公开(公告)号：WO2016069366A2

公开(公告)日：2016-05-06

申请号：PCT/US2015/056846

申请日：2015-10-22

Applicant: CIRRUS LOGIC, INC.

Inventor： KING, Eric J. ,  AMADI, Christophe J. ,  MELANSON, John L.

IPC: H03F1/02

CPC classification number: H03F3/2175 ,  H03F1/0277 ,  H03F1/083 ,  H03F3/181 ,  H03F3/185 ,  H03F3/217 ,  H03F3/2171 ,  H03F3/2173 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/231

Abstract: A method for producing an output voltage to a load may include, in a power stage comprising power converter having a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal and a second output terminal, controlling the linear amplifier to transfer electrical energy from the input source of the power stage to the load in accordance with one or more least significant bits of a digital input signal, and controlling the power converter in accordance with bits of the digital input signal other than the one or more least significant bits to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.

Abstract translation: 用于产生到负载的输出电压的方法可以包括：在包括具有功率电感器的功率转换器的功率级中，布置成以多个开关配置顺序操作的多个开关，以及 输出用于产生包括第一输出端子和第二输出端子的输出电压，控制线性放大器根据数字输入信号的一个或多个最低有效位将电能从功率级的输入源传输到负载 以及根据除一个或多个最低有效位之外的数字输入信号的位来控制功率转换器，以顺序地应用来自多个开关配置的开关配置，以选择性地激活或去激活多个开关中的每一个以便传送 从功率级的输入源到负载的电能。

公开(公告)号：WO2015187527A1

公开(公告)日：2015-12-10

申请号：PCT/US2015/033471

申请日：2015-06-01

Applicant: CIRRUS LOGIC, INC.

Inventor： AXELSSON, Jens-Peter B. ,  MELANSON, John L.

IPC: H04R1/10 ,  H04R1/04 ,  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: NOISE CANCELLATION MICROPHONES WITH SHARED BACK VOLUME A multi-microphone device includes a device package and a plurality of microphones. The device package defines a component cavity and a plurality of vias. The vias comprise openings in the device package extending between the component cavity and an exterior. The microphones are located within the component cavity sharing a back volume in common. The microphones are configured to generate electrical signals in accordance with acoustic pressure in the respective vias. Further, an audio apparatus includes a housing, a speaker and at least two microphones within the housing sharing a back volume in common. A first acoustical conduit extends from a first end in proximity to the first microphone to a first exterior location and a second acoustical conduit extends from a second end in proximity to the second microphone to a second exterior location.

Abstract translation: 具有共享背音量的噪声消除麦克风多麦克风设备包括设备封装和多个麦克风。 器件封装定义了元件腔和多个通孔。 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。 麦克风位于共享共同背部体积的部件空腔内。 麦克风被配置为根据相应通孔中的声压产生电信号。 此外，音频设备包括壳体，扬声器和壳体内的至少两个麦克风共享共同的背部体积。 第一声​​导管从靠近第一麦克风的第一端延伸到第一外部位置，并且第二声导管从靠近第二麦克风的第二端延伸到第二外部位置。

公开(公告)号：WO2014152933A1

公开(公告)日：2014-09-25

申请号：PCT/US2014/028299

申请日：2014-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： MELANSON, John L. ,  DRAKSHAPALLI, Prashanth ,  MARU, Siddharth ,  SINGH, Rahul

IPC: H05B33/08

CPC classification number: H05B33/0809 ,  H05B33/0815 ,  H05B33/0848 ,  Y02B20/346 ,  Y02B20/383

Abstract: An electronic system and method include a controller to actively control transfer of excess energy to an auxiliary-winding of an auxiliary power dissipation circuit. The excess energy is a transfer of energy from a primary winding of a switching power converter to the auxiliary-winding of the auxiliary power dissipation circuit. In at least one embodiment, the electronic system is a lighting system that includes a triac-based dimmer. The excess energy is energy drawn through the primary-side winding of the switching power converter to provide operational compatibility between a dimmer through which a power supply provides energy to the switching power converter and a load to which the switching power converter provides energy.

