中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

447 records (took 0.032 seconds)

    Differential output mode for a multi-mode power converter
    101.
    发明授权
    Differential output mode for a multi-mode power converter 有权
    多模功率转换器的差分输出模式

    公开(公告)号：US09595868B2

    公开(公告)日：2017-03-14

    申请号：US14612734

    申请日：2015-02-03

    Applicant: Cirrus Logic, Inc.

    Inventor： John L. Melanson ,  Eric J. King

    IPC: H02M3/158 ,  H03F1/02 ,  H03F3/185 ,  H03F3/217 ,  H04R1/00 ,  H03F3/181

    CPC classification number: H02M3/1582 ,  H02M3/1588 ,  H03F1/0227 ,  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.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 at least on an input signal to the switching power stage, determine the differential output voltage to be driven at the load, and based on the differential output voltage to be driven at the load, apply a switch configuration from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to generate the differential output voltage.A method may include sequentially applying a plurality of switch configurations in a power converter to selectively activate or deactivate each of the plurality of switches in order operate the power converter as a differential output buck converter, such that: during a charging phase of the power converter, the power inductor is coupled between (i) one of a first terminal of a power source and a second terminal of the power source and (ii) one of a first terminal of the output load and a second terminal of the output load; during a transfer phase of the power converter, at least one of the plurality of switches is activated in order to couple the power inductor between the first terminal of the output load and a second terminal of the output load; and the output voltage is a differential voltage between the first and second terminal of the output load.

    Abstract translation: 方法可以包括在功率转换器中顺序地施加多个开关配置以选择性地激活或去激活多个开关中的每一个，以便将功率转换器作为差分输出降压转换器操作，使得：在功率转换器的充电阶段期间 功率电感器耦合在（i）电源的第一端和电源的第二端之一以及（ii）输出负载的第一端和输出负载的第二端之一; 在功率转换器的传送阶段期间，激活多个开关中的至少一个以便在输出负载的第一端子和输出负载的第二端子之间耦合功率电感器; 并且输出电压是输出负载的第一和第二端子之间的差分电压。

    Multichip dynamic range enhancement (DRE) audio processing methods and apparatuses
    102.
    发明授权
    Multichip dynamic range enhancement (DRE) audio processing methods and apparatuses 有权
    多芯片动态范围增强（DRE）音频处理方法和装置

    公开(公告)号：US09584911B2

    公开(公告)日：2017-02-28

    申请号：US14975015

    申请日：2015-12-18

    Applicant: Cirrus Logic, Inc.

    Inventor： Tejasvi Das ,  John L. Melanson

    IPC: H03M1/00 ,  H04R3/04 ,  H03G7/00 ,  H03G9/00 ,  H03M1/12 ,  H04L1/20 ,  H04L27/26

    CPC classification number: H04R3/04 ,  G10L19/167 ,  G10L21/0324 ,  H03G7/007 ,  H03G9/005 ,  H03M1/00 ,  H03M1/12 ,  H03M1/1225 ,  H03M1/18 ,  H03M2201/4135 ,  H04L1/20 ,  H04L27/2647 ,  H04R2430/01 ,  H04R2430/03

    Abstract: In accordance with embodiments of the present disclosure, a multichip circuit for processing audio signals having dynamic range enhancement information over two or more integrated circuits may include a host integrated circuit and a client integrated circuit. The host integrated circuit may be configured to determine a dynamic range enhancement gain for a digital audio input signal, process the digital audio input signal in accordance with the dynamic range enhancement gain, and transmit audio data based on the processed digital audio input signal. The client integrated circuit may be coupled to the host integrated circuit and may be configured to receive the audio data and wherein the client integrated circuit is provided with the dynamic range enhancement gain and the client integrated circuit is configured to process the audio data with the dynamic range enhancement gain.

    Abstract translation: 根据本公开的实施例，用于处理在两个或多个集成电路上具有动态范围增强信息的音频信号的多芯片电路可以包括主机集成电路和客户端集成电路。 主机集成电路可以被配置为确定用于数字音频输入信号的动态范围增强增益，根据动态范围增强增益处理数字音频输入信号，并且基于处理的数字音频输入信号发送音频数据。 客户端集成电路可以耦合到主机集成电路，并且可以被配置为接收音频数据，并且其中向客户端集成电路提供动态范围增强增益，并且客户端集成电路被配置为使用动态范围处理音频数据 范围增强增益。

    Metric and tool to evaluate secondary path design in adaptive noise cancellation systems
    103.
    发明授权
    Metric and tool to evaluate secondary path design in adaptive noise cancellation systems 有权
    评估自适应噪声消除系统中二次路径设计的公制和工具

    公开(公告)号：US09578432B1

    公开(公告)日：2017-02-21

    申请号：US14259806

    申请日：2014-04-23

    Applicant: Cirrus Logic, Inc.

    Inventor： Ali Abdollahzadeh Milani ,  John L. Melanson

    IPC: H04R3/02 ,  H04R29/00 ,  H04R3/00

    CPC classification number: H04R29/001 ,  H04R3/002 ,  H04R3/005 ,  H04R2410/05 ,  H04R2499/11

    Abstract: The present invention provides a system and method encompassing a new metric and MATLAB tool box that phone makers may use to improve the design of the secondary path, in order to improve ANC performance. The metric measures how invertible the secondary path is and then evaluates ANC performance at a worst case scenario where P(z)=1 and W(z) becomes a complete predictor. The invention can be easily extended to a multi-channel ANC system.

