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21. 发明授权

US06690232B2 Variable gain amplifier 失效
公开(公告)号：US06690232B2
公开(公告)日：2004-02-10
申请号：US10210057
申请日：2002-08-02
申请人： Takashi Ueno , Tadashi Arai , Tetsuro Itakura
发明人： Takashi Ueno , Tadashi Arai , Tetsuro Itakura
IPC分类号： H03F136
CPC分类号： H03G9/16
摘要： A variable gain amplifier device comprises a variable gain amplifier circuit which amplifies a difference between an input signal and a feedback signal to output an output signal, a feedback circuit which supplies the feedback signal to the variable gain amplifier circuit, and a controller which controls the variable gain amplifier circuit and the feedback circuit to decrease a cutoff frequency of the feedback circuit according to increase of a gain of the variable gain amplifier circuit or vice versa.

22. 发明授权

US06381449B1 Frequency converter 失效
标题翻译：频率转换器
公开(公告)号：US06381449B1
公开(公告)日：2002-04-30
申请号：US09337525
申请日：1999-06-22
申请人： Takafumi Yamaji , Tetsuro Itakura , Hiroshi Tanimoto
发明人： Takafumi Yamaji , Tetsuro Itakura , Hiroshi Tanimoto
IPC分类号： H04B126
CPC分类号： H03D7/1433 , H03D7/1425 , H03D2200/0084 , H03D2200/0088
摘要： A frequency converter including a mixer circuit which inputs a local oscillation signal and a radio-frequency input signal modulated for communication of information, and performs frequency conversion. A buffer amplifier is higher than a desired signal frequency band, and has a low-pass passage characteristic of cut-off frequency lower than an adjacent channel carrier frequency.
摘要翻译：一种变频器，包括输入本地振荡信号的混频电路和用于信息通信调制的射频输入信号，并进行频率转换。缓冲放大器高于期望的信号频带，并且具有低于相邻信道载波频率的截止频率的低通通道特性。

23. 发明授权

US5990737A Balanced amplifier using single-ended output operational amplifiers 失效
标题翻译：平衡放大器采用单端输出运算放大器
公开(公告)号：US5990737A
公开(公告)日：1999-11-23
申请号：US66933
申请日：1998-04-28
申请人： Zdzislaw Czarnul , Hiroshi Tanimoto , Tetsuro Itakura
发明人： Zdzislaw Czarnul , Hiroshi Tanimoto , Tetsuro Itakura
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/45475 , H03F3/45645 , H03F3/45659 , H03F3/45941 , H03F2203/45138
摘要： A balanced amplifier includes first and second multi-input single-ended output differential amplifiers having matched characteristics and a feedback circuit. The feedback circuit connects differential input terminals and output terminals of the first and second multi-input single-ended output differential amplifiers so that all of the differential input terminals of the first and second multi-input single-ended output differential amplifiers are virtually shorted.
摘要翻译：平衡放大器包括具有匹配特性的第一和第二多输入单端输出差分放大器以及反馈电路。反馈电路连接第一和第二多输入单端输出差分放大器的差分输入端和输出端，使得第一和第二多输入单端输出差分放大器的所有差分输入端实际上短路。

24. 发明授权

US5986507A Current mirror circuit 失效
标题翻译：电流镜电路
公开(公告)号：US5986507A
公开(公告)日：1999-11-16
申请号：US716714
申请日：1996-09-12
申请人： Tetsuro Itakura , Zdzislaw Czarnul
发明人： Tetsuro Itakura , Zdzislaw Czarnul
IPC分类号： G05F3/26 , H03F3/04 , H03F3/345 , H03F99/00
CPC分类号： H03F3/345 , G05F3/262
摘要： A current mirror circuit comprises a first current-to-voltage converter for inputting an input current, a second current-to-voltage converter, a first transistor, the collector or drain of which outputs an output current, and the emitter or source of which is connected to the second current-to-voltage converter, and a control unit for controlling a control electrode of the first transistor. The control unit refers a voltage current-to-voltage converted by the first and second current-to-voltage converters to control the first transistor so that currents flow from the control unit to the first and second current-to-voltage converters at a predetermined ratio.
摘要翻译：电流镜电路包括用于输入输入电流的第一电流 - 电压转换器，第二电流 - 电压转换器，第一晶体管，其集电极或漏极输出输出电流，其发射极或源极连接到第二电流 - 电压转换器，以及用于控制第一晶体管的控制电极的控制单元。控制单元是指由第一和第二电流 - 电压转换器转换的电压电流 - 电压以控制第一晶体管，使得电流以预定的方式从控制单元流向第一和第二电流 - 电压转换器比。