Abstract translation: 一种电子系统和方法包括：控制器，主动地控制向辅助功率耗散电路的辅助绕组传递过剩的能量。 过剩能量是将能量从开关功率转换器的初级绕组传递到辅助功率耗散电路的辅助绕组。 在至少一个实施例中，电子系统是包括基于三端双向可控硅的调光器的照明系统。 过量的能量是通过开关功率转换器的初级侧绕组的能量，以提供调光器之间的操作兼容性，通过该调光器，电源向开关功率转换器提供能量和开关功率转换器提供能量的负载。

公开(公告)号：WO2013090777A2

公开(公告)日：2013-06-20

申请号：PCT/US2012/069843

申请日：2012-12-14

Applicant: CIRRUS LOGIC, INC. ,  MELANSON, John L. ,  DRAKSHAPALLI, Prashanth ,  MARU, Siddharth

Inventor： MELANSON, John L. ,  MARU, Siddharth

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/4258 ,  H02M1/44 ,  H02M3/33523 ,  H02M3/33561 ,  H02M3/33576 ,  H02M5/2576 ,  H02M7/217 ,  H02M2001/0006 ,  H02M2001/0048 ,  H05B33/0815 ,  H05B33/0845 ,  H05B37/02 ,  Y02B20/346 ,  Y02B20/347 ,  Y02B70/126 ,  Y02B70/1491

Abstract: An electronic system and method include a controller to actively control power transfer from a primary winding of a switching power converter to an auxiliary-winding of an auxiliary power supply. The switching power converter is controlled and configured such that during transfer of power to the auxiliary-winding, the switching power converter does not transfer charge to one or more secondary-windings of the switching power converter. Thus, the switching power converter isolates one or more secondary transformer winding currents from an auxiliary-winding current. By isolating the charge delivered to the one or more secondary-windings from charge delivered to the auxiliary-winding, the controller can accurately determine an amount of charge delivered to the secondary-windings and, thus, to a load.

Abstract translation: 电子系统和方法包括控制器，用于主动地控制从开关功率转换器的初级绕组到辅助电源的辅助绕组的功率传递。 开关电源转换器被控制和配置为使得在向辅助绕组传递电力时，开关功率转换器不将电荷传递到开关功率转换器的一个或多个次级绕组。 因此，开关功率转换器将一个或多个次级变压器绕组电流与辅助绕组电流隔离。 通过将输送到一个或多个次级绕组的电荷从传送到辅助绕组的电荷隔离，控制器可以精确地确定输送到次级绕组的电荷量，从而准确地确定负载。

公开(公告)号：WO2012061784A2

公开(公告)日：2012-05-10

申请号：PCT/US2011/059462

申请日：2011-11-04

Applicant: CIRRUS LOGIC, INC. ,  KING, Eric J. ,  MELANSON, John L.

Inventor： KING, Eric J. ,  MELANSON, John L.

IPC: H05B37/02

CPC classification number: H03K17/13 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/346

Abstract: In at least one embodiment, the controller senses a leading edge, phase cut AC input voltage value to a switching power converter during a cycle of the AC input voltage. The controller senses the voltage value at a time prior to a zero crossing of the AC input voltage and utilizes the voltage value to determine the approximate zero crossing. In at least one embodiment, by determining an approximate zero crossing of the AC input voltage, the controller is unaffected by any disturbances of the dimmer that could otherwise make detecting the zero crossing problematic. The particular way of determining an approximate zero crossing is a matter of design choice. In at least one embodiment, the controller approximates the AC input voltage using a function that estimates a waveform of the AC input voltage and determines the approximate zero crossing of the AC input voltage from the approximation of the AC input voltage.

Abstract translation: 在至少一个实施例中，控制器在AC输入电压的周期期间感测前沿，相切AC输入电压值给开关功率变换器。 控制器在交流输入电压过零点之前的时间检测电压值，并利用该电压值确定近似过零点。 在至少一个实施例中，通过确定AC输入电压的近似过零点，控制器不受调光器的任何干扰的影响，否则可能使得检测过零点成为问题。 确定近似过零点的具体方式是设计选择的问题。 在至少一个实施例中，控制器使用估计AC输入电压的波形的函数来近似AC输入电压，并根据AC输入电压的近似来确定AC输入电压的近似过零点。

公开(公告)号：WO2008118279A1

公开(公告)日：2008-10-02

申请号：PCT/US2008/002952

申请日：2008-03-06

Applicant: CIRRUS LOGIC, INC.

Inventor： MELANSON, John L.

