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1. 发明申请

US20100117730A1 D/A converter circuit and digital input class-D amplifier 有权
标题翻译： D / A转换器电路和数字输入D类放大器
公开(公告)号：US20100117730A1
公开(公告)日：2010-05-13
申请号：US12583792
申请日：2009-08-26
申请人： Hirotaka Kawai , Nobuaki Tsuji , Morito Morishima , Yohei Otani
发明人： Hirotaka Kawai , Nobuaki Tsuji , Morito Morishima , Yohei Otani
IPC分类号： H03F3/217 , H03M1/66
CPC分类号： H03F3/2173 , H03M1/0639 , H03M1/0673 , H03M1/822 , H03M3/328 , H03M3/50 , H03M3/506 , H03M7/3026
摘要： The present invention provides a D/A converter circuit which enables D/A conversion with a high precision and can prevent occurrence of a limit cycle component in the case where an input signal is low, and can also prevent the effect of dither signal from occurring in an analog signal which is a D/A conversion result.A dither signal generation section 505 outputs a dither signal (DITHER) which is an alternating current signal and a reversal dither signal (DITHER_N) inverted from the dither signal. A DEM decoder 502 processes an input digital signal including a component of the dither signal (DITHER), and outputs a plurality of lines of time-series digital signals having a density of “1” or “0” conforming to the input digital signal to be processed. An analog addition section 503 converts a plurality of lines of time-series digital signals and the reversal dither signal (DITHER_N) into an analog signal respectively and adds them, and outputs an analog signal which is a D/A conversion result.
摘要翻译：本发明提供了一种D / A转换器电路，其能够以高精度实现D / A转换，并且可以防止在输入信号低的情况下出现极限循环分量，并且还可以防止抖动信号的影响在作为D / A转换结果的模拟信号中。抖动信号生成单元505输出作为交流信号的抖动信号（DITHER）和从抖动信号反转的反转抖动信号（DITHER_N）。 DEM解码器502处理包括抖动信号（DITHER）分量的输入数字信号，并输出符合输入数字信号的密度为“1”或“0”的多行时间序列数字信号到被处理。模拟加法部分503将多行时间序列数字信号和反相抖动信号（DITHER_N）分别转换为模拟信号并将其相加，并输出作为D / A转换结果的模拟信号。

2. 发明授权

US07920082B2 D/A converter circuit and digital input class-D amplifier 有权
标题翻译： D / A转换器电路和数字输入D类放大器
公开(公告)号：US07920082B2
公开(公告)日：2011-04-05
申请号：US12583792
申请日：2009-08-26
申请人： Hirotaka Kawai , Nobuaki Tsuji , Morito Morishima , Yohei Otani
发明人： Hirotaka Kawai , Nobuaki Tsuji , Morito Morishima , Yohei Otani
IPC分类号： H03M1/20
CPC分类号： H03F3/2173 , H03M1/0639 , H03M1/0673 , H03M1/822 , H03M3/328 , H03M3/50 , H03M3/506 , H03M7/3026
摘要： The present invention provides a D/A converter circuit which enables D/A conversion with a high precision and can prevent occurrence of a limit cycle component in the case where an input signal is low, and can also prevent the effect of dither signal from occurring in an analog signal which is a D/A conversion result.A dither signal generation section 505 outputs a dither signal (DITHER) which is an alternating current signal and a reversal dither signal (DITHER_N) inverted from the dither signal. A DEM decoder 502 processes an input digital signal including a component of the dither signal (DITHER), and outputs a plurality of lines of time-series digital signals having a density of “1” or “0” conforming to the input digital signal to be processed. An analog addition section 503 converts a plurality of lines of time-series digital signals and the reversal dither signal (DITHER_N) into an analog signal respectively and adds them, and outputs an analog signal which is a D/A conversion result.
摘要翻译：本发明提供了一种D / A转换器电路，其能够以高精度实现D / A转换，并且可以防止在输入信号低的情况下出现极限循环分量，并且还可以防止抖动信号的影响在作为D / A转换结果的模拟信号中。抖动信号生成单元505输出作为交流信号的抖动信号（DITHER）和从抖动信号反转的反转抖动信号（DITHER_N）。 DEM解码器502处理包括抖动信号（DITHER）分量的输入数字信号，并输出符合输入数字信号的密度为“1”或“0”的多行时间序列数字信号到被处理。模拟加法部分503将多行时间序列数字信号和反相抖动信号（DITHER_N）分别转换为模拟信号并将其相加，并输出作为D / A转换结果的模拟信号。