25. 发明授权

US5867777A Variable-gain amplifier circuit, offset control method in variable-gain amplifier circuit, radio receiver with variable-gain amplifier circuit, and radio receiving method in radio receiver with variable-gain amplifier 失效
标题翻译：可变增益放大器电路，可变增益放大器电路中的偏移控制方法，具有可变增益放大器电路的无线电接收器和具有可变增益放大器的无线电接收机中的无线电接收方法
公开(公告)号：US5867777A
公开(公告)日：1999-02-02
申请号：US702154
申请日：1996-08-23
申请人： Takafumi Yamaji , Tetsuro Itakura , Hiroshi Tsurumi
发明人： Takafumi Yamaji , Tetsuro Itakura , Hiroshi Tsurumi
IPC分类号： H03G3/12 , H03F3/45 , H03F3/72 , H04B1/16 , H04B1/18
CPC分类号： H03G1/0088 , H03F1/0277 , H03F3/195 , H03F3/45475 , H03F3/45968 , H03F3/45977 , H03F3/72 , H03G3/3078 , H03F2200/165 , H03F2200/294 , H03F2200/451 , H03F2203/45212 , H03F2203/45512 , H03F2203/45514 , H03F2203/45522 , H03F2203/45528 , H03F2203/45534 , H03F2203/45536 , H03F2203/45544 , H03F2203/45551 , H03F2203/45586 , H03F2203/45588 , H03F2203/45616 , H03F2203/45622 , H03F2203/7209 , H03F2203/7215 , H03F2203/7221 , H03F2203/7236
摘要： A variable-gain amplifier circuit has an offset correcting function by which the fluctuation of offset due to the switching of a gain is decreased. In an offset detection mode, an input offset voltage of the variable-gain amplifier circuit is inputted to an offset retaining section, and in a signal amplifying mode, the offset is corrected by subtracting the output of the offset retaining section from an input signal by means of an input section of the variable-gain amplifier circuit. In addition, the variable-gain amplifier circuit can be applied to a radio receiver. The offset produced in a baseband section of a receiver is corrected by the offset correcting function of the variable-gain amplifier circuit, so as to prevent the quality of communication from being deteriorated.
摘要翻译：可变增益放大器电路具有偏移校正功能，通过该偏移校正功能减小由于增益切换引起的偏移的波动。在偏移检测模式中，可变增益放大器电路的输入偏移电压被输入到偏移保持部分，并且在信号放大模式中，通过从输入信号中减去偏移保持部分的输出来校正偏移量可变增益放大器电路的输入部分的装置。此外，可变增益放大器电路可以应用于无线电接收机。通过可变增益放大器电路的偏移校正功能校正接收机的基带部分产生的偏移，以防止通信质量恶化。

