Apparatus and Method for a Smooth Powerup of a Reference Signal
    31.
    发明申请
    Apparatus and Method for a Smooth Powerup of a Reference Signal 有权
    参考信号平滑加电的装置和方法

    公开(公告)号:US20120044023A1

    公开(公告)日:2012-02-23

    申请号:US12860791

    申请日:2010-08-20

    IPC分类号: H03F3/04 G05F3/16

    摘要: A circuit for providing a reference voltage can be widely used in audio applications. However, at startup an abrupt start in the reference signal can cause undesirable audible artifacts. A circuit employing feedback of a reference voltage to control the charging of a capacitor which provides the reference voltage can be used to provide a smooth startup to the reference voltage. The circuit contains a differential pair for steering a fixed current source from one path to another as the reference voltage increases. The steered current can then be mirrored into one or more current mirrors where the newly mirrored current can be squeezed to zero when the difference between a desired reference voltage and the reference voltage approaches zero. This newly mirrored current can be used to charge a capacitor which is used to provide the reference voltage.

    摘要翻译: 用于提供参考电压的电路可以广泛地用于音频应用中。 然而,在启动时,参考信号中的突然启动可能导致不希望的可听见的伪影。 采用参考电压的反馈来控制提供参考电压的电容器的充电的电路可用于提供对参考电压的平滑启动。 该电路包含用于在参考电压增加时将固定电流源从一个路径转向另一个路径的差分对。 转向电流然后可以被镜像到一个或多个电流镜中,当期望的参考电压和参考电压之间的差接近零时,新镜像电流可以被压缩到零。 这个新镜像电流可以用于对用于提供参考电压的电容器进行充电。

    METHODS TO REDUCE CURRENT SPIKES IN CAPACITIVE DC-DC CONVERTERS EMPLOYING GAIN-HOPPING
    32.
    发明申请
    METHODS TO REDUCE CURRENT SPIKES IN CAPACITIVE DC-DC CONVERTERS EMPLOYING GAIN-HOPPING 有权
    减少采用增益控制的电容式DC-DC转换器中电流脉冲的方法

    公开(公告)号:US20130257176A1

    公开(公告)日:2013-10-03

    申请号:US13856393

    申请日:2013-04-03

    IPC分类号: H02M3/06

    CPC分类号: H02M3/06 H02M3/07

    摘要: A capacitive voltage converter providing multiple gain modes comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switch resistance value of the switched capacitor array, and to control a switching sequence of the switched capacitor array. An override control coupled to the skip gating control and the switched capacitor array, the override control configured to detect transitions in a gain mode and to modify the switch resistance value of the switched capacitor array and the switching sequence of the switched capacitor array for a finite amount of time following the gain mode transition.

    摘要翻译: 提供多个增益模式的电容性电压转换器,包括具有电压输入和电压输出的开关电容器阵列。 一个跳闸门控控制,其耦合到开关电容器阵列并且被配置为控制开关电容器阵列的开关电阻值,并且控制开关电容器阵列的开关顺序。 耦合到跳跃门控控制和开关电容器阵列的覆盖控制,覆盖控制被配置为检测增益模式中的转变并且修改开关电容器阵列的开关电阻值和用于有限的开关电容器阵列的开关顺序 增益模式转换后的时间量。

    System and method for capacitive DC-DC converter with variable input and output voltages
    33.
    发明授权
    System and method for capacitive DC-DC converter with variable input and output voltages 有权
    具有可变输入和输出电压的电容式DC-DC转换器的系统和方法

    公开(公告)号:US08797770B2

    公开(公告)日:2014-08-05

    申请号:US13312879

    申请日:2011-12-06

    IPC分类号: H02M3/18

    摘要: A capacitive voltage converter comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switching activity of the switched capacitor array. A resistance look-up table coupled to the switched capacitor array and configured to control a resistance value of the switched capacitor array.

    摘要翻译: 一种电容式电压转换器,包括具有电压输入和电压输出的开关电容器阵列。 耦合到开关电容器阵列并被配置为控制开关电容器阵列的开关活动的跳闸选通控制。 耦合到开关电容器阵列并被配置为控制开关电容器阵列的电阻值的电阻查找表。

    SYSTEM AND METHOD FOR CAPACITIVE DC-DC CONVERTER WITH VARIABLE INPUT AND OUTPUT VOLTAGES
    34.
    发明申请
    SYSTEM AND METHOD FOR CAPACITIVE DC-DC CONVERTER WITH VARIABLE INPUT AND OUTPUT VOLTAGES 有权
    具有可变输入和输出电压的电容式DC-DC转换器的系统和方法

    公开(公告)号:US20130141071A1

    公开(公告)日:2013-06-06

    申请号:US13312879

    申请日:2011-12-06

    IPC分类号: G05F1/10

    摘要: A capacitive voltage converter comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switching activity of the switched capacitor array. A resistance look-up table coupled to the switched capacitor array and configured to control a resistance value of the switched capacitor array.

    摘要翻译: 一种电容式电压转换器,包括具有电压输入和电压输出的开关电容器阵列。 耦合到开关电容器阵列并被配置为控制开关电容器阵列的开关活动的跳闸选通控制。 耦合到开关电容器阵列并被配置为控制开关电容器阵列的电阻值的电阻查找表。

    MULTIPLE MICROPHONE SUPPORT FOR EARBUD HEADSETS
    35.
    发明申请
    MULTIPLE MICROPHONE SUPPORT FOR EARBUD HEADSETS 审中-公开
    多功能麦克风支持耳机耳机

    公开(公告)号:US20130034237A1

    公开(公告)日:2013-02-07

    申请号:US13560290

    申请日:2012-07-27

    IPC分类号: G10K11/16 H04R1/10

    CPC分类号: H04R1/406 H04R1/10 H04R1/1083

    摘要: A system for improved audio in a headset comprising a first headset microphone generating a first signal. A second headset microphone generating a second signal. A multiplexer coupled to the first headset microphone and the second headset microphone for multiplexing the first signal and the second signal. A power extractor for extracting power for use by one or more of the multiplexer, the first headset microphone and the second headset microphone. A demultiplexer for extracting the first signal and the second signal. A signal processor for generating a noise reduced microphone signal. An audio subsystem for receiving the noise reduced microphone signal and for generating speaker signals for a first headphone speaker and a second headphone speaker.

    摘要翻译: 一种用于改善耳机中的音频的系统,包括产生第一信号的第一耳机麦克风。 产生第二信号的第二耳机麦克风。 耦合到第一耳机麦克风的多路复用器和用于复用第一信号和第二信号的第二耳机麦克风。 一种功率提取器,用于提取由多路复用器,第一耳机麦克风和第二耳机麦克风中的一个或多个使用的功率。 一种解复用器,用于提取第一信号和第二信号。 一种用于产生噪声降低的麦克风信号的信号处理器。 用于接收噪声降低的麦克风信号并用于产生第一耳机扬声器和第二耳机扬声器的扬声器信号的音频子系统。