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    Low power analog-to-digital converter for sensing geophone signals
    121.
    发明授权
    Low power analog-to-digital converter for sensing geophone signals 有权
    用于感应地震检波器信号的低功耗模数转换器

    公开(公告)号：US08970413B1

    公开(公告)日：2015-03-03

    申请号：US13799323

    申请日：2013-03-13

    Applicant: Cirrus Logic, Inc.

    Inventor： John L. Melanson ,  Rahul Singh ,  Prashanth Drakshapalli ,  Dale Brummel

    IPC: H03M3/00 ,  H03M1/00

    CPC classification number: H03M3/32

    Abstract: A low power analog-to-digital converter (ADC) may sense current output of a geophone instead of voltage. The output of the geophone may be terminated through a resistor into a virtual ground of an integrator, which may be located inside a current mode delta-sigma analog-to-digital converter. The integrator may have a current mode or a charge mode feedback. Thus, the geophone may experience constant or substantially constant impedance terminated into a virtual ground. This approach may eliminate an instrumentation amplifier from a geophone sensing circuit, while still allowing for accurate sensing of geophone signals. The instrumentation amplifier is a major current consumer from the signal path, so its elimination may significantly reduce power consumption. The instrumentation amplifier may be eliminated, at least in part because of the provision of the resistance into a virtual ground of an integrator of the delta-sigma ADC.

    Abstract translation: 低功耗模数转换器（ADC）可以感测地震检波器的电流输出而不是电压。 地震检波器的输出可以通过电阻器终止到积分器的虚拟地，该积分器可以位于电流模式的Δ-Σ模数转换器内。 积分器可以具有电流模式或充电模式反馈。 因此，地震检波器可能经历恒定或基本恒定的阻抗终止于虚拟地面。 这种方法可以从地震检波器感测电路中消除仪表放大器，同时仍能准确地感测地震检波器信号。 仪表放大器是信号路径的主要消费者，因此其消除可能显着降低功耗。 至少部分地由于向Δ-ΣADC的积分器的虚拟接地提供电阻，可以消除仪表放大器。

    Multi-Mode Dimmer Interfacing Including Attach State Control
    122.
    发明申请
    Multi-Mode Dimmer Interfacing Including Attach State Control 有权
    多模式调光器接口，包括附加状态控制

    公开(公告)号：US20150054418A1

    公开(公告)日：2015-02-26

    申请号：US14477297

    申请日：2014-09-04

    Applicant: Cirrus Logic, Inc.

    Inventor： Eric J. King ,  John L. Melanson

    IPC: H05B33/08 ,  H05B37/02

    CPC classification number: H05B33/0815 ,  H05B37/02 ,  H05B39/044 ,  Y10S315/04

    Abstract: A system and method includes a controller that is configured to coordinate (i) a low impedance path for a dimmer current, (ii) attaching a dimmer to a power converter system at the leading edge of a phase-cut, rectified input voltage, (iii), control of switch mode power conversion, and (iv) an inactive state to, for example, reduce the dimmer current while allowing a dimmer to function normally from cycle to cycle of an alternating current (AC) supply voltage. In at least one embodiment, the dimmer functions normally when the dimmer conducts at a correct phase angle indicated by a dimmer input setting and avoids prematurely resetting while conducting. In at least one embodiment, by coordinating functions (i), (ii), (iii), and (iv) the controller controls a power converter system that is compatible with a triac-based dimmer.