3. 发明授权

US07679435B2 Digital input class-D amplifier 有权
标题翻译：数字输入D类放大器
公开(公告)号：US07679435B2
公开(公告)日：2010-03-16
申请号：US12075941
申请日：2008-03-14
申请人： Nobuaki Tsuji , Hirotaka Kawai , Morito Morishima
发明人： Nobuaki Tsuji , Hirotaka Kawai , Morito Morishima
IPC分类号： H03F3/68
CPC分类号： H03F3/2175 , H03F2200/345 , H03F2200/351 , H03M1/0668 , H03M1/808
摘要： A digital input class-D amplifier includes a decoder which outputs a plurality of lines of time-series digital signals having a density of 1 or 0 conforming to an input digital signal, an error integrator which integrates a difference between a drive waveform to be applied to a load and a sum of the plurality of lines of time-series digital signals output from the decoder, and a modulation circuit which generates a pulse modulated with a pulse width or a pulse density based on a result of integration performed by the error integrator. The load is driven in accordance with the pulse generated by the modulation circuit.
摘要翻译：数字输入D类放大器包括一个解码器，其输出符合输入数字信号的密度为1或0的多行时间序列数字信号，积分器将积分驱动波形到从解码器输出的多行时间序列数字信号的负载和总和，以及调制电路，其基于由误差积分器执行的积分结果生成以脉冲宽度或脉冲密度调制的脉冲。根据由调制电路产生的脉冲来驱动负载。

4. 发明申请

US20080224773A1 Digital input class-D amplifier 有权
标题翻译：数字输入D类放大器
公开(公告)号：US20080224773A1
公开(公告)日：2008-09-18
申请号：US12075941
申请日：2008-03-14
申请人： Nobuaki Tsuji , Hirotaka Kawai , Morito Morishima
发明人： Nobuaki Tsuji , Hirotaka Kawai , Morito Morishima
IPC分类号： H03F3/217
CPC分类号： H03F3/2175 , H03F2200/345 , H03F2200/351 , H03M1/0668 , H03M1/808
摘要： A digital input class-D amplifier includes a decoder which outputs a plurality of lines of time-series digital signals having a density of 1 or 0 conforming to an input digital signal, an error integrator which integrates a difference between a drive waveform to be applied to a load and a sum of the plurality of lines of time-series digital signals output from the decoder, and a modulation circuit which generates a pulse modulated with a pulse width or a pulse density based on a result of integration performed by the error integrator. The load is driven in accordance with the pulse generated by the modulation circuit.
摘要翻译：数字输入D类放大器包括一个解码器，其输出符合输入数字信号的密度为1或0的多行时间序列数字信号，积分器将积分驱动波形到从解码器输出的多行时间序列数字信号的负载和总和，以及调制电路，其基于由误差积分器执行的积分结果生成以脉冲宽度或脉冲密度调制的脉冲。根据由调制电路产生的脉冲来驱动负载。

5. 发明授权

US08044719B2 Class D amplifier circuit 失效
标题翻译： D类放大器电路
公开(公告)号：US08044719B2
公开(公告)日：2011-10-25
申请号：US12661089
申请日：2010-03-10
申请人： Takashi Norimatsu , Morito Morishima
发明人： Takashi Norimatsu , Morito Morishima
IPC分类号： H03F3/217
CPC分类号： H03F3/217
摘要： A class D amplifier circuit for generating a pulse signal whose pulse width is modulated in response to an input signal, the class D amplifier circuit includes first to fifth switching elements, a first capacitance element and a control section. The control section controls transition between a conduction state and a non-conduction state of each of the first to fifth switching elements to control a current direction flowing into a load having a first end electrically connected to the output end and a second end set to the reference potential, so that the current flows from the first end of the load to the second end of the load at a first timing and the current flows from the second end of the load to the first end of the load at a second timing.
摘要翻译： D类放大器电路，用于产生脉冲宽度根据输入信号调制的脉冲信号，D类放大器电路包括第一至第五开关元件，第一电容元件和控制部分。控制部分控制第一至第五开关元件中的每一个的导通状态和非导通状态之间的转换，以控制流入具有电连接到输出端的第一端的负载的电流方向，以及设置到参考电位，使得电流在第一定时从负载的第一端流向负载的第二端，并且电流在第二定时从负载的第二端流到负载的第一端。

