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公开(公告)号：US08050424B2
公开(公告)日：2011-11-01
申请号：US11262433
申请日：2005-10-28
申请人： Masao Noro
发明人： Masao Noro
CPC分类号： H04R1/2819 , H04S1/002 , H04S2400/01 , H04S2400/07
摘要： Speaker system is constructed of a plurality of speakers each including a bass-reflex type cabinet. The speaker system is designed to differentiate a low-band resonance frequency between the speakers by differentiating inner cubic capacities of the speaker cabinets from each other. Audio signal of a different channel is input to each of the speakers, and only low-frequency signals of all of the channels are added together so that the added result is supplied to all of the speakers. Thus, using the differentiated low-band resonance frequencies, the speaker system permits reproduction of low-pitched sounds with a flat characteristic.
摘要翻译： 扬声器系统由多个扬声器构成，每个扬声器包括低音反射型机柜。 扬声器系统设计用于通过将扬声器柜的内部立体容量相互分开来区分扬声器之间的低频带谐振频率。 不同声道的音频信号被输入到每个扬声器，并且只有所有通道的低频信号被相加在一起，使得相加的结果被提供给所有扬声器。 因此，使用差分的低频带谐振频率，扬声器系统允许以平坦特性再现低音。
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公开(公告)号：US07362180B2
公开(公告)日：2008-04-22
申请号：US11204904
申请日：2005-08-16
申请人： Masao Noro , Hajime Asahira
发明人： Masao Noro , Hajime Asahira
CPC分类号： H03F3/2173 , H03F1/52 , H03F2200/03 , H03F2200/471
摘要： A protection circuit of a digital amplifier includes a DC voltage detection circuit for detecting a DC voltage occurring in a loudspeaker output terminal; a control circuit for performing protection operation when the DC voltage detection circuit outputs a detection signal; and a midpoint potential detection circuit for detecting midpoint potential shift between a positive power supply voltage and a negative power supply voltage. Output of the midpoint potential detection circuit is connected to input of the DC voltage detection circuit and when the midpoint potential shift is detected, the DC voltage detection circuit outputs a detection signal.
摘要翻译： 数字放大器的保护电路包括用于检测扬声器输出端子中出现的直流电压的直流电压检测电路; 用于在直流电压检测电路输出检测信号时进行保护动作的控制电路; 以及用于检测正电源电压和负电源电压之间的中点电位移动的中点电位检测电路。 中点电位检测电路的输出连接到直流电压检测电路的输入，当检测到中点电位移动时，直流电压检测电路输出检测信号。
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公开(公告)号：US20070291965A1
公开(公告)日：2007-12-20
申请号：US11812056
申请日：2007-06-14
申请人： Masao Noro , Akira Arai
发明人： Masao Noro , Akira Arai
IPC分类号： H04R25/00
CPC分类号： H04R1/2834
摘要： A loudspeaker system includes a loudspeaker enclosure having an inside space, a loudspeaker provided on the loudspeaker enclosure, a first diaphragm which has one of ends fixed to a surface of the loudspeaker enclosure and the other end, a second diaphragm which has one of ends fixed to the surface of the loudspeaker enclosure and the other end, a coupling portion having an elasticity, and coupling the other end of the first diaphragm to the other end of the second diaphragm, an opening structure provided in the surface of the loudspeaker enclosure, and a sealing member provided to a portion among the first and second diaphragms, the coupling portion and an edge part of the opening structure, and closing the inside space to hold an airtightness of the loudspeaker enclosure in a state that the first and second diaphragms can be vibrated.
摘要翻译： 扬声器系统包括具有内部空间的扬声器外壳，设置在扬声器外壳上的扬声器，第一隔膜，其一端固定在扬声器外壳的表面上，另一端固定有一端固定的第二隔膜 扬声器外壳的表面和另一端，具有弹性的联接部分，并且将第一隔膜的另一端连接到第二隔膜的另一端，设置在扬声器外壳的表面中的开口结构，以及 设置在所述第一和第二膜片之间的部分，所述联接部分和所述开口结构的边缘部分的密封构件，并且关闭所述内部空间以将所述扬声器外壳的气密保持在所述第一和第二隔膜可以是 振动
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公开(公告)号：US20070236974A1
公开(公告)日：2007-10-11
申请号：US11690197
申请日：2007-03-23
申请人： Masao Noro
发明人： Masao Noro
IPC分类号： H02J1/10
摘要： A switching regulator raises power from a USB terminal to 100 V, and performs the charging of an electrolytic capacitor. After the charging has been completed, a switching regulator drops the voltage to 5 V, and supplies the power to an amplifier. When the power consumed by the amplifier exceeds the maximum power to be supplied in accordance with the USB standard, the charge accumulated in the electrolytic capacitor is discharged, and for use, the switching regulator drops the power to 5 V. Thus, when the power consumed exceeds the maximum power to be supplied by the USB terminal, the amplifier can be driven without any problem.
