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128 条记录 (耗时 0.03 秒)

    OPERATIONAL AMPLIFIER CIRCUIT, SAMPLE/HOLD CIRCUIT AND FILTER CIRCUIT USING THE OPERATIONAL AMPLIFIER CIRCUIT
    22.
    发明申请
    OPERATIONAL AMPLIFIER CIRCUIT, SAMPLE/HOLD CIRCUIT AND FILTER CIRCUIT USING THE OPERATIONAL AMPLIFIER CIRCUIT 失效
    操作放大器电路，采样/保持电路和使用运算放大器电路的滤波电路

    公开(公告)号：US20050285673A1

    公开(公告)日：2005-12-29

    申请号：US11216100

    申请日：2005-09-01

    申请人： Tetsuro Itakura ,  Takafumi Yamaji

    发明人： Tetsuro Itakura ,  Takafumi Yamaji

    IPC分类号： G11C27/02 ,  H03F3/45 ,  H03F3/68

    CPC分类号： H03F3/45475 ,  G11C27/024 ,  G11C27/026 ,  H03F3/45632 ,  H03F3/45928 ,  H03F3/45977 ,  H03F2203/45101 ,  H03F2203/45138 ,  H03F2203/45428 ,  H03F2203/45574 ,  H03H11/1243 ,  H03H11/32

    摘要： An operational amplifier circuit is constituted by first and second inverted amplifier circuits (A1, A2) that receive first and second input signals, a third inverted amplifier circuit (A3) that receives an estimated common-mode output signal and an output signal from the first inverted amplifier circuit and outputs first and second output signals, a fourth inverted amplifier circuit (A4) that receives the estimated common-mode output signal and an output signal from the second inverted amplifier circuit and outputs third and fourth output signals, where the estimated common-mode output signal is generated by adding the second output signal and the fourth output signal, and first and second non-inverted amplifier circuits (A5, A6) that receive the estimated common-mode output signal and feed it back to the first and second inverted amplifier circuits.

    摘要翻译： 运算放大器电路由接收第一和第二输入信号的第一和第二反相放大器电路（A 1，A 2）构成，第三反相放大器电路（A 3），其接收估计的共模输出信号和输出信号 从第一反相放大器电路输出第一和第二输出信号;第四反相放大电路（A 4），其接收估计的共模输出信号和来自第二反相放大器电路的输出信号，并输出第三和第四输出信号; 其中通过将第二输出信号和第四输出信号相加来产生估计的共模输出信号，以及接收估计的共模输出信号并将其馈送的第一和第二非反相放大器电路（A 5，A 6） 回到第一和第二反相放大器电路。

    Multiple input analog-to-digital conversion apparatus and radio receiver using the same
    23.
    发明申请
    Multiple input analog-to-digital conversion apparatus and radio receiver using the same 有权
    多输入模数转换装置和使用其的无线电接收机

    公开(公告)号：US20050219101A1

    公开(公告)日：2005-10-06

    申请号：US11088077

    申请日：2005-03-23

    申请人： Daisuke Kurose ,  Takafumi Yamaji ,  Tetsuro Itakura

    发明人： Daisuke Kurose ,  Takafumi Yamaji ,  Tetsuro Itakura

    IPC分类号： H03M1/12 ,  H03M1/06 ,  H03M1/10 ,  H03M1/44

    CPC分类号： H03M1/123 ,  H03M1/0695 ,  H03M1/1205 ,  H03M1/44

    摘要： A multiple input AD conversion apparatus includes a first unit AD converter including a plurality of first conversion stages connected in cascade to convert a first analog input signal to a first digital output signal, a second unit AD converter including a plurality of second conversion stages connected in cascade to convert a second analog input signal to a second digital output signal, and an operational amplifier shared between the first conversion stage and the second conversion stage in a time sharing.

    摘要翻译： 多输入AD转换装置包括：第一单元AD转换器，包括级联连接的多个第一转换级，以将第一模拟输入信号转换为第一数字输出信号;第二单元AD转换器，包括多个第二转换级， 级联以将第二模拟输入信号转换为第二数字输出信号，以及在时间共享中在第一转换级与第二转换级之间共享的运算放大器。

    Balanced amplifier and filter using the same
    24.
    发明授权
    Balanced amplifier and filter using the same 失效
    平衡放大器和滤波器使用相同

    公开(公告)号：US06781464B2

    公开(公告)日：2004-08-24

    申请号：US10281103

    申请日：2002-10-28

    申请人： Takeshi Ueno ,  Tetsuro Itakura ,  Zdzislaw Czarnul

    发明人： Takeshi Ueno ,  Tetsuro Itakura ,  Zdzislaw Czarnul

    IPC分类号： H03F345

    CPC分类号： H03F3/211 ,  H03F3/45475 ,  H03F3/45632 ,  H03F3/45766 ,  H03F3/45928 ,  H03F3/45991 ,  H03F2203/45138 ,  H03H11/045 ,  H03H11/32

    摘要： A balanced amplifier comprising a pair of voltage-to-current converters including a first input terminal, a second input terminal, a first output terminal and a second output terminal to convert an input voltage applied to the first input terminal into an output current output from each of the first output terminal and the second output terminal, the second input terminal and the second output terminal of one of the converters being connected to the second input terminal and the second output terminal of the other of the converters to cancel common-mode components each other and extract differential-mode components.

    摘要翻译： 一种平衡放大器，包括一对电压 - 电流转换器，包括第一输入端子，第二输入端子，第一输出端子和第二输出端子，用于将施加到第一输入端子的输入电压转换为从 第一输出端子和第二输出端子，其中一个转换器的第二输入端子和第二输出端子连接到另一个转换器的第二输入端子和第二输出端子，以抵消共模元件 并提取差分模式组件。

    Variable gain amplifier
    26.
    发明授权
    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.

    Frequency converter
    27.
    发明授权
    Frequency converter 失效
    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。

    Balanced amplifier using single-ended output operational amplifiers
    28.
    发明授权
    Balanced amplifier using single-ended output operational amplifiers 失效
    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。

    Current mirror circuit
    29.
    发明授权
    Current mirror circuit 失效
    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。