6. 发明授权

US07859954B2 Optical disk apparatus with approximate focus control of laser beam 有权
标题翻译：具有激光束近似焦点控制的光盘装置
公开(公告)号：US07859954B2
公开(公告)日：2010-12-28
申请号：US12172527
申请日：2008-07-14
申请人： Morito Morishima
发明人： Morito Morishima
IPC分类号： G11B7/00
CPC分类号： G11B7/1263 , G11B7/0037 , G11B7/00455 , G11B7/00456 , G11B7/0909 , G11B7/094 , G11B7/0945 , G11B7/1378 , G11B7/24 , G11B7/24094
摘要： An optical disk apparatus is constructed for writing or reading information by irradiating a laser beam onto an optical disk while rotating the optical disk under a focus control of the laser beam relative to the rotated optical disk. In the optical disk apparatus, an irradiating section is operated to irradiate a laser beam onto the optical disk. A determining section determines a process pattern of the focus control by operating the irradiating section to irradiate the laser beam onto a predetermined area of the optical disk and by monitoring the laser beam reflected back from the predetermined area. A focusing section performs the focus control to regulate a spot diameter of the laser beam based on the determined process pattern during either of the writing or reading of information.
摘要翻译：光盘装置被构造用于通过在激光束相对于旋转的光盘的聚焦控制下旋转光盘的同时将激光束照射到光盘上来写入或读取信息。在光盘装置中，操作照射部分以将激光束照射到光盘上。确定部分通过操作照射部分来确定聚焦控制的处理模式，以将激光束照射到光盘的预定区域上，并且通过监视从预定区域反射回来的激光束。在信息的写入或读取期间，聚焦部分执行聚焦控制以基于所确定的处理模式来调节激光束的光斑直径。

7. 发明申请

US20100231298A1 Class D amplifier circuit 失效
标题翻译： D类放大器电路
公开(公告)号：US20100231298A1
公开(公告)日：2010-09-16
申请号：US12661089
申请日：2010-03-10
申请人： Takashi Norimatsu , Morito Morishima
发明人： Takashi Norimatsu , Morito Morishima
IPC分类号： H03F3/217
CPC分类号： H03F3/217
摘要： A class D amplifier circuit for generating a pulse signal whose pulse width is modulated in response to an input signal, the class D amplifier circuit includes first to fifth switching elements, a first capacitance element and a control section. The control section controls transition between a conduction state and a non-conduction state of each of the first to fifth switching elements to control a current direction flowing into a load having a first end electrically connected to the output end and a second end set to the reference potential, so that the current flows from the first end of the load to the second end of the load at a first timing and the current flows from the second end of the load to the first end of the load at a second timing.
摘要翻译： D类放大器电路，用于产生脉冲宽度根据输入信号调制的脉冲信号，D类放大器电路包括第一至第五开关元件，第一电容元件和控制部分。控制部分控制第一至第五开关元件中的每一个的导通状态和非导通状态之间的转换，以控制流入具有电连接到输出端的第一端的负载的电流方向，以及设置到参考电位，使得电流在第一定时从负载的第一端流向负载的第二端，并且电流在第二定时从负载的第二端流到负载的第一端。

8. 发明授权

US07564757B2 Optical disk recording apparatus 失效
标题翻译：光盘记录装置
公开(公告)号：US07564757B2
公开(公告)日：2009-07-21
申请号：US10831606
申请日：2004-04-23
申请人： Yukihisa Nakajyo , Morito Morishima
发明人： Yukihisa Nakajyo , Morito Morishima
IPC分类号： G11B7/00
CPC分类号： G11B7/24094 , G11B7/0045 , G11B23/40
摘要： The optical disk recording apparatus includes: a strategy circuit for converting recording data into a pulse train signal for defining an irradiation timing of laser light by using one of first and second conversion rules for forming different marks; a control unit for changing the conversion rule used for the strategy circuit after a timing of forming a contour of an image has passed at the time of forming the image on an optical disk, and when a timing of addition of a synchronization pattern to EFM data has arrived; and a current selecting unit for selecting a current in accordance with the pulse train signal based on the strategy circuit and for supplying it to a semiconductor laser.
摘要翻译：光盘记录装置包括：策略电路，用于通过使用用于形成不同标记的第一和第二转换规则之一将记录数据转换成用于定义激光照射定时的脉冲串信号; 在形成图像的轮廓的定时之后，在光盘上形成图像时，改变用于策略电路的转换规则的控制单元，当向EFM数据添加同步模式的定时时已经到达; 以及电流选择单元，用于根据所述策略电路根据所述脉冲串信号选择电流并将其提供给半导体激光器。

