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84 条记录 (耗时 0.071 秒)

    AD CONVERTER AND RADIO RECEIVER
    71.
    发明申请
    AD CONVERTER AND RADIO RECEIVER 失效
    AD转换器和无线接收器

    公开(公告)号：US20070194971A1

    公开(公告)日：2007-08-23

    申请号：US11623803

    申请日：2007-01-17

    申请人： Takafumi Yamaji ,  Takeshi Ueno

    发明人： Takafumi Yamaji ,  Takeshi Ueno

    IPC分类号： H03M1/12

    CPC分类号： H03M1/123 ,  H03M1/44 ,  H03M1/46

    摘要： Disclosed is an AD converter including: a first conversion stage including a quantizing part to generate m parallel pieces of quantized signals from m pieces of input analog signals representing n-dimensional vectors (n

    摘要翻译： 公开了一种AD转换器，包括：第一转换级，包括量化部分，用于从表示n维向量（n

    Multiplier and radio communication apparatus using the same
    72.
    发明申请
    Multiplier and radio communication apparatus using the same 失效
    乘法器和使用它的无线电通信装置

    公开(公告)号：US20070026835A1

    公开(公告)日：2007-02-01

    申请号：US11386658

    申请日：2006-03-22

    申请人： Takafumi Yamaji ,  Hidenori Okuni

    发明人： Takafumi Yamaji ,  Hidenori Okuni

    IPC分类号： H04B1/26 ,  H04B15/00

    CPC分类号： H04B1/30

    摘要： A multiplier includes a first input terminal which receives a modulated signal, three second input terminals which receive first, second, and third local signals respectively, the first, second, and third local signals having a phase difference of 120° from one another, a multiplication unit configured to multiply the modulated signal by each of the first, second, and third local signals, and output first, second, and third multiplied output signals, and three output terminals from which the first, second, and third multiplied output signals are derived, respectively.

    摘要翻译： 乘法器包括接收调制信号的第一输入端子，分别接收第一，第二和第三局部信号的三个第二输入端，第一，第二和第三局部信号彼此之间具有120°的相位差， 乘法单元，被配置为将调制信号乘以第一，第二和第三本地信号中的每一个，并输出第一，第二和第三相乘的输出信号，以及三个输出端，第一，第二和第三相乘输出信号是 派生。

    Amplifier, filter using the same, and radio communication device
    73.
    发明申请
    Amplifier, filter using the same, and radio communication device 审中-公开
    放大器，使用相同的滤波器和无线电通信设备

    公开(公告)号：US20070024359A1

    公开(公告)日：2007-02-01

    申请号：US11387317

    申请日：2006-03-23

    申请人： Takafumi Yamaji ,  Rui Ito ,  Tetsuro Itakura

    发明人： Takafumi Yamaji ,  Rui Ito ,  Tetsuro Itakura

    IPC分类号： H03F3/45

    CPC分类号： H03F3/193 ,  H03F3/45085 ,  H03F3/45183 ,  H03F2203/45352

    摘要： An amplifier includes an amplification unit which amplify a first difference between first and second input signals, a second difference between second and third input signals and a third difference between third and first input signals by a differential mode gain, and amplify an average of the first, second and third input signal by a common mode gain, for outputting a first output signal corresponding to a sum of the amplified first difference and the amplified average, a second output signal corresponding to a sum of the amplified second difference and the amplified average, and a third output signal corresponding to a sum of the amplified third difference and amplified average; first, second; and a reduction circuit which reduces the common mode gain less than the differential mode gain.

    摘要翻译： 放大器包括放大单元，其放大第一和第二输入信号之间的第一差值，第二和第三输入信号之间的第二差值以及第三和第一输入信号之间的差分模式增益的第三差值，并放大第一和第二输入信号的平均值 通过共模增益输出第二和第三输入信号，用于输出对应于放大的第一差和放大的平均的和的第一输出信号，对应于放大的第二差和放大的平均之和的第二输出信号， 以及对应于放大的第三差和放大的平均值之和的第三输出信号; 第一秒; 以及减小电路，其减小小于差分模式增益的共模增益。

    OPERATIONAL AMPLIFIER CIRCUIT, SAMPLE/HