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：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：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：US20140301571A1

公开(公告)日：2014-10-09

申请号：US14247686

申请日：2014-04-08

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  John C. Tucker

IPC: H04R3/00

CPC classification number: H04R3/02 ,  H03F1/26 ,  H03F3/16 ,  H03F2200/372 ,  H03M3/00 ,  H03M3/39 ,  H03M3/424 ,  H03M3/458 ,  H03M3/50 ,  H03M7/3026 ,  H03M7/3028 ,  H04R3/00 ,  H04R3/002 ,  H04R3/007 ,  H04R19/04 ,  H04R29/001

Abstract: In accordance with embodiments of the present disclosure, a digital microphone system may include a microphone transducer and a digital processing system. The microphone transducer may be configured to generate an analog input signal indicative of audio sounds incident upon the microphone transducer. The digital processing system may be configured to convert the analog input signal into a first digital signal having three or more quantization levels, and in the digital domain, process the first digital signal to convert the first digital signal into a second digital signal having two quantization levels.

Abstract translation: 根据本公开的实施例，数字麦克风系统可以包括麦克风换能器和数字处理系统。 麦克风换能器可以被配置为产生指示入射到麦克风换能器上的音频声音的模拟输入信号。 数字处理系统可以被配置为将模拟输入信号转换成具有三个或更多个量化级别的第一数字信号，并且在数字域中处理第一数字信号以将第一数字信号转换成具有两个量化的第二数字信号 水平。

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：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：US20140055055A1

公开(公告)日：2014-02-27

申请号：US13836423

申请日：2013-03-15

Applicant: CIRRUS LOGIC, INC.

Inventor： John L. Melanson ,  Eric J. King

IPC: H02M3/335 ,  H05B33/08

CPC classification number: H02M3/335 ,  H05B33/0809 ,  H05B33/0815

Abstract: An electronic system includes a controller that actively controls a rate of charging and discharging of an energy storage capacitor to maintain compatibility with a dimmer. The controller actively controls charging of a capacitor circuit in a switching power converter to a first voltage level across the capacitor circuit. The controller further allows the capacitor to discharge to obtain a second voltage level across the capacitor circuit. The second voltage level is sufficient to draw a current through a phase-cut dimmer to prevent the dimmer from prematurely resetting. The first voltage is sufficient to allow the capacitor to discharge to the second voltage level during each cycle of the line voltage.

Abstract translation: 电子系统包括控制器，其主动地控制储能电容器的充电和放电速率以保持与调光器的兼容性。 控制器主动控制开关功率转换器中的电容器电路对电容器电路两端的第一电压电平的充电。 控制器还允许电容器放电以在电容器电路两端获得第二电压电平。 第二电压电平足以通过相位切割调光器画出电流，以防止调光器过早复位。 第一电压足以允许电容器在线路电压的每个周期期间放电到第二电压电平。

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：US10785568B2

公开(公告)日：2020-09-22

申请号：US14467969

申请日：2014-08-25

Applicant: Cirrus Logic, Inc.

Inventor： Tejasvi Das ,  Ku He ,  John L. Melanson

IPC: H04R3/02 ,  H03M1/70 ,  H03G3/30 ,  H03G3/00

Abstract: In accordance with embodiments of the present disclosure, an apparatus for providing an output signal to an audio transducer may include a control circuit. The control circuit may be configured to predict, based on a magnitude of a signal indicative of the output signal, an occurrence of an event for changing a selectable digital gain and a selectable analog gain and an audio signal path, and responsive to predicting the occurrence of the event, change, at an approximate time in which a zero crossing of the signal indicative of the output signal occurs, the selectable digital gain and the selectable analog gain.