摘要翻译： 开关稳压器将USB端子的电力提高到100V，并对电解电容器进行充电。 充电完成后，开关稳压器将电压降至5 V，并向放大器供电。 当放大器消耗的功率超过根据USB标准提供的最大功率时，累积在电解电容器中的电荷被放电，并且为了使用，开关调节器将功率降低到5V。因此，当功率 消耗的电力超过由USB端子提供的最大功率，则可以无限制地驱动放大器。
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公开(公告)号：US20070040611A1
公开(公告)日：2007-02-22
申请号：US11204904
申请日：2005-08-16
申请人： Masao Noro , Hajime Asahira
发明人： Masao Noro , Hajime Asahira
CPC分类号： H03F3/2173 , H03F1/52 , H03F2200/03 , H03F2200/471
摘要： A protection circuit of a digital amplifier includes a DC voltage detection circuit for detecting a DC voltage occurring in a loudspeaker output terminal; a control circuit for performing protection operation when the DC voltage detection circuit outputs a detection signal; and a midpoint potential detection circuit for detecting midpoint potential shift between a positive power supply voltage and a negative power supply voltage. Output of the midpoint potential detection circuit is connected to input of the DC voltage detection circuit and when the midpoint potential shift is detected, the DC voltage detection circuit outputs a detection signal.
摘要翻译： 数字放大器的保护电路包括用于检测扬声器输出端子中出现的直流电压的直流电压检测电路; 用于在直流电压检测电路输出检测信号时进行保护动作的控制电路; 以及用于检测正电源电压和负电源电压之间的中点电位移动的中点电位检测电路。 中点电位检测电路的输出连接到直流电压检测电路的输入，当检测到中点电位移动时，直流电压检测电路输出检测信号。
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公开(公告)号：US20050036636A1
公开(公告)日：2005-02-17
申请号：US10941264
申请日：2004-09-15
申请人： Masao Noro , Takahiro Tanaka , Nobukazu Toba , Kiyoshi Yamaki
发明人： Masao Noro , Takahiro Tanaka , Nobukazu Toba , Kiyoshi Yamaki
CPC分类号： B06B1/045 , B06B1/0207 , B06B1/0215 , B06B2201/52 , B06B2201/53 , B06B2201/55 , B06B2201/70 , G08B6/00
摘要： A vibration source driving device that realizes various vibration functions on portable telephones. The vibration source driving device includes a sound source for generating musical tone signals in response to music data. A vibration source to generate vibration, a driver to drive the vibration and a control circuit are further included such that the vibration source may be driven in synchronization with the rhythm signal within the music data.
摘要翻译： 振动源驱动装置，其实现便携式电话上的各种振动功能。 振动源驱动装置包括用于响应于音乐数据产生乐音信号的声源。 进一步包括产生振动的振动源，用于驱动振动的驱动器和控制电路，使得可以与音乐数据内的节奏信号同步地驱动振动源。
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公开(公告)号：US6111532A
公开(公告)日：2000-08-29
申请号：US169987
申请日：1998-10-13
申请人： Masamitsu Hirano , Masao Noro
发明人： Masamitsu Hirano , Masao Noro
摘要： There are provided a waveform shaper that shapes a waveform of a one-bit data signal obtained by subjecting an input data signal to sigma-delta modulation, to generate an output data signal, and a sigma-delta D/A converter incorporating the waveform shaper. A clock jitter-detecting device detects jitter of a clock signal used for generating the one-bit data signal and generates an error signal indicative of the detected jitter of the clock signal. An amplitude-adjusting device shapes the waveform of the one-bit data signal by using the clock signal, and adjusts amplitude of the shaped one-bit data signal in response to the error signal, to generate the output data signal.
摘要翻译： 提供了一种波形整形器，其对通过对输入数据信号进行Σ-Δ调制而获得的1位数据信号的波形进行整形，以产生输出数据信号，以及并入波形整形器的Σ-D / D转换器 。 时钟抖动检测装置检测用于产生一位数据信号的时钟信号的抖动，并产生指示检测到的时钟信号抖动的误差信号。 振幅调节装置通过使用时钟信号对一比特数据信号的波形进行调整，并根据误差信号调整成形的1比特数据信号的幅度，以产生输出数据信号。
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公开(公告)号：US6061279A
公开(公告)日：2000-05-09
申请号：US263938
申请日：1999-03-08
申请人： Akihiro Toda , Masao Noro , Toshio Maejima
发明人： Akihiro Toda , Masao Noro , Toshio Maejima
CPC分类号： G11C27/026 , G11C27/024
摘要： A delay circuit is provided, which is capable of eliminating the influence of noise of low frequency as disturbance. A plurality of memory cells including a plurality of capacitors store an analog signal as an input signal by storing charge of the input signal in the capacitors. A first inverting device inverts the input signal to generate an inverted signal. A control circuit generates and delivers control signals to the memory cells to select the input signal and the inverted signal alternately and sequentially write the selected signals into the memory cells in a predetermined writing sequence. The control circuit further generates and delivers to the memory cells to sequentially read out the input signal and the inverted signal from the memory cells in a sequence corresponding to the predetermined writing sequence. A second inverting device inverts the read-out inverted signal. An output signal is synthesized from the read-out input signal and an output signal of the second inverting device.
