the start-up circuit coupled to the input voltage. When the transistor is digitally switched between on and off, a reduced amount of power is dissipated by the transistor, because it may not enter a saturation region of operation where the resistance of the transistor between drain and source terminals increases. The transistor may be coupled to a voltage regulator for generating one or more output voltages, including a supply voltage for a host controller IC. The transistor may be switched on and off by a digital signal generated by logic circuitry, which may decide to switch the transistor on and off based on a voltage level at an output of the voltage regulator.

Abstract translation: 通过数字地切换耦合到输入电压的启动电路的晶体管，可以减少基于LED的灯泡的启动电路中的功耗。 当晶体管在导通和截止之间进行数字切换时，晶体管消耗的功率减少，因为它可能不会进入饱和的工作区域，其中漏极和源极端子之间的晶体管的电阻增加。 晶体管可以耦合到电压调节器，用于产生一个或多个输出电压，包括用于主机控制器IC的电源电压。 晶体管可以由逻辑电路产生的数字信号导通和截止，逻辑电路可以基于电压调节器的输出端的电压电平决定开关晶体管。

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：US09107010B2

公开(公告)日：2015-08-11

申请号：US13762504

申请日：2013-02-08

Applicant: Cirrus Logic, Inc.

Inventor： Ali Abdollahzadeh Milani

IPC: H04R29/00 ,  H03G3/00 ,  G10L21/0224 ,  G10K11/178

CPC classification number: H04R29/00 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/3023 ,  G10L21/0216 ,  G10L21/0224 ,  G10L2021/02165 ,  H04R29/004

Abstract: An RMS detector uses the concept of the k-NN (classifying using nearest neighbors)—algorithm in order to obtain RMS values. A rms detector using first-order regressor with a variable smoothing factor is modified to penalize samples from center of data in order to obtain RMS values. Samples which vary greatly from the background noise levels, such as speech, scratch, wind and other noise spikes, are dampened in the RMS calculation. When background noise changes, the system will track the changes in background noise and include the changes in the calculation of the corrected RMS value. A minimum tracker runs more often (e.g. two or three times) than the rate as in prior art detectors and methods, tracks the minimum rms value, which is to compute a normalized distance value, which in turn is used to normalize the smoothing factor. From this data, a corrected or revised RMS value is determined as the function of the previous RMS value multiplied by one minus the smoothing factor plus the smooth factor times the minimum rms value to output the corrected RMS for the present invention. The rms value is used to generate a reset signal for the minimum tracker and is used to avoid deadlock in the tracker, for example, when the background signal increases/decreases over time.

Abstract translation: RMS检测器使用k-NN（使用最近邻）分类的算法 - 算法来获得RMS值。 使用具有可变平滑因子的一阶回归器的有效值检测器被修改以惩罚来自数据中心的样本，以获得RMS值。 在RMS计算中，与背景噪声水平差异很大的样本（如语音，划痕，风和其他噪声尖峰）都会受到影响。 当背景噪声改变时，系统将跟踪背景噪声的变化，并包括校正RMS值的计算中的变化。 最小跟踪器比现有技术的检测器和方法中的速率更频繁（例如两次或三次），跟踪最小均方根值，其是计算归一化距离值，其又被用于归一化平滑因子。 根据该数据，校正或修正的RMS值被确定为先前RMS值乘以1的函数减去平滑因子加上平滑因子乘以最小均方根值，以输出本发明的校正RMS。 均方根值用于产生最小跟踪器的复位信号，并用于避免跟踪器中的死锁，例如当背景信号随时间增加/减小时。