    Abstract translation: 一种系统和方法包括控制器，其被配置为协调（i）用于调光器电流的低阻抗路径，（ii）在相切割整流的输入电压的前沿将调光器附接到功率转换器系统（ iii），开关模式功率转换的控制，以及（iv）非活动状态，例如降低调光器电流，同时允许调光器从交流（AC）电源电压的周期到周期正常工作。 在至少一个实施例中，当调光器以由调光器输入设置指示的正确相位角传导时，调光器正常工作，并避免在导通时过早复位。 在至少一个实施例中，通过协调功能（i），（ii），（iii）和（iv），控制器控制与基于三端双向可控硅的调光器兼容的功率转换器系统。

    SINGLE PIN CONTROL OF BIPOLAR JUNCTION TRANSISTOR (BJT)-BASED POWER STAGE
    124.
    发明申请
    SINGLE PIN CONTROL OF BIPOLAR JUNCTION TRANSISTOR (BJT)-BASED POWER STAGE 有权
    双极型晶体管（BJT）单电源控制

    公开(公告)号：US20140339995A1

    公开(公告)日：2014-11-20

    申请号：US14280474

    申请日：2014-05-16

    Applicant: Cirrus Logic, Inc.

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

    IPC: H05B33/08 ,  H02M3/158

    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。

    STABILIZATION CIRCUIT FOR LOW-VOLTAGE LIGHTING
    125.
    发明申请
    STABILIZATION CIRCUIT FOR LOW-VOLTAGE LIGHTING 有权
    低电压照明稳定电路

    公开(公告)号：US20140333205A1

    公开(公告)日：2014-11-13

    申请号：US14276535

    申请日：2014-05-13

    Applicant: Cirrus Logic, Inc.

    Inventor： Michael A. Kost ,  Eric J. King ,  John L. Melanson ,  Kan Wang ,  Ramin Zanbaghi

    IPC: H02M5/458 ,  H05B33/08

    CPC classification number: H02M5/458 ,  H05B33/0815 ,  H05B33/0887

    Abstract: An electronic transformer stabilization circuit includes a detection circuit and a reactive load. The detection circuit may be configured to receive a transformer output or a transformer signal derived from the transformer output. The detection circuit may determine whether the transformer that generated the transformer output is an electronic transformer. The determination may be made based on the presence of absence of high frequency components in the transformer output. Responsive to determining that an electronic transformer generated the transformer output, the stabilization circuit may operate a switch to connect the reactive load across an output of the transformer. The reactive load may include an inductor and may be configured to draw a stabilization current from the transformer. The stabilization current may ensure that the total current drawn from the transformer exceeds an oscillation current required to maintain reliable operation of the electronic transformer.

    Abstract translation: 电子变压器稳定电路包括检测电路和无功负载。 检测电路可以被配置为接收从变压器输出导出的变压器输出或变压器信号。 检测电路可以确定产生变压器输出的变压器是电子变压器。 可以基于变压器输出中是否存在高频分量进行确定。 响应于确定电子变压器产生变压器输出，稳定电路可以操作开关以连接变压器输出端上的无功负载。 无功负载可以包括电感器，并且可以被配置成从变压器抽出稳定电流。 稳定电流可以确保从变压器抽出的总电流超过维持电子变压器可靠运行所需的振荡电流。

    SYSTEMS AND METHODS FOR LOCATING AN ERROR MICROPHONE TO MINIMIZE OR REDUCE OBSTRUCTION OF AN ACOUSTIC TRANSDUCER WAVE PATH
    126.
    发明申请
    SYSTEMS AND METHODS FOR LOCATING AN ERROR MICROPHONE TO MINIMIZE OR REDUCE OBSTRUCTION OF AN ACOUSTIC TRANSDUCER WAVE PATH 审中-公开
    用于定位错误麦克风以最小化或减少妨碍声波传播波道的系统和方法

    公开(公告)号：US20140294182A1

    公开(公告)日：2014-10-02

    申请号：US13931133

    申请日：2013-06-28

    Applicant: Cirrus Logic, Inc.

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

    IPC: H04R29/00

    CPC classification number: H04R29/001 ,  H04R1/1083 ,  H04R2410/05

    Abstract: An apparatus may include an acoustic transducer, a housing, a microphone, and an acoustical conduit. The acoustic transducer may include a diaphragm having a front and a back, the diaphragm configured to mechanically vibrate in response to an audio signal, thereby producing sound from the front of the diaphragm. The housing may be configured to mechanically support the acoustic transducer such that the front faces an exterior of the housing and the back faces an interior of the housing. The microphone may be disposed in the interior of the housing and may be configured to sense combined sound produced by the acoustic transducer and ambient sound proximate to the acoustic transducer. The acoustical conduit may be coupled to and extend from the microphone and pass adjacent the acoustic transducer such that the microphone senses sound proximate to the front of the diaphragm.

