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：US09024561B2

公开(公告)日：2015-05-05

申请号：US13835385

申请日：2013-03-15

Applicant: Cirrus Logic, Inc.

Inventor： Jason William Lawrence ,  Marc John Kobayashi ,  John L. Melanson ,  Miroslav Olijaca

IPC: H02P1/04 ,  H02P6/18

CPC classification number: H02P6/183 ,  H02P6/185

Abstract: The system and method disclose for the controlling of motor switching. The system includes a controller unit having a control signal generator, a memory device, a processing unit, a signal acquisition device, and an analog-to-digital converter. A power stage has a plurality of switches and 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 a multi-state pulse 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 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: 该系统和方法公开用于控制电机切换。 该系统包括具有控制信号发生器，存储器件，处理单元，信号采集器件和模数转换器的控制器单元。 功率级具有多个开关，并且从控制信号发生器接收控制信号和来自电源的功率信号。 功率级用多态脉冲驱动三组定子绕组的两个绕组，并且使三个定子绕组中的一个定子不被驱动。 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，处理单元与功率级通信以改变三个定子绕组的两个绕组的驱动。

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：US20150084535A1

公开(公告)日：2015-03-26

申请号：US14560330

申请日：2014-12-04

Applicant: Cirrus Logic, Inc.

Inventor： Eric King ,  John L. Melanson

IPC: H05B33/08 ,  G01R23/02

CPC classification number: H05B33/0845 ,  G01R23/02 ,  H05B33/0815 ,  Y02B20/346

Abstract: A line-frequency determining circuit for coupling to the output of a thyristor-switched dimmer that determines a line-frequency of an AC power source that supplies an input to the thyristor-controlled dimmer permits accurate control of periodic probing of the dimmer output. The probing is performed to predict zero-cross times of the AC power source that, in turn, are used to determine a dimming control value of the thyristor-switched dimmer. A minimum conductance is applied across the output of the dimmer during the probing intervals that begin at the turn-on time of the dimmer and last until enough information has been gathered to correctly predict a next zero crossing of the AC line voltage that supplies the input of the dimmer. The probing can be performed at intervals of an odd number of half-cycles of the AC line frequency so that internal dimmer timer operation is not affected by DC offset.

Abstract translation: 用于耦合到晶闸管开关调光器的输出的线路频率确定电路，其确定向晶闸管控制的调光器提供输入的AC电源的线路频率允许精确地控制调光器输出的周期性探测。 执行探测以预测交流电源的零交叉时间，其又用于确定可控硅开关调光器的调光控制值。 在调光间隔期间，在调光器的开启时间内，最小电导被施加到调光器的输出端，并且持续到足够的信息被收集以正确地预测提供输入的AC线电压的下一个过零点 的调光器。 可以以交流线路频率的奇数个半周期的间隔执行探测，使得内部调光器定时器操作不受直流偏移的影响。

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。

公开(公告)号：US08970258B2

公开(公告)日：2015-03-03

申请号：US13830047

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen ,  Johann Gaboriau ,  Lingli Zhang ,  Christian Larsen

IPC: H03K3/00 ,  H02M1/08

CPC classification number: H02M1/08

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node.

Abstract translation: 根据本公开的实施例，系统和方法可以包括在其栅极端子处耦合到输入信号电压的开关，用于控制耦合在其非门的驱动器件的栅极端子的栅极电压的输入信号电压 轨道电压和输出节点之间的端子。 系统和方法还可以包括具有第一端子和第二端子的二极管，二极管耦合到开关的非栅极端子，使得当开关被使能时，第一端子电连接到开关的栅极端子 驱动器装置和第二端子电耦合到输出节点。

公开(公告)号：US08933648B1

公开(公告)日：2015-01-13

申请号：US14037001

申请日：2013-09-25

Applicant: Cirrus Logic, Inc.

Inventor： Richard Dean Putman ,  Yanhui Xie ,  Michael Kost ,  Jean Charles Pina

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  H05B33/0845 ,  Y02B20/383

Abstract: According to systems and methods of this disclosure, a controller may be configured to: operate in a first compatibility mode of operation, determine from an input signal of the lamp assembly during operation in the first compatibility mode whether the first compatibility mode of operation provides compatibility between the lamp assembly and a power infrastructure to which it is coupled, select the first compatibility mode of operation from a plurality of modes of operation as a compatibility mode responsive to determining that the first compatibility mode of operation provides compatibility between the lamp assembly and a power infrastructure to which it is coupled, and select a second compatibility mode of operation from the plurality of modes of operation as the compatibility mode responsive to determining that the first compatibility mode of operation does not provide compatibility between the lamp assembly and the power infrastructure to which it is coupled.

Abstract translation: 根据本公开的系统和方法，控制器可以被配置为：在第一兼容性操作模式下操作，在第一兼容性模式下的操作期间，从灯组件的输入信号确定第一兼容性操作模式是否提供兼容性 在灯组件和与其耦合的电力基础设施之间，从多种操作模式中选择第一兼容性模式作为兼容性模式，以响应于确定第一兼容性操作模式提供灯组件和灯组件之间的兼容性 并且从多个操作模式中选择第二兼容性操作模式作为兼容性模式，以响应于确定第一兼容性操作模式不提供灯组件和电力基础设施之间的兼容性 它是耦合的。

公开(公告)号：US20140339999A1

公开(公告)日：2014-11-20

申请号：US14280539

申请日：2014-05-16

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Ramin Zanbaghi ,  Jieyeon Choi ,  Firas Azrai ,  Rahul Singh ,  Siddharth Maru

IPC: H02M3/07 ,  H05B33/08

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M3/335 ,  H02M2001/0006 ,  H03K17/64 ,  H05B33/0815 ,  H05B33/0845

Abstract: A bipolar junction transistor (BJT) may be used to generate a supply voltage for operating a controller, such as a lighting controller for a LED-based light bulb. A base of the BJT may receive current generated from the supply voltage to control operation of the BJT. Although the base of the BJT would be at a lower voltage than the emitter, a base drive circuit may be coupled between the emitter and the base of the BJT to increase the voltage. As one example, the base drive circuit may be a charge pump. In another example, the BJT may function as its own charge pump. In yet another example, a positive and a negative base current of the BJT may be independently controlled to regulate an output supply voltage VDD from the BJT.

Abstract translation: 可以使用双极结型晶体管（BJT）来产生用于操作诸如用于基于LED的灯泡的照明控制器的控制器的电源电压。 BJT的基座可以接收从电源电压产生的电流，以控制BJT的工作。 虽然BJT的基极处于比发射极更低的电压，但是基极驱动电路可以耦合在发射极和BJT的基极之间以增加电压。 作为一个示例，基本驱动电路可以是电荷泵。 在另一个例子中，BJT可以用作其自身的电荷泵。 在另一个例子中，可以独立地控制BJT的正和负的基极电流以调节来自BJT的输出电源电压VDD。

公开(公告)号：US08872561B2

公开(公告)日：2014-10-28

申请号：US13829831

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen ,  Lingli Zhang ,  Johann Gaboriau

IPC: H03K5/12 ,  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。