26. 发明授权

US08797205B2 A/D conversion device and radio device 有权
标题翻译： A / D转换装置和无线电装置
公开(公告)号：US08797205B2
公开(公告)日：2014-08-05
申请号：US13413793
申请日：2012-03-07
申请人： Masanori Furuta , Tetsuro Itakura
发明人： Masanori Furuta , Tetsuro Itakura
IPC分类号： H03M1/12
CPC分类号： H03M1/164 , H03M1/466
摘要： This A/D convertor includes: a first D/A conversion unit configured to sample an analog input signal, and to generate a first difference signal by performing successive comparison of the analog input signal based on a reference voltage; a precharge capacitor unit configured to hold the reference voltage; a first comparing unit configured to compare the first difference signal with a reference value to generate a first digital signal; and an amplifying unit configured to calculate by using the first difference signal and the reference voltage to generate a residual signal.
摘要翻译：该A / D转换器包括：第一D / A转换单元，被配置为对模拟输入信号进行采样，并且通过基于参考电压执行模拟输入信号的连续比较来产生第一差分信号; 配置为保持所述参考电压的预充电电容器单元; 第一比较单元，被配置为将所述第一差分信号与参考值进行比较，以产生第一数字信号; 以及放大单元，被配置为通过使用第一差分信号和参考电压来计算以产生残留信号。

27. 发明授权

US08723713B2 Signal interpolation device and parallel A/D converting device 失效
标题翻译：信号插值装置和并行A / D转换装置
公开(公告)号：US08723713B2
公开(公告)日：2014-05-13
申请号：US13717410
申请日：2012-12-17
申请人： Junya Matsuno , Tetsuro Itakura
发明人： Junya Matsuno , Tetsuro Itakura
IPC分类号： H03M1/36
CPC分类号： H03H11/22 , H03M1/204 , H03M1/205 , H03M1/36 , H03M1/365
摘要： There is provided a signal interpolation device, including: a first amplifier to generate a first signal representing a difference between an input signal and a first reference voltage; a second amplifier to generate a second signal representing a difference between the input signal and a second reference voltage; a first output amplifier to amplify the first signal to generate a first output signal; a second output amplifier to amplify the second signal to generate a second output signal; a third output amplifier to amplify a sum of a first interpolation signal and the first signal to generate a third output signal, the first interpolation signal representing a voltage generated by dividing a difference between the first reference voltage and the second reference voltage by “2^n”; and a fourth output amplifier to amplify a difference between the second signal and the first interpolation signal to generate a fourth output signal.
摘要翻译：提供了一种信号插值装置，包括：第一放大器，用于产生表示输入信号和第一参考电压之间的差的第一信号; 第二放大器，用于产生表示所述输入信号和第二参考电压之间的差的第二信号; 第一输出放大器，用于放大第一信号以产生第一输出信号; 第二输出放大器，用于放大第二信号以产生第二输出信号; 第三输出放大器，用于放大第一内插信号和第一信号的和以产生第三输出信号，第一内插信号表示通过将第一参考电压和第二参考电压之差除以“2 ^ n“; 以及第四输出放大器，用于放大第二信号和第一内插信号之间的差以产生第四输出信号。

28. 发明授权

US08410762B2 DC-DC converter 有权
标题翻译： DC-DC转换器
公开(公告)号：US08410762B2
公开(公告)日：2013-04-02
申请号：US13306119
申请日：2011-11-29
申请人： Takeshi Ueno , Tetsuro Itakura
发明人： Takeshi Ueno , Tetsuro Itakura
IPC分类号： G05F1/613 , G05F1/40
CPC分类号： H02M3/1588 , Y02B70/1466
摘要： The high-side switch has one end connected to the input terminal. The low-side switch has one end connected to other end of the high-side switch and other end connected to a ground terminal. The inductor has one end connected to the other end of the high-side switch and other end connected to the output terminal. The capacitor has one end connected to the other end of the inductor and other end connected to the ground terminal. The high-side switch controlling circuit generates and supplies a high-side switch controlling signal based on a target voltage of the output terminal, the output voltage of the output terminal, and a current flowing through the capacitor, to the high-side switch. The low-side switch controlling circuit generates and supplies a low-side switch controlling signal based on the high-side switch controlling signal and a current flowing through the inductor, to the low-side switch.
摘要翻译：高边开关的一端连接到输入端。低侧开关的一端连接到高侧开关的另一端，另一端连接到接地端子。电感器的一端连接到高侧开关的另一端，另一端连接到输出端子。电容器的一端连接到电感器的另一端，另一端连接到接地端子。高侧开关控制电路基于输出端子的目标电压，输出端子的输出电压和流过电容器的电流产生并提供高侧开关控制信号到高侧开关。低侧开关控制电路基于高侧开关控制信号和流过电感器的电流产生并提供低侧开关控制信号到低侧开关。