摘要翻译： 提供了一种能够消除低频噪声对干扰的影响的延迟电路。 包括多个电容器的多个存储单元通过将输入信号的电荷存储在电容器中来存储模拟信号作为输入信号。 第一反相装置反相输入信号以产生反相信号。 控制电路产生并传送控制信号到存储器单元，以选择输入信号和反相信号交替地并按预定的写入顺序将所选择的信号写入存储单元。 控制电路进一步产生并传送到存储器单元，以与预定写入序列相对应的顺序从存储器单元顺序读出输入信号和反相信号。 第二反相装置反转读出的反相信号。 从读出输入信号和第二反相器的输出信号合成输出信号。
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9.发明授权CMOS differential amplifier for a delta sigma modulator applicable for an analog-to-digital converter 失效适用于模数转换器的三角形Σ调制器的CMOS差分放大器
公开(公告)号：US6018262A
公开(公告)日：2000-01-25
申请号：US67046
申请日：1998-04-27
申请人： Masao Noro , Yusuke Yamamoto , Toshio Maejima
发明人： Masao Noro , Yusuke Yamamoto , Toshio Maejima
摘要： An analog-digital converter includes a .DELTA..SIGMA. modulator, a digital filter, a high-pass filter and a multiplier which are connected in series. Analog input is converted into serial-bit strings by the .DELTA..SIGMA. modulator, for which gain `1/A` is set. The digital filter extracts low-frequency components, corresponding to the analog input, from the serial-bit strings, so the low-frequency components are converted into parallel-bit digital data. The high-pass filter removes DC offset component from output of the digital filter; and then, output thereof is multiplied by scaling gain `A` by the multiplier so that digital output is produced. The .DELTA..SIGMA. modulator includes at least three switched-capacitor integrators and a one-bit quantizer, which are connected in series, as well as a one-sample delay circuit. One-bit output, produced by the one-bit quantizer, is delayed by the one-sample delay circuit, whose output is delivered to each switched-capacitor integrator. Each switched-capacitor integrator is configured using a CMOS differential amplifier which is configured by a CMOS operational amplifier and at least one amplitude-limiting circuit. The amplitude-limiting circuit is configured by two PMOS transistors and two NMOS transistors which are connected in parallel in a diode-connection manner; and this circuit is provided to limit amplitude in output of the CMOS differential amplifier by stabilizing its operating point.
摘要翻译： 模拟数字转换器包括串联连接的DELTA SIGMA调制器，数字滤波器，高通滤波器和乘法器。 模拟输入通过DELTA SIGMA调制器转换成串行位串，为其设置增益'1 / A'。 数字滤波器从串行比特串中提取与模拟输入相对应的低频分量，因此低频分量转换为并行位数字数据。 高通滤波器从数字滤波器的输出中去除直流偏移分量; 然后，通过乘法器将其输出乘以缩放增益“A”，从而产生数字输出。 DELTA SIGMA调制器包括串联连接的至少三个开关电容积分器和一位量化器以及单采样延迟电路。 由一位量化器产生的一位输出由单采样延迟电路延迟，其中输出被传送到每个开关电容积分器。 每个开关电容积分器使用由CMOS运算放大器和至少一个幅度限制电路配置的CMOS差分放大器来配置。 限幅电路由两个PMOS晶体管和两个以二极管连接方式并联连接的NMOS晶体管构成; 并且该电路被提供以通过稳定其工作点来限制CMOS差分放大器的输出的幅度。
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公开(公告)号：US5982204A
公开(公告)日：1999-11-09
申请号：US989572
申请日：1997-12-12
申请人： Akihiko Toda , Masao Noro
发明人： Akihiko Toda , Masao Noro
CPC分类号： H04L25/062 , H03K5/003 , H03K5/08
摘要： An information-discriminating circuit has a biasing device that superposes bias voltage on an input signal, and a comparator that discriminates information by comparing an output signal from the biasing device with a threshold value. The difference between the bias voltage and the threshold value is continuously adjusted such that a noise margin is varied according to the amplitude of the input signal.
摘要翻译： 信息识别电路具有将偏置电压叠加在输入信号上的偏置装置和通过将来自偏置装置的输出信号与阈值进行比较来鉴别信息的比较器。 连续地调整偏置电压和阈值之间的差异，使得噪声容限根据输入信号的幅度而变化。
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