    Abstract translation: 本发明提供了一种系统和方法，其包括电话机制造商可用于改进辅助路径设计的新度量和MATLAB工具箱，以便提高ANC性能。 度量测量二次路径的可逆性，然后在最坏情况下评估ANC性能，其中P（z）= 1和W（z）成为一个完整的预测变量。 本发明可以容易地扩展到多通道ANC系统。

    Boost converter voltage controlled based on audio signal
    105.
    发明授权
    Boost converter voltage controlled based on audio signal 有权
    基于音频信号控制升压转换器电压

    公开(公告)号：US09520782B2

    公开(公告)日：2016-12-13

    申请号：US14182798

    申请日：2014-02-18

    Applicant: Cirrus Logic, Inc.

    Inventor： Ullas Pazhayaveetil ,  Jeffrey May ,  Anu Chakravarty ,  Gautham Kamath ,  John Tucker ,  Christian Larsen

    IPC: H03G3/00 ,  H02M3/158 ,  G01R27/26 ,  G01R21/06 ,  G06F1/32

    CPC classification number: H02M3/158 ,  G01R21/06 ,  G01R27/2611 ,  G06F1/3203 ,  H02M3/156 ,  H03F3/187 ,  H03F3/2175 ,  H03G3/004

    Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.

    Abstract translation: 可以通过基于被放大的音频信号控制音频放大器来改善音频放大。 例如，当音频信号电平增加或减小时，升压转换器提供给音频放大器的升压电压也可以增加或减小。 在另一示例中，当音频信号电平降低到低于某一水平时，可以利用升压转换器输入将音频放大器切换成放大音频信号，以便以低电压输入放大音频信号。 可以在耦合到升压转换器和/或音频放大器的数字升压转换器控制器中实现音频放大器的控制。

    Two terminal drive of bipolar junction transistor (BJT) of a light emitting diode (LED)-based bulb
    106.
    发明授权
    Two terminal drive of bipolar junction transistor (BJT) of a light emitting diode (LED)-based bulb 有权
    基于发光二极管（LED）的灯泡的双极结型晶体管（BJT）的两端驱动器

    公开(公告)号：US09496855B2

    公开(公告)日：2016-11-15

    申请号：US14444087

    申请日：2014-07-28

    Applicant: Cirrus Logic, Inc.

    Inventor： Siddharth Maru ,  John L. Melanson ,  Rahul Singh ,  Eric King ,  Thirumalai Rengachari ,  Ramin Zanbaghi ,  Arnab Kumar Dutta

    IPC: H05B37/02 ,  H03K4/48 ,  H05B33/08

    CPC classification number: H03K4/48 ,  H05B33/0815 ,  H05B37/02 ,  Y02B20/347

    Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as for LED-based light bulbs. The BJT may be switched on and off from a controller coupled to two terminals of the BJT. Through the two terminals, the control IC may dynamically adjust a reverse recovery time period of the BJT. The reverse recovery time period may be adjusted by changing an amount of base charge that accumulates on the BJT. Additional, the reverse recovery may be controlled through the use of a reverse base current source applied to the BJT after beginning switching off the BJT.

    Abstract translation: 双极结型晶体管（BJT）可用于功率级DC-DC转换器，例如用于基于LED的灯泡。 BJT可以从耦合到BJT的两个端子的控制器接通和断开。 通过两个端子，控制IC可以动态地调整BJT的反向恢复时间段。 可以通过改变在BJT上积累的基本电荷的量来调整反向恢复时间段。 此外，可以通过在开始关闭BJT之后使用施加到BJT的反向基极电流源来控制反向恢复。

    Systems and methods for enhancing performance of audio transducer based on detection of transducer status
    109.
    发明授权
    Systems and methods for enhancing performance of audio transducer based on detection of transducer status 有权
    基于传感器状态的检测提高音频传感器的性能的系统和方法

    公开(公告)号：US09479860B2

    公开(公告)日：2016-10-25

    申请号：US14200458

    申请日：2014-03-07

    Applicant: Cirrus Logic, Inc.

    Inventor： Nitin Kwatra ,  John L. Melanson

    IPC: H04R29/00 ,  H04R1/10 ,  H04R5/04

    CPC classification number: H04R1/1083 ,  H04R5/04 ,  H04R2410/05 ,  H04R2460/01 ,  H04R2499/11

    Abstract: Based on transducer status input signals indicative of whether headphones housing respective transducers are engaged with ears of a listener, a processing circuit may determine whether the headphones are engaged with respective ears of the listener. Responsive to determining that at least one of the headphones is not engaged with its respective ear, the processing circuit may modify at least one of a first output signal to the first transducer and a second output signal to the second transducer such that at least one of the first output signal and the second output signal is different than such signal would be if the headphones were engaged with their respective ears.

    Abstract translation: 基于换能器状态输入信号，指示耳机是否包含各个换能器与收听者的耳朵接合，处理电路可以确定耳机是否与收听者的相应耳朵接合。 响应于确定耳机中的至少一个不与其相应的耳朵接合，处理电路可以将第一输出信号中的至少一个修改为第一换能器，并将第二输出信号修改为第二换能器，使得至少一个 第一输出信号和第二输出信号不同于这样的信号，如果耳机与它们各自的耳朵接合。

Patent Agency Ranking