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1. 发明授权

US07830182B2 Comparator 有权
标题翻译：比较器
公开(公告)号：US07830182B2
公开(公告)日：2010-11-09
申请号：US12284246
申请日：2008-09-19
申请人： Masaya Suzuki , Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
发明人： Masaya Suzuki , Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
IPC分类号： H03K5/22
CPC分类号： H03K5/2472
摘要： A comparator has P-channel field effect transistors that are supplied at respective gates with input voltages Vin and Vref, which are objects of comparison, and that act as a differential transistor pair; and N-channel field effect transistors that serve as current channels for respective drain currents of these two P-channel field effect transistors and that act as a current mirror circuit. The comparator outputs a drain voltage Vx of an N-channel field effect transistor as a signal showing a result of comparison between the two input voltages. An N-channel field effect transistor diode-connected to the comparator is interposed between drains of the N-channel field effect transistors.
摘要翻译：比较器具有P沟道场效应晶体管，其在各个栅极处以作为比较对象的输入电压Vin和Vref提供，并且用作差分晶体管对; 和N沟道场效应晶体管，用作这两个P沟道场效应晶体管的相应漏极电流的电流通道，并用作电流镜电路。比较器输出N沟道场效应晶体管的漏极电压Vx作为表示两个输入电压之间的比较结果的信号。二极管连接到比较器的N沟道场效应晶体管插在N沟道场效应晶体管的漏极之间。

2. 发明申请

US20090102516A1 Comparator 有权
标题翻译：比较器
公开(公告)号：US20090102516A1
公开(公告)日：2009-04-23
申请号：US12284246
申请日：2008-09-19
申请人： Masaya Suzuki , Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
发明人： Masaya Suzuki , Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
IPC分类号： H03K5/22
CPC分类号： H03K5/2472
摘要： A comparator has P-channel field effect transistors that are supplied at respective gates with input voltages Vin and Vref, which are objects of comparison, and that act as a differential transistor pair; and N-channel field effect transistors that serve as current channels for respective drain currents of these two P-channel field effect transistors and that act as a current mirror circuit. The comparator outputs a drain voltage Vx of an N-channel field effect transistor as a signal showing a result of comparison between the two input voltages. An N-channel field effect transistor diode-connected to the comparator is interposed between drains of the N-channel field effect transistors.
摘要翻译：比较器具有P沟道场效应晶体管，其在各个栅极处以作为比较对象的输入电压Vin和Vref提供，并且用作差分晶体管对; 和N沟道场效应晶体管，用作这两个P沟道场效应晶体管的相应漏极电流的电流通道，并用作电流镜电路。比较器输出N沟道场效应晶体管的漏极电压Vx作为表示两个输入电压之间的比较结果的信号。二极管连接到比较器的N沟道场效应晶体管插在N沟道场效应晶体管的漏极之间。

3. 发明授权

US08059834B2 Automatic gain control circuit 有权
标题翻译：自动增益控制电路
公开(公告)号：US08059834B2
公开(公告)日：2011-11-15
申请号：US11825544
申请日：2007-07-06
申请人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
发明人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
IPC分类号： H03G3/00
CPC分类号： H03G3/001 , H03G3/3026 , H03G7/06
摘要： A controller 100 updates data LVLm indicative of a level section of an input audio signal and controls a reference level Vr based on a signal CMP representative of a comparison result between the input audio signal and the reference level Vr, and further, controls gains of electronic volumes 10L and 10R in such a manner that these gains become such gains corresponding to the level section of the input audio signal. In this case, the level sections of the input audio signals are related to the gains in such a manner that levels of output signals of the electronic volumes do not exceed a previously set output amplitude upper limit level.
摘要翻译：控制器100更新表示输入音频信号的电平部分的数据LVLm，并且基于代表输入音频信号和参考电平Vr之间的比较结果的信号CMP来控制参考电平Vr，并且还控制电子体积10L和10R，使得这些增益成为对应于输入音频信号的电平部分的这样的增益。在这种情况下，输入音频信号的电平部分以增益的方式与电子卷的输出信号电平不超过预先设定的输出振幅上限电平相关。

