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    Microphone Interface and Method of Operation
    1.
    发明申请
    Microphone Interface and Method of Operation 失效
    麦克风接口及操作方法

    公开(公告)号：US20110064246A1

    公开(公告)日：2011-03-17

    申请号：US12883454

    申请日：2010-09-16

    申请人： Peter V. Loeppert ,  Paul Fielding Smith ,  Wei-Wen Dai ,  Shawn Beus

    发明人： Peter V. Loeppert ,  Paul Fielding Smith ,  Wei-Wen Dai ,  Shawn Beus

    IPC分类号： H03G3/20

    CPC分类号： H03G3/3026 ,  H03G1/0088

    摘要： An interface is provided between a transducer and audio processing circuitry. The interface has a switching device coupled to the transducer. The interface also has a first signal path that is selectively coupled to transducer via the switching device and includes a first output, the first signal path being configured to selectively receive input signals from the transducer, and form a first output signal at the first output by amplifying the input signals to provide a first gain. The first output is coupled to the audio processing circuitry. A second signal path is provided that is selectively coupled to the transducer via the switching device and includes a second output. The second gain is selected to be substantially larger than the first gain. The switching device is configured to switch the input signal between the first signal path and the second signal path.

    摘要翻译： 在换能器和音频处理电路之间提供接口。 接口具有耦合到换能器的开关装置。 该接口还具有经由开关装置选择性地耦合到换能器的第一信号路径，并且包括第一输出，第一信号路径被配置为选择性地接收来自换能器的输入信号，并且在第一输出处形成第一输出信号 放大输入信号以提供第一增益。 第一输出耦合到音频处理电路。 提供了经由开关装置选择性地耦合到换能器并包括第二输出的第二信号路径。 第二增益被选择为大于第一增益。 开关装置被配置为在第一信号路径和第二信号路径之间切换输入信号。

    Microphone interface and method of operation
    4.
    发明授权
    Microphone interface and method of operation 失效
    麦克风接口及操作方法

    公开(公告)号：US08687823B2

    公开(公告)日：2014-04-01

    申请号：US12883454

    申请日：2010-09-16

    申请人： Peter V. Loeppert ,  Paul Fielding Smith ,  Wei-Wen Dai ,  Shawn Beus

    发明人： Peter V. Loeppert ,  Paul Fielding Smith ,  Wei-Wen Dai ,  Shawn Beus

    IPC分类号： H03G3/00 ,  H04R3/00

    CPC分类号： H03G3/3026 ,  H03G1/0088

    摘要： An interface is provided between a transducer and audio processing circuitry. The interface has a switching device coupled to the transducer. The interface also has a first signal path that is selectively coupled to transducer via the switching device and includes a first output, the first signal path being configured to selectively receive input signals from the transducer, and form a first output signal at the first output by amplifying the input signals to provide a first gain. The first output is coupled to the audio processing circuitry. A second signal path is provided that is selectively coupled to the transducer via the switching device and includes a second output. The second gain is selected to be substantially larger than the first gain. The switching device is configured to switch the input signal between the first signal path and the second signal path.

    摘要翻译： 在换能器和音频处理电路之间提供接口。 接口具有耦合到换能器的开关装置。 该接口还具有经由开关装置选择性地耦合到换能器的第一信号路径，并且包括第一输出，第一信号路径被配置为选择性地接收来自换能器的输入信号，并且在第一输出处形成第一输出信号 放大输入信号以提供第一增益。 第一输出耦合到音频处理电路。 提供了经由开关装置选择性地耦合到换能器并包括第二输出的第二信号路径。 第二增益被选择为大于第一增益。 开关装置被配置为在第一信号路径和第二信号路径之间切换输入信号。

    Method and apparatus for processing a digital signal for analog transmission
    5.
    发明授权
    Method and apparatus for processing a digital signal for analog transmission 有权
    用于处理模拟传输的数字信号的方法和装置

    公开(公告)号：US06215430B1

    公开(公告)日：2001-04-10

    申请号：US09298541

    申请日：1999-04-24

    申请人： Paul Fielding Smith ,  Kevin Michael Laird ,  Danny Thomas Pinckley

    发明人： Paul Fielding Smith ,  Kevin Michael Laird ,  Danny Thomas Pinckley

    IPC分类号： H03M166

    CPC分类号： H03D7/00

    摘要： In a digital preprocessing system for processing a digital signal for analog transmission, the digital signal is up-sampled to produce a digital up-sampled signal having signal components in a plurality of Nyquist bands including a first Nyquist band and a plurality of super-Nyquist bands at higher frequencies than the first Nyquist band, wherein the first Nyquist band includes a baseband signal component and a plurality of aliased signal components. Thereafter, one of the plurality of signal components in the first Nyquist band is selected from the digital up-sampled signal. Finally, the selected one of the plurality of signal components is output at a frequency that will cause a digital to analog converter to output an aliased signal component in a super-Nyquist band nearer an anticipated peak amplitude of a filtering characteristic of the digital to analog converter than an aliased signal component in the super-Nyquist band that would be output by the digital to analog converter processing the baseband signal component.

    摘要翻译： 在用于处理用于模拟传输的数字信号的数字预处理系统中，数字信号被上采样以产生具有包括第一奈奎斯特频带和多个超奈奎斯特频带的多个奈奎斯特频带中的信号分量的数字上采样信号 频带高于第一奈奎斯特频带，其中第一奈奎斯特频带包括基带信号分量和多个混叠信号分量。 此后，从数字上采样信号中选择第一奈奎斯特带中的多个信号分量之一。 最后，多个信号分量中所选择的一个信号分量以使得数模转换器在数字到​​模拟滤波器的滤波特性的预期峰值幅度更接近的超奈奎斯特频带中输出混叠信号分量的频率输出 转换器比由奈奎斯特带内的混叠信号分量由数模转换器输出，处理基带信号分量。