公开(公告)号：US5618206A

公开(公告)日：1997-04-08

申请号：US547559

申请日：1995-10-24

申请人： Yoshitsugu Sawada ,  Toshihiko Masuda

发明人： Yoshitsugu Sawada ,  Toshihiko Masuda

IPC分类号： H01R13/52 ,  H01R13/40

CPC分类号： H01R13/5208

摘要： A waterproof connector comprises: a connector housing (29, 89) formed with a plurality of terminal accommodation chambers (27, 93) for accommodating a plurality of terminal parts (53, 117), respectively and with a seal hood portion (39, 105); and a sealing member (25, 91) fitted to the seal hood portion of the housing and formed with a plurality of seal locating projections (47, 109) each having an insertion hole (45, 107) at a center thereof. A plurality of terminal parts (53, 117) connected to wires (51, 115), respectively are inserted into the terminal accommodation chambers of the housing, through the wire insertion holes of the sealing member fitted to the seal hood portion of the housing, respectively under watertight conditions. Owing to the presence of the seal locating projections (47, 109), the wire insertion holes of the sealing member are not dislocated away from the openings of the terminal accommodating chambers of the housing, when the terminal parts are inserted into the connector housing, thus improving the assembly productivity without increasing the number of parts.

摘要翻译： 防水连接器包括：形成有多个端子容纳室（27,93）的连接器壳体（29,89），用于分别容纳多个端子部分（53,117），并具有密封罩部分（39,105） ）; 以及密封构件（25,91），其配合到所述壳体的密封罩部分并且形成有多个密封定位突起（47,109），每个密封定位突起在其中心具有插入孔（45,107）。 连接到电线（51,115）的多个端子部分（53,117）分别通过装配到壳体的密封罩部分的密封构件的电线插入孔插入到壳体的端子容纳室中， 分别在防水条件下。 由于存在密封定位突起（47,109），当端子部分插入连接器壳体中时，密封构件的电线插入孔不会脱离壳体的端子容纳室的开口， 从而在不增加部件数量的情况下提高组装生产率。

公开(公告)号：US5343197A

公开(公告)日：1994-08-30

申请号：US70618

申请日：1993-06-02

申请人： Takashi Kanai ,  Toshihiko Masuda

发明人： Takashi Kanai ,  Toshihiko Masuda

IPC分类号： H03M1/86 ,  H03M3/02 ,  H03M1/82

CPC分类号： H03M3/368 ,  H03M3/502

摘要： A pair of equilibrium output signals P(+) and P(-) from a 1-bit D/A converter IC, which is made up of an oversampling filter, noise shaper and a pulse converter, are supplied to a pair of field effect transistors connected in a common drain configuration. A constant current I.sub.0 is supplied to the common drain from a constant current source and at least one of the source output currents is converted by an output circuit into a voltage. In this manner, a 1-bit D/A converted output signal freed of fluctuations of the power source is provided at an output terminal.

摘要翻译： 来自由过采样滤波器，噪声整形器和脉冲转换器组成的1位D / A转换器IC的一对平衡输出信号P（+）和P（ - ）被提供给一对场效应 连接在共同漏极配置中的晶体管。 恒定电流I0从恒定电流源提供给公共漏极，并且至少一个源极输出电流由输出电路转换成电压。 以这种方式，在输出端子处提供一个没有电源波动的1位D / A转换的输出信号。

公开(公告)号：US07492218B2

公开(公告)日：2009-02-17

申请号：US11645208

申请日：2006-12-22

申请人： Toshihiko Masuda ,  Yusuke Yamamoto ,  Arihiro Moroboshi

发明人： Toshihiko Masuda ,  Yusuke Yamamoto ,  Arihiro Moroboshi

IPC分类号： H03F3/38

CPC分类号： H03F3/2173

摘要： A digital amplifier apparatus includes a gain-adjusting section operable to adjust a gain of a digital audio signal; a dither-superposing section operable to superpose a predetermined dither on the digital audio signal; a pulse-width-modulated signal generating section operable to generate a pulse-width-modulated signal corresponding to the digital audio signal; an amplifying section operable to cause a switching element to perform a switching operation in accordance with the pulse-width-modulated signal; a pulse-width changing section operable to change a ratio between a “high” state and a “low” state of the pulse-width modulated signal; a synchronizing section operable to synchronize the pulse-width modulated signal with a reset signal that resets the digital audio signal; and a control section operable to perform a resetting operation by setting the gain of the digital audio signal to a zero level upon receiving the reset signal, stopping the superposing of the dither to thereby generate the pulse-width modulated signal, and setting the pulse-width modulated signal to the “low” state by using the pulse-width modulated signal synchronized with the reset signal, thereby causing the switching element to stop performing the switching operation.