4. 发明申请

US20080032640A1 Spectrum spreading circuit 有权
标题翻译：频谱扩展电路
公开(公告)号：US20080032640A1
公开(公告)日：2008-02-07
申请号：US11825433
申请日：2007-07-06
申请人： Hirotaka Kawai , Nobuaki Tsuji , Yasuomi Tanaka
发明人： Hirotaka Kawai , Nobuaki Tsuji , Yasuomi Tanaka
IPC分类号： H04B1/04
CPC分类号： H04B1/7136 , H04B2001/71365 , H04B2001/7154
摘要： A spectrum spreading circuit, includes a control portion that repeats a sequence in which the control portion generates a designation signal for designating all of plural frequencies in prescribed order by selecting a next frequency from the frequencies which have not been selected, and a signal generating portion that sequentially generates output signals having the designated frequencies respectively on the basis of the designation signal.
摘要翻译：频谱扩展电路包括控制部分，该控制部分通过从未被选择的频率中选择下一个频率来重复控制部分以规定的顺序产生指定多个频率的指定信号的序列，以及信号产生部分分别基于指定信号产生具有指定频率的输出信号。

5. 发明授权

US07990211B2 Class D amplifier circuit 有权
标题翻译： D类放大器电路
公开(公告)号：US07990211B2
公开(公告)日：2011-08-02
申请号：US12218084
申请日：2008-07-11
申请人： Hirotaka Kawai , Nobuaki Tsuji , Yasuomi Tanaka
发明人： Hirotaka Kawai , Nobuaki Tsuji , Yasuomi Tanaka
IPC分类号： H03F3/38
CPC分类号： H03F3/2173 , H03F2200/03 , H03F2200/351
摘要： A pulse monitor circuit detects the presence or non-presence of the output pulses output from an output stage circuit. The pulse monitor circuit outputs an up signal to the up/down counter when the output pulses do not exist at all and outputs a down signal to the up/down counter when the output pulses exist. The up/down counter outputs a signal for increasing the delay amount of a delay amount variable circuit when a count value is large, that is, when the output pulses disappear. In contrast, when the count value is small, that is, when the output pulses exist, the counter outputs the signal for reducing the delay amount of the delay amount variable circuit.
摘要翻译：脉冲监视电路检测从输出级电路输出的输出脉冲的存在或不存在。当输出脉冲完全不存在时，脉冲监视电路向上/向下计数器输出上升信号，当输出脉冲存在时，向下递减计数器输出下降信号。当计数值较大时，即当输出脉冲消失时，上/下计数器输出用于增加延迟量可变电路的延迟量的信号。相反，当计数值小时，即存在输出脉冲时，计数器输出用于减小延迟量可变电路的延迟量的信号。

6. 发明授权

US07912112B2 Spectrum spreading circuit 有权
标题翻译：频谱扩展电路
公开(公告)号：US07912112B2
公开(公告)日：2011-03-22
申请号：US11825433
申请日：2007-07-06
申请人： Hirotaka Kawai , Nobuaki Tsuji , Yasuomi Tanaka
发明人： Hirotaka Kawai , Nobuaki Tsuji , Yasuomi Tanaka
IPC分类号： H04B1/69
CPC分类号： H04B1/7136 , H04B2001/71365 , H04B2001/7154
摘要： A spectrum spreading circuit, includes a control portion that repeats a sequence in which the control portion generates a designation signal for designating all of plural frequencies in prescribed order by selecting a next frequency from the frequencies which have not been selected, and a signal generating portion that sequentially generates output signals having the designated frequencies respectively on the basis of the designation signal.
摘要翻译：频谱扩展电路包括：控制部分，其重复序列，其中控制部分通过从尚未被选择的频率中选择下一个频率，以规定的顺序产生指定多个频率的指定信号;以及信号产生部分分别基于指定信号产生具有指定频率的输出信号。

7. 发明申请

US20080018393A1 Offset voltage correction circuit and class D amplifier 有权
标题翻译：偏置电压校正电路和D类放大器
公开(公告)号：US20080018393A1
公开(公告)日：2008-01-24
申请号：US11825530
申请日：2007-07-06
申请人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
发明人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
IPC分类号： H03F1/02
CPC分类号： H03F3/217
摘要： An offset voltage correction circuit for a differential amplifier comprising NMOS transistors serving as a pair of differential transistors, and PMOS transistors serving as a pair of load transistors connected between outputs of the pair of differential transistors and a power source. The offset voltage correction circuit is equipped with a voltage generator for generating, between a source of any one of the pair of load transistors and the power source, a constant voltage for correcting an offset voltage of the differential amplifier.
摘要翻译：一种用于差分放大器的偏移电压校正电路，包括用作一对差分晶体管的NMOS晶体管，以及用作一对负载晶体管的PMOS晶体管，所述负载晶体管连接在所述一对差分晶体管的输出端和电源之间。偏移电压校正电路配备有电压发生器，用于在一对负载晶体管中的任一个的源极和电源之间产生用于校正差分放大器的偏移电压的恒定电压。

