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1. 发明申请

US20060222188A1 Sound apparatus with howling prevention function 失效
标题翻译：具有防啸声功能的声音设备
公开(公告)号：US20060222188A1
公开(公告)日：2006-10-05
申请号：US11393505
申请日：2006-03-29
申请人： Shinji Asakawa
发明人： Shinji Asakawa
IPC分类号： H04B15/00
CPC分类号： H04R3/02
摘要： An acoustic system that eliminates the howling that occurs when the sound outputted by the speaker feeds back to the input device. The acoustic system comprises a digital signal processor (DSP) that divides the input audio signal into different frequency bands, and reduces the audio levels for the frequency bands where howling is most likely to occur. In one embodiment, the acoustic system comprises a sound source section that generates a test tone that substantially covers the entire human audible range such that the DSP can set the filter levels according to the feedback of the test tone. In another embodiment, the sound source section stores one waveform at a given pitch and generates waveforms of other pitches based on the stored waveform. In yet another embodiment, the pitches of the generated waveforms are dispersed into four frequency bands to create a test tone that resembles a chord or a musical tone.
摘要翻译：声音系统消除了当扬声器输出的声音反馈到输入设备时发生的啸声。声学系统包括将输入音频信号划分成不同频带的数字信号处理器（DSP），并且降低最有可能发生啸声的频带的音频电平。在一个实施例中，声学系统包括声源部分，其产生基本上覆盖整个人类可听范围的测试音，使得DSP可以根据测试音的反馈设置滤波器电平。在另一个实施例中，声源部分以给定的间距存储一个波形，并且基于存储的波形产生其它音调的波形。在另一个实施例中，所生成的波形的间距被分散到四个频带中，以产生类似于或弦或音调的测试音。

2. 发明授权

US08278884B2 DC-DC converter 有权
标题翻译： DC-DC转换器
公开(公告)号：US08278884B2
公开(公告)日：2012-10-02
申请号：US12792581
申请日：2010-06-02
申请人： Yoshinobu Morimoto , Shinji Asakawa
发明人： Yoshinobu Morimoto , Shinji Asakawa
IPC分类号： G05F1/00
CPC分类号： H02M1/10 , Y10T307/625
摘要： A DC-DC converter including a power supply supplying direct current (DC) to an inductor, a switching device controlling the supply of DC from the power supply to the inductor by switching between a conductive state and a disconnected state according to a modulation signal, a signal output device generating the modulation signal for increasing or decreasing a period of the conductive state of the switching device, wherein the signal output device increases or decreases a duty ratio of the modulation signal to increase or decrease the period of the conductive state of the switching device, and a delay device controlling an increase of a duty ratio of the modulation signal, wherein the signal output device outputs the modulation signal with the controlled duty ratio to the switching device, thereby delaying the switching device from reaching a conductive state in which the duty ratio is a value of 1.
摘要翻译：一种DC-DC转换器，包括向电感器提供直流电的电源，开关装置，根据调制信号，通过在导通状态和断开状态之间切换来控制从电源向电感器的DC供电，生成用于增加或减少开关装置的导通状态的周期的调制信号的信号输出装置，其中，所述信号输出装置增加或减少所述调制信号的占空比以增加或减少所述开关装置的导通状态的周期切换装置，以及控制调制信号的占空比增加的延迟装置，其中信号输出装置将具有受控占空比的调制信号输出到开关装置，从而延迟开关装置达到导通状态，其中占空比为1。

3. 发明申请

US20110074379A1 DC-DC CONVERTER 有权
标题翻译： DC-DC转换器
公开(公告)号：US20110074379A1
公开(公告)日：2011-03-31
申请号：US12792581
申请日：2010-06-02
申请人： Yoshinobu Morimoto , Shinji Asakawa
发明人： Yoshinobu Morimoto , Shinji Asakawa
IPC分类号： G05F3/08 , H02J9/00
CPC分类号： H02M1/10 , Y10T307/625
摘要： A DC-DC converter including a power supply supplying direct current (DC) to an inductor, a switching device controlling the supply of DC from the power supply to the inductor by switching between a conductive state and a disconnected state according to a modulation signal, a signal output device generating the modulation signal for increasing or decreasing a period of the conductive state of the switching device, wherein the signal output device increases or decreases a duty ratio of the modulation signal to increase or decrease the period of the conductive state of the switching device, and a delay device controlling an increase of a duty ratio of the modulation signal, wherein the signal output device outputs the modulation signal with the controlled duty ratio to the switching device, thereby delaying the switching device from reaching a conductive state in which the duty ratio is a value of 1.
摘要翻译：一种DC-DC转换器，包括向电感器提供直流电的电源，开关装置，根据调制信号，通过在导通状态和断开状态之间切换来控制从电源向电感器的DC供电，生成用于增加或减少开关装置的导通状态的周期的调制信号的信号输出装置，其中，所述信号输出装置增加或减少所述调制信号的占空比以增加或减少所述开关装置的导通状态的周期切换装置，以及控制调制信号的占空比增加的延迟装置，其中信号输出装置将具有受控占空比的调制信号输出到开关装置，从而延迟开关装置达到导通状态，其中占空比为1。

4. 发明授权

US07840014B2 Sound apparatus with howling prevention function 失效
标题翻译：具有防啸声功能的声音设备
公开(公告)号：US07840014B2
公开(公告)日：2010-11-23
申请号：US11393505
申请日：2006-03-29
申请人： Shinji Asakawa
发明人： Shinji Asakawa
IPC分类号： H04B15/00 , H04R27/00 , H03G5/00 , G10L21/02 , H04K1/02
CPC分类号： H04R3/02
摘要： An acoustic system that eliminates the howling that occurs when the sound outputted by the speaker feeds back to the input device. The acoustic system comprises a digital signal processor (DSP) that divides the input audio signal into different frequency bands, and reduces the audio levels for the frequency bands where howling is most likely to occur. In one embodiment, the acoustic system comprises a sound source section that generates a test tone that substantially covers the entire human audible range such that the DSP can set the filter levels according to the feedback of the test tone. In another embodiment, the sound source section stores one waveform at a given pitch and generates waveforms of other pitches based on the stored waveform. In yet another embodiment, the pitches of the generated waveforms are dispersed into four frequency bands to create a test tone that resembles a chord or a musical tone.
摘要翻译：声音系统消除了当扬声器输出的声音反馈到输入设备时发生的啸声。声学系统包括将输入音频信号划分成不同频带的数字信号处理器（DSP），并且降低最有可能发生啸声的频带的音频电平。在一个实施例中，声学系统包括声源部分，其产生基本上覆盖整个人类可听范围的测试音，使得DSP可以根据测试音的反馈设置滤波器电平。在另一个实施例中，声源部分以给定的间距存储一个波形，并且基于存储的波形产生其它音调的波形。在另一个实施例中，所生成的波形的间距被分散到四个频带中，以产生类似于或弦或音调的测试音。

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