IPC: H03M3/04 ,  H03M7/00 ,  H04R25/00

CPC classification number: G10K11/178 ,  G10K2210/1081 ,  G10L21/0208 ,  H03M3/424 ,  H03M3/452 ,  H03M7/3024 ,  H03M7/3033 ,  H03M7/304 ,  H04R25/453

Abstract: A low-delay signal processing system and method are provided which includes a delta-sigma analog-to- digital converter, an oversampling processor, and a delta-sigma digital-to-analog converter. The delta- sigma analog-to-digital converter receives an input or audio signal and generates a digital sample signal at a high oversampling rate. The oversampling processor is connected to the analog-to-digital converter for processing the digital sample signal at the high oversampling rate with low-delay. The delta-sigma digital-to-analog converter is connected to the oversampling processor for receiving the digital sample signal at the high oversampling rate with low-delay for generating an analog signal. The oversampling processor includes a low-delay filter and a programmable delay element. In this manner, the analog signal is produced with a low delay and high accuracy.

Abstract translation: 提供了一种低延迟信号处理系统和方法，其包括Δ-Σ模数转换器，过采样处理器和Δ-Σ数模转换器。 Δ-Σ模数转换器接收输入或音频信号并以高过采样率产生数字采样信号。 过采样处理器连接到模数转换器，以低延迟的高过采样速率处理数字采样信号。 Δ-Σ数模转换器连接到过采样处理器，用于以高过采样速率接收数字采样信号，具有低延迟以产生模拟信号。 过采样处理器包括低延迟滤波器和可编程延迟元件。 以这种方式，以低延迟和高精度产生模拟信号。

公开(公告)号：WO2016040177A1

公开(公告)日：2016-03-17

申请号：PCT/US2015/048633

申请日：2015-09-04

Applicant: CIRRUS LOGIC, INC.

Inventor： HE, Ku ,  DAS, Tejasvi ,  MELANSON, John L.

IPC: H03G3/30

CPC classification number: H04R3/00 ,  H03G3/00 ,  H03G3/20 ,  H03G3/3005 ,  H03G3/3089 ,  H04R3/04 ,  H04R2430/00

Abstract: A signal path may have an analog path portion and a digital signal path portion. The digital portion may have a selectable digitally-controlled gain and may be configured to convert a digital audio input signal into an analog input signal in conformity with the selectable digitally-controlled gain, the digital signal path portion comprising a modulator including a forward path and a feedback path. The forward path may include a loop filter for generating a filtered signal responsive to the digital audio input signal and a feedback signal, a quantizer responsive to the filtered signal for generating a quantized signal, and a first gain element configured to apply the selectable digitally-controlled gain to a signal within the forward path. The feedback path may be configured to generate the feedback signal responsive to the quantized signal, the feedback path including a second gain element having a gain inversely proportional to the selectable digitally-controlled gain.

Abstract translation: 信号路径可以具有模拟路径部分和数字信号路径部分。 数字部分可以具有可选择的数字控制的增益，并且可以被配置为将数字音频输入信号转换成符合可选数字控制的增益的模拟输入信号，数字信号路径部分包括调制器，包括前向路径和 反馈路径。 正向路径可以包括环路滤波器，用于响应于数字音频输入信号和反馈信号产生经滤波的信号，响应于经滤波的信号产生量化信号的量化器，以及第一增益元件，被配置为将可选择的数字 - 控制增益到正向路径内的信号。 反馈路径可以被配置为响应于量化信号产生反馈信号，反馈路径包括具有与可选数字控制增益成反比的增益的第二增益元件。

公开(公告)号：WO2016040171A2

公开(公告)日：2016-03-17

申请号：PCT/US2015/048609

申请日：2015-09-04

Applicant: CIRRUS LOGIC, INC.

Inventor： HE, Ku ,  DAS, Tejasvi ,  MELANSON, John L.

IPC: H04R3/00 ,  H03G3/20

CPC classification number: H04R3/00 ,  H03G3/00 ,  H03G3/20 ,  H03G3/3005 ,  H03G3/3089 ,  H04R3/04 ,  H04R2430/00

Abstract: In accordance with embodiments of the present disclosure, a control circuit may be configured to, responsive to an indication to switch between gain modes of a signal path having an analog path portion and a digital signal path portion, switch a selectable analog gain of the analog path portion between a first analog gain and a second analog gain, switch a selectable digital gain of the digital signal path portion between a first digital gain and a second digital gain, wherein the product of the first analog gain and the first digital gain is approximately equal to the product of the second analog gain and the second digital gain, and control an analog response of the signal path to reduce the occurrence of audio artifacts present in the output signal as a result of the switch between gain modes of the signal path.