摘要翻译： 数字放大器装置包括可调节数字音频信号增益的增益调整部分; 抖动叠加部分，可操作以在数字音频信号上叠加预定的抖动; 脉冲宽度调制信号产生部分，用于产生对应于数字音频信号的脉冲宽度调制信号; 放大部分，其可操作以使开关元件根据所述脉冲宽度调制信号执行切换操作; 脉冲宽度改变部分，用于改变所述脉冲宽度调制信号的“高”状态和“低”状态之间的比率; 同步部分，其可操作以使所述脉冲宽度调制信号与复位所述数字音频信号的复位信号同步; 以及控制部，其可操作以通过在接收到所述复位信号时将所述数字音频信号的增益设定为零电平来执行复位操作，停止叠加所述抖动，从而生成所述脉冲宽度调制信号， 通过使用与复位信号同步的脉冲宽度调制信号将宽度调制信号变为“低”状​​态，从而使开关元件停止执行开关操作。

公开(公告)号：US20070188220A1

公开(公告)日：2007-08-16

申请号：US11643627

申请日：2006-12-21

申请人： Toshihiko Masuda ,  Yusuke Yamamoto ,  Arihiro Moroboshi

发明人： Toshihiko Masuda ,  Yusuke Yamamoto ,  Arihiro Moroboshi

IPC分类号： H03F3/38

CPC分类号： H03F3/2173

摘要： A digital amplifier apparatus includes a gain-adjusting section operable to adjust a gain of a digital audio signal; a dither-superposing section operable to superpose a predetermined dither on the digital audio signal; a pulse-width-modulated signal generating section operable to generate a pulse-width-modulated signal corresponding to the digital audio signal; an amplifying section operable to cause a switching element to perform a switching operation in accordance with the pulse-width-modulated signal; a pulse-width changing section operable to change a ratio between a “high” state and a “low” state of the pulse-width modulated signal; and a control section operable to perform a muting process by causing the gain-adjusting section to set the gain of the digital audio signal to a zero level, the dither-superposing section to stop superposing the dither, and the pulse-width changing section to change, step by step, the ratio between the “high” state and the “low” state of the pulse-width modulated signal toward the “low” state upon receipt of a predetermined muting signal for muting the digital audio signal, thereby maintaining the “low” state and stopping the switching operation performed in accordance with the pulse-width modulated signal.

摘要翻译： 数字放大器装置包括可调节数字音频信号增益的增益调整部分; 抖动叠加部分，可操作以在数字音频信号上叠加预定的抖动; 脉冲宽度调制信号产生部分，用于产生对应于数字音频信号的脉冲宽度调制信号; 放大部分，其可操作以使开关元件根据所述脉冲宽度调制信号执行切换操作; 脉冲宽度改变部分，用于改变所述脉冲宽度调制信号的“高”状态和“低”状态之间的比率; 以及控制部，其可操作以通过使所述增益调整部将所述数字音频信号的增益设定为零电平来进行静音处理，所述抖动重叠部将所述抖动重叠，所述脉冲宽度变更部变为 在接收到用于使数字音频信号静音的预定静噪信号时，逐步地改变脉冲宽度调制信号的“高”状态与“低”状态之间的比例朝向“低”状态的比例，由此保持 “低”状态，并且停止根据脉宽调制信号执行的切换操作。

公开(公告)号：US20060022752A1

公开(公告)日：2006-02-02

申请号：US11185799

申请日：2005-07-21

申请人： Takuro Akiyama ,  Toshihiko Masuda

发明人： Takuro Akiyama ,  Toshihiko Masuda

IPC分类号： H03F3/217

CPC分类号： H03F1/304 ,  H03F3/217 ,  H03F3/2175 ,  H03F2200/331

摘要： A power amplifier apparatus includes a dither superimposing unit superimposing DC dither on a digital signal; a switching signal generating unit converting the digital signal on which the DC dither is superimposed by the dither superimposing unit to a pair of drive pulses on high and low sides having opposite levels; and a cancel signal generating unit generating a cancel signal to cancel a DC component caused by the DC dither by changing a ratio of pulse widths of the drive pulses on the high and low sides generated by the switching signal generating unit.

摘要翻译： 功率放大器装置包括将数字信号重叠DC抖动的抖动叠加单元; 切换信号生成单元，将由所述抖动叠加单元叠加了所述DC抖动的数字信号转换为具有相反电平的高低侧的一对驱动脉冲; 以及消除信号生成单元，其通过改变由切换信号生成单元生成的高低侧的驱动脉冲的脉冲宽度的比率，生成消除由DC抖动引起的DC分量的消除信号。

公开(公告)号：US06362765B1

公开(公告)日：2002-03-26

申请号：US09809400

申请日：2001-03-15

申请人： Toshihiko Masuda

发明人： Toshihiko Masuda

IPC分类号： H03M106

摘要： An object of this invention is to provide a D/A converter of a multibit type for improving its performance by reducing dispersion of the electric currents of plural electric current sources as much as possible. To achieve this object, the D/A converter has a constant electric current source (10) constructed by 2N (N=2, 3, - - - and here, N=16) constant electric current sources having constant electric current values equal to each other; selecting means (7, 8) for selecting Di constant electric current sources according to input data Di {here, Di=0, 1, 2, 3, - - - , (2N−1)} having N-bits in input word length so as to use these 2N constant electric current sources one by one until a sum of values of one input data or continuous plural input data among these 2N constant electric current sources exceeds 2N; and electric current adding means (9) for adding each of the constant electric currents from the Di constant electric current sources selected by the selecting means to each other.

