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    SPEAKER DISTORTION CORRECTION DEVICE
    1.
    发明公开
    SPEAKER DISTORTION CORRECTION DEVICE 审中-公开

    公开(公告)号：US20240333232A1

    公开(公告)日：2024-10-03

    申请号：US18606415

    申请日：2024-03-15

    申请人： ALPS ALPINE CO., LTD.

    发明人： Yuji SAITO

    IPC分类号： H03F1/32 ,  H04R3/00

    CPC分类号： H03F1/3264 ,  H04R3/007 ,  H03F2201/3236

    摘要： A speaker distortion correction device includes an amplifier configured to drive a speaker; and a distortion corrector. An input signal is input to the distortion corrector, and an output of the distortion corrector is input to the amplifier. The distortion corrector includes a nonlinear distortion controller configured to generate a corrected signal obtained by performing a nonlinear distortion correction process on the input signal so that nonlinear distortion of the speaker is suppressed when the corrected signal is input to the amplifier; a maximum value calculating section configured to calculate a maximum output value of the amplifier to be obtained when the corrected signal is input to the amplifier, based on at least the input signal; and a selector configured to select the corrected signal when the maximum output value does not exceed a predetermined threshold and select the input signal when the maximum output value exceeds the predetermined threshold.

    Method and apparatus for tailored distortion of a signal prior to amplification to reduce clipping
    7.
    发明授权
    Method and apparatus for tailored distortion of a signal prior to amplification to reduce clipping 失效
    用于在放大之前对信号进行定制失真以减少削波的方法和装置

    公开(公告)号：US06175270B1

    公开(公告)日：2001-01-16

    申请号：US09035213

    申请日：1998-03-05

    申请人： Giovanni Vannucci

    发明人： Giovanni Vannucci

    IPC分类号： H01L21465

    CPC分类号： H03F1/3241 ,  H03F2201/3236

    摘要： In order to minimize the adverse effects of RF signal nonlinearities during amplification, especially the deleterious effects of signal clipping which may cause uncontrolled out-of-band emissions known as “spectral regrowth”, the specification relates to a device and a method for intentionally distorting a radio frequency (RF) signal in a “tailored manner”, prior to the amplification of the RF signal. The device monitors the amplitude of a RF signal at the inlet of a “tailored” distorter. A modifying signal waveform is generated whenever the amplitude of the monitored RF signal is greater than a threshold value. The RF signal is delayed to account for signal processing time associated with the generation of the modifying signal waveform. The generated modifying signal waveform is then summed with the delayed RF signal, thereby forming an intentionally distorted version of the original RF signal. The distorted signal is conveyed to a RF signal amplifier for amplification. The modifying waveform is chosen so as to reduce the amplitude of the RF signal peak to a value that does not exceed the clipping threshold. Furthermore, the modifying waveform is chosen (“tailored”) to be less harmful than the effects of the clipping distortion it replaces. The modifying waveform may be completely in-band, out-of-band, or have components of each, depending upon the specific implementation and the desired power spectrum. The process is compatible with current predistortion techniques and may used in conjunction with, or in lieu, of signal predistortion.

    摘要翻译： 为了最小化放大期间RF信号非线性的不利影响，特别是可能导致被称为“频谱再生长”的不受控制的带外发射的信号削波的有害影响，该说明书涉及用于故意扭曲的装置和方法 在RF信号的放大之前以“定制的方式”发射射频（RF）信号。 该设备监视“定制”变送器入口处的RF信号的幅度。 每当所监视的RF信号的幅度大于阈值时，就产生修改信号波形。 RF信号被延迟以考虑与修改信号波形的产生相关联的信号处理时间。 所产生的修改信号波形然后与延迟的RF信号相加，从而形成原始RF信号的有意失真的版本。 失真的信号被传送到RF信号放大器进行放大。 选择修改波形以将RF信号峰值的幅度减小到不超过限幅阈值的值。 此外，修改波形被选择（“量化”）比它所替代的限幅失真的影响更小。 根据具体实现和期望的功率谱，修改波形可以是完全带内的，带外的，或具有各自的分量。 该过程与当前的预失真技术兼容，并且可以与信号预失真联合使用或代替信号预失真。