Abstract translation: 根据本公开的实施例，控制电路可以被配置为响应于在具有模拟路径部分和数字信号路径部分的信号路径的增益模式之间切换的指示， 在第一模拟增益和第二模拟增益之​​间切换模拟路径部分的可选模拟增益，在第一数字增益和第二数字增益之间切换数字信号路径部分的可选数字增益，其中第一模拟 增益，并且第一数字增益近似等于第二模拟增益和第二数字增益的乘积，并且控制信号路径的模拟响应以减少作为开关的结果出现在输出信号中的音频伪像的发生 在信号路径的增益模式之间。

公开(公告)号：WO2015160655A1

公开(公告)日：2015-10-22

申请号：PCT/US2015/025329

申请日：2015-04-10

Applicant: CIRRUS LOGIC, INC.

Inventor： DAS, Tejasvi ,  MELANSON, John L. ,  TUCKER, John, C. ,  FEI, Xiaofan

IPC: H03M1/00 ,  H03M1/66 ,  H03M1/68 ,  H03M1/70

CPC classification number: H03M1/002 ,  H03M1/0845 ,  H03M1/66 ,  H03M1/662 ,  H03M1/68 ,  H03M1/70 ,  H03M1/785 ,  H03M3/32 ,  H03M3/392 ,  H03M3/414 ,  H03M3/416 ,  H03M3/50

Abstract: In accordance with embodiments of the present disclosure, a processing system may include a plurality of processing paths including a first processing path and a second processing path, a digital-to-analog stage output, and a controller. The first processing path may include a first digital-to-analog converter for converting the digital input signal into a first intermediate analog signal, the first digital-to-analog converter configured to operate in a high-power state and a low-power state. The second processing path may include a second digital-to-analog converter for converting a digital input signal into a second intermediate analog signal. The digital-to-analog stage output may be configured to generate an analog signal comprising a sum of the first intermediate analog signal and the second intermediate analog signal. The controller may be configured to operate the first digital-to-analog converter in the lower-power state when a magnitude of the digital input signal is below a threshold magnitude.

Abstract translation: 根据本公开的实施例，处理系统可以包括多个处理路径，包括第一处理路径和第二处理路径，数模转换阶段输出和控制器。 第一处理路径可以包括用于将数字输入信号转换成第一中间模拟信号的第一数模转换器，第一数模转换器被配置为在大功率状态和低功率状态 。 第二处理路径可以包括用于将数字输入信号转换成第二中间模拟信号的第二数模转换器。 数模转换级输出可以被配置为产生包括第一中间模拟信号和第二中间模拟信号之和的模拟信号。 控制器可以被配置为当数字输入信号的幅度低于阈值大小时，在较低功率状态下操作第一数模转换器。

公开(公告)号：WO2014164740A1

公开(公告)日：2014-10-09

申请号：PCT/US2014/023372

申请日：2014-03-11

Applicant: CIRRUS LOGIC, INC.

Inventor： DRAKSHAPALLI, Prashanth ,  SINGH, Rahul ,  MARU, Siddharth ,  MELANSON, John L.

IPC: H05B33/08

CPC classification number: H02M3/33507 ,  H05B33/0815 ,  Y02B20/347

Abstract: A power distribution system and method includes a controller that is configured to control a switching power converter. In at least one embodiment, the controller includes a compensation current control circuit to control a compensation current that reduces and, in at least one embodiment, approximately eliminates variations in current drawn by the controller during a particular operational time period. In at least one embodiment, the power distribution system is a lamp that includes the controller, a switching power converter, and one or more light sources, such as light emitting diodes.

Abstract translation: 配电系统和方法包括配置成控制开关功率转换器的控制器。 在至少一个实施例中，控制器包括补偿电流控制电路，用于控制减小的补偿电流，并且在至少一个实施例中，大致消除了在特定操作时间段期间控制器所绘制的电流的变化。 在至少一个实施例中，配电系统是包括控制器，开关功率转换器和一个或多个光源（诸如发光二极管）的灯。