9. 发明申请

US20090160513A1 Signal generating apparatus and class-D amplifying apparatus 有权
标题翻译：信号发生装置和D类放大装置
公开(公告)号：US20090160513A1
公开(公告)日：2009-06-25
申请号：US12317207
申请日：2008-12-19
申请人： Morito Morishima
发明人： Morito Morishima
IPC分类号： H03K3/84 , H03K3/017
CPC分类号： H03F3/217
摘要： A time period control unit controls a time length “TU” of each of unit terms “U” in a variable manner. A pulse-width modulating unit is arranged by a holding unit, a counting unit, and a waveform generating unit. The holding unit holds thereinto a plurality of data “XD” every unit term “U”, which are sequentially supplied, as data “XE.” The counting unit changes a count value “X” during each of the unit terms “U.” The waveform generating unit generates such a pulse-width modulating signal “S” that pulses “P” have been arranged every unit term “U”, while time points when a large/small relationship between the count value “C” and a numeral value of the data “XE” held by the holding unit is inverted are defined as edge portions of the pulses.
摘要翻译：时间段控制单元以可变的方式控制单位项“U”的每个单位的时间长度“TU”。脉冲宽度调制单元由保持单元，计数单元和波形生成单元布置。保持单元将依次提供的每个单位“U”的多个数据“XD”保存为数据“XE”。计数单元在每个单位项“U.”期间改变计数值“X” 波形发生单元生成这样的脉冲宽度调制信号“S”，每个单位“U”都设置有脉冲“P”，而时间点在计数值“C”和数值之间的大/小关系由保持单元保持的数据“XE”被反转定义为脉冲的边缘部分。

10. 发明授权

US07538607B2 Class D amplifier 有权
标题翻译： D类放大器
公开(公告)号：US07538607B2
公开(公告)日：2009-05-26
申请号：US11376580
申请日：2006-03-15
申请人： Morito Morishima
发明人： Morito Morishima
IPC分类号： H03F3/38
CPC分类号： H03F3/217 , H03F2200/331 , H03F2200/351
摘要： The invention is directed to a class D amplifier. According to the class D amplifier, sound data applied to an input terminal is supplied through a compensation circuit to a PWM circuit, from which a PWM signal is output. The PWM signal is converted to an analog signal through a first low pass filter, which is delivered to a speaker. On the other hand, the sound data is delayed by a delay circuit, and is converted to an analog signal by a digital to analog converter. The higher frequency components of the data are removed by a second low pass filter, and the rest of the data is furnished to a differential amplifier. The differential amplifier amplifies a difference between an output of the first low pass filter and an output of the second low pass filter, which is then supplied to an analog to digital converter. The analog to digital converter converts an output from the differential amplifier to digital data, which is then supplied to the compensation circuit. By doing so, a compensation value based on an output from the analog to digital converter is added to the following PCM sound data that is applied to the input terminal.
摘要翻译：本发明涉及D类放大器。根据D类放大器，施加到输入端子的声音数据通过补偿电路提供给PWM电路，从其输出PWM信号。 PWM信号通过第一低通滤波器转换成模拟信号，该低通滤波器被传送到扬声器。另一方面，声音数据被延迟电路延迟，并通过数模转换器转换为模拟信号。数据的较高频率分量由第二低通滤波器去除，其余的数据被提供给差分放大器。差分放大器放大第一低通滤波器的输出和第二低通滤波器的输出之间的差，然后将其提供给模数转换器。模数转换器将差分放大器的输出转换为数字数据，然后将其提供给补偿电路。通过这样做，将基于模数转换器的输出的补偿值添加到应用于输入端的以下PCM声音数据。

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