8. 发明申请

US20080008336A1 Automatic gain control circuit 有权
标题翻译：自动增益控制电路
公开(公告)号：US20080008336A1
公开(公告)日：2008-01-10
申请号：US11825544
申请日：2007-07-06
申请人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
发明人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
IPC分类号： H03G3/00
CPC分类号： H03G3/001 , H03G3/3026 , H03G7/06
摘要： A controller 100 updates data LVLm indicative of a level section of an input audio signal and controls a reference level Vr based on a signal CMP representative of a comparison result between the input audio signal and the reference level Vr, and further, controls gains of electronic volumes 10L and 10R in such a manner that these gains become such gains corresponding to the level section of the input audio signal. In this case, the level sections of the input audio signals are related to the gains in such a manner that levels of output signals of the electronic volumes do not exceed a previously set output amplitude upper limit level.
摘要翻译：控制器100更新表示输入音频信号的电平部分的数据LVLm，并且基于代表输入音频信号和参考电平Vr之间的比较结果的信号CMP来控制参考电平Vr，并且还控制电子体积10 L和10 R，使得这些增益成为对应于输入音频信号的电平部分的这样的增益。在这种情况下，输入音频信号的电平部分以增益的方式与电子卷的输出信号电平不超过预先设定的输出振幅上限电平相关。

9. 发明授权

US07924089B2 Offset voltage correction circuit and class D amplifier 有权
公开(公告)号：US07924089B2
公开(公告)日：2011-04-12
申请号：US12807162
申请日：2010-08-30
申请人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
发明人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
IPC分类号： H03F3/38
CPC分类号： H03F3/217
摘要： A class D amplifier includes an input unit that inputs an input signal and an integrator which includes a differential operational amplifier having an offset voltage correction function. The integrator integrates the input signal input. A pulse-width modulator modulates the integration result of the integrator to generate a pulse signal having a pulse width reflective of the integration result. An output unit outputs the pulse signal. A feedback unit superimposes a signal output from the output unit on the input signal and feeds back the superimposed signal to the integrator. An input controller selectively set the input unit to a state where no signal is input. An output controller sets a voltage of an output from the feedback unit to a constant voltage.

10. 发明申请

US20110006843A1 Offset voltage correction circuit and class D amplifier 有权
标题翻译：偏置电压校正电路和D类放大器
公开(公告)号：US20110006843A1
公开(公告)日：2011-01-13
申请号：US12807162
申请日：2010-08-30
申请人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
发明人： Yasuomi Tanaka , Nobuaki Tsuji , Hirotaka Kawai
IPC分类号： H03F3/217
CPC分类号： H03F3/217
摘要： A class D amplifier includes an input unit that inputs an input signal and an integrator which includes a differential operational amplifier having an offset voltage correction function. The integrator integrates the input signal input. A pulse-width modulator modulates the integration result of the integrator to generate a pulse signal having a pulse width reflective of the integration result. An output unit outputs the pulse signal. A feedback unit superimposes a signal output from the output unit on the input signal and feeds back the superimposed signal to the integrator. An input controller selectively set the input unit to a state where no signal is input. An output controller sets a voltage of an output from the feedback unit to a constant voltage.
摘要翻译： D类放大器包括输入单元，其输入输入信号和积分器，该积分器包括具有偏移电压校正功能的差分运算放大器。积分器集成输入信号输入。脉冲宽度调制器调制积分器的积分结果以产生具有反映积分结果的脉冲宽度的脉冲信号。输出单元输出脉冲信号。反馈单元将从输出单元输出的信号叠加在输入信号上，并将叠加的信号反馈给积分器。输入控制器选择性地将输入单元设置为不输入信号的状态。输出控制器将来自反馈单元的输出的电压设置为恒定电压。

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