公开(公告)号：US06281824B1

公开(公告)日：2001-08-28

申请号：US09416087

申请日：1999-10-12

申请人： Toshihiko Masuda

发明人： Toshihiko Masuda

IPC分类号： H03M166

CPC分类号： H03M1/0872 ,  H03K17/04113 ,  H03K17/6264 ,  H03M1/747

摘要： A D/A converter of a multibit type has improved performance by reducing dispersion of the electric currents of plural electric current sources as much as possible in which the D/A converter has a constant electric current source (10) constructed by 2N (N=2, 3, - - - and here, N=16) constant electric current sources having constant electric current values equal to each other; selectors (7, 8) for selecting Di constant electric current sources according to input data Di {here, Di=0, 1, 2, 3, - - - , (2N−1)} having N-bits in input word length so as to use these 2N constant electric current sources one by one until a sum of values of one input data or continuous plural input data among these 2N constant electric current sources exceeds 2N; and an electric current adder (9) for adding each of the constant electric currents from the Di constant electric current sources selected by the selectors to each other.

摘要翻译： AD / A转换器通过尽可能多地减少多个电流源的电流的散射来提高性能，其中D / A转换器具有由2N构成的恒定电流源（10）（N = 2 ，3， - - - ，这里为N = 16）恒定电流源，其恒定电流值彼此相等; 用于根据输入字长为N位的输入数据Di {这里，Di = 0,1,2,3，...，（2N-1）}选择Di恒定电流源的选择器（7,8） 一直使用这2N个恒定电流源，直到这2N个恒定电流源中的一个输入数据或连续的多个输入数据的值的和超过2N; 以及电流加法器（9），用于将由选择器选择的Di恒定电流源中的每个恒定电流彼此相加。

公开(公告)号：US5144306A

公开(公告)日：1992-09-01

申请号：US759930

申请日：1991-09-13

申请人： Toshihiko Masuda

发明人： Toshihiko Masuda

IPC分类号： H03H17/02 ,  H03M3/02 ,  H04B14/04

CPC分类号： H04B14/046

摘要： A noise shaping circuit includes a first degree noise shaping arrangement in which a quantization error component at a first quantizer adapted for quantizing input signals is fed back to an input side, and in which a quantization error component at the first quantizer is fed back by a predetermined feedback circuit to an input of the first quantizer. The feedback circuit includes a synthesizing unit supplied with an error signal from a first quantization error output unit, a second quantizer for quantizing an output signal from the synthesizing unit, a second quantization error output unit for taking out a quantization error at the second quantizer, a transfer characteristic unit having predetermined transfer characteristics, and a differentiation unit supplied with output signals from the second quantizer. Error signals from the second quantization error output unit are supplied to the transfer characteristic unit, the output of which is supplied to the synthesizing unit.

公开(公告)号：US3959441A

公开(公告)日：1976-05-25

申请号：US431158

申请日：1974-01-07

申请人： Isao Furuta ,  Kazuhito Yagaki ,  Toshihiko Masuda

发明人： Isao Furuta ,  Kazuhito Yagaki ,  Toshihiko Masuda

IPC分类号： B01D53/50 ,  C01B17/00

CPC分类号： B01D53/507

摘要： Sulphur dioxide is removed from a stack gas by bringing said gas containing SO.sub.2 into contact with an absorbing solution prepared by adding an hydroxide of a metal from either Groups II, III and VIII of the periodic Table to an aqueous solution of a halide of said metal, wherein the hydroxide is present in an amount of from 0.3 to 0.8 weight percent.

摘要翻译： 通过将含有SO 2的气体与通过将周期表第II，III和VIII族的金属的氢氧化物加入到所述金属的卤化物的水溶液中而制备的吸收溶液接触来从堆叠气体中除去二氧化硫 ，其中氢氧化物以0.3至0.8重量％的量存在。

公开(公告)号：US06304200B1

公开(公告)日：2001-10-16

申请号：US09382097

申请日：1999-08-24

申请人： Toshihiko Masuda

发明人： Toshihiko Masuda

IPC分类号： H03M166

CPC分类号： H03M3/398 ,  H03M1/822 ,  H03M3/506

摘要： A digital/analog conversion apparatus for converting an input digital signal into an analog signal. The digital/analog conversion apparatus is adapted for reproduction of a disk having layers in which signals sampled with different frequencies are recorded. The digital/analog conversion apparatus includes a circuit for converting digital signals read out from the layers of the disk into N-bit signals, and a PWM conversion circuit into which the N-bit signals are input. An analog circuit provided in a stage following the PWM conversion circuit is used commonly for the different signals reproduced from the disk.

摘要翻译： 一种用于将输入数字信号转换为模拟信号的数字/模拟转换装置。 数字/模拟转换装置适于再现具有以不同频率采样的信号被记录的层的盘。 数字/模拟转换装置包括用于将从盘的层读出的数字信号转换为N位信号的电路，以及输入N位信号的PWM转换电路。 在PWM转换电路之后的级中提供的模拟电路通常用于从盘再现的不同信号。