    Abstract translation: 一种装置可以包括声换能器，壳体，麦克风和声导管。 声换能器可以包括具有前和后的隔膜，所述隔膜被配置为响应于音频信号机械地振动，从而从隔膜的前面产生声音。 壳体可以被配置为机械地支撑声换能器，使得前面面向壳体的外部，并且背面面向壳体的内部。 麦克风可以设置在壳体的内部，并且可以被配置为感测由声换能器产生的组合声音和靠近声换能器的环境声音。 声导管可以耦合到麦克风并从麦克风延伸并且靠近声学换能器，使得麦克风感测靠近隔膜前部的声音。

    SYSTEMS AND METHODS FOR DETERMINING A TYPE OF TRANSFORMER TO WHICH A LOAD IS COUPLED
    127.
    发明申请
    SYSTEMS AND METHODS FOR DETERMINING A TYPE OF TRANSFORMER TO WHICH A LOAD IS COUPLED 有权
    用于确定负载耦合的变压器类型的系统和方法

    公开(公告)号：US20140009082A1

    公开(公告)日：2014-01-09

    申请号：US13799329

    申请日：2013-03-13

    Applicant: CIRRUS LOGIC, INC.

    Inventor： Eric Jerome King ,  John L. Melanson

    IPC: H05B37/02

    CPC classification number: H05B37/02 ,  H05B33/0803 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/383

    Abstract: An apparatus may include a controller to provide compatibility between a load and a secondary winding of a transformer driven at its primary winding by a dimmer, wherein the controller is configured to: determine from a transformer secondary signal whether the transformer comprises a magnetic transformer or an electronic transformer; and select a compatibility mode of operation from a plurality of modes of operation based on the determination of whether the transformer comprises a magnetic transformer or an electronic transformer. A method for providing compatibility between a load and a secondary winding of a transformer driven at its primary winding by a dimmer may include determining from a transformer secondary signal whether the transformer comprises a magnetic transformer or an electronic transformer and selecting a compatibility mode of operation from a plurality of modes of operation based on the determination of whether the transformer comprises a magnetic transformer or an electronic transformer.

    Abstract translation: 一种装置可以包括控制器，以通过调光器提供在其初级绕组上驱动的变压器的负载和次级绕组之间的兼容性，其中所述控制器被配置为：从变压器次级信号确定变压器是否包括磁变压器或 电子变压器; 并且基于对变压器是否包括磁变压器或电子变压器的确定，从多种操作模式中选择兼容性操作模式。 用于通过调光器提供在其初级绕组上驱动的变压器的负载和次级绕组之间的兼容性的方法可以包括从变压器次级信号确定变压器是否包括磁变压器或电子变压器，并且选择兼容性操作模式 基于确定变压器是否包括磁变压器或电子变压器的多种操作模式。

    Buck-boost converter for an audio amplifier with multiple operations modes
    129.
    发明授权
    Buck-boost converter for an audio amplifier with multiple operations modes 有权

    公开(公告)号：US10116215B2

    公开(公告)日：2018-10-30

    申请号：US14612889

    申请日：2015-02-03

    Applicant: Cirrus Logic, Inc.

    Inventor： Eric Swanson ,  John L. Melanson ,  John C. Tucker ,  Eric J. King

    IPC: H02M3/158 ,  H03F1/02 ,  H03F3/181 ,  H03F3/217

    Abstract: A switching power stage for producing an output voltage to a load may include a power converter and a controller. The power converter may include a power inductor and plurality of switches arranged to sequentially operate in a plurality of switch configurations. The controller may be configured to, based on a measured parameter associated with the switching power stage, select a selected operational mode of the power converter from a plurality of operational modes, and 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 an input source of the power converter to the load in accordance with the selected operational mode.

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