29. 发明授权

US07865163B2 Time constant automatic adjusting circuit, filter circuit system, and method of automatically adjusting time constant 失效
标题翻译：时间常数自动调节电路，滤波电路系统及自动调整时间常数的方法
公开(公告)号：US07865163B2
公开(公告)日：2011-01-04
申请号：US12407442
申请日：2009-03-19
申请人： Osamu Watanabe , Rui Ito , Shigehito Saigusa , Tetsuro Itakura
发明人： Osamu Watanabe , Rui Ito , Shigehito Saigusa , Tetsuro Itakura
IPC分类号： H04B1/10
CPC分类号： H03H11/1291
摘要： A time constant automatic adjusting circuit comprises: a filter circuit varying a phase of an clock signal to be input so as to output the clock signal; a phase comparison circuit comparing a phase of an output signal of the filter circuit with the phase of the clock signal, and outputting a predetermined voltage when the phase of the output signal and the phase of the clock signal are the same; at least three comparators comparing the output voltage with a plurality of different voltages; an up-down counter counting a number of output bits of either one of the at least three different voltages in accordance with an output result of the comparators; and a control circuit varying the time constant of the filter circuit in accordance with the number of output bits counted by the up-down counter.
摘要翻译：时间常数自动调整电路包括：滤波器电路，改变输入时钟信号的相位以输出时钟信号; 相位比较电路，将滤波器电路的输出信号的相位与时钟信号的相位进行比较，并且当输出信号的相位和时钟信号的相位相同时输出预定电压; 至少三个比较器将输出电压与多个不同电压进行比较; 根据比较器的输出结果，计数至少三个不同电压中的任何一个的输出位的数量的递减计数器; 以及控制电路根据由升降计数器计数的输出位数来改变滤波电路的时间常数。

30. 发明申请

US20100237829A1 ASSEMBLED BATTERY SYSTEM AND ASSEMBLED BATTERY PROTECTION DEVICE 有权
标题翻译：组装电池系统和组装电池保护装置
公开(公告)号：US20100237829A1
公开(公告)日：2010-09-23
申请号：US12726828
申请日：2010-03-18
申请人： Yoshinao TATEBAYASHI , Shoji Otaka , Tetsuro Itakura , Norio Takami
发明人： Yoshinao TATEBAYASHI , Shoji Otaka , Tetsuro Itakura , Norio Takami
IPC分类号： H02J7/00
CPC分类号： H02J7/0026 , H01M4/661 , H01M10/052 , H01M10/425 , H01M10/441 , H01M10/482 , Y02T10/7055
摘要： An assembled battery system includes an assembled battery including a plurality of electric cell blocks connected in series, the electric cell blocks each including at least one nonaqueous electrolyte secondary battery provided with a negative electrode current collector formed of aluminum or an aluminum alloy, a voltage measuring unit configured to measure a plurality of voltages of the electric cell blocks, a controller which controls charge/discharge of the assembled battery in accordance with the measured voltages, and bypass circuits connected in parallel to the electric cell blocks, the bypass circuits each bypassing a current that flows from a negative electrode of one of the electric cell blocks to a positive electrode of the one of electric cell blocks when the measured voltage of the one of electric cell blocks is a negative value not greater than a threshold value.
摘要翻译：组合电池系统包括：串联连接的多个电池块的组电池，每个电池块包括至少一个设置有由铝或铝合金形成的负极集电体的非水电解质二次电池，电压测量被配置为测量电池单元块的多个电压的单元，根据测量的电压控制组电池的充电/放电的控制器，以及与电池块并联连接的旁路电路，旁路电路绕过当一个电池块的测量电压为不大于阈值的负值时，电流从电池单元块中的一个的负极流向电池单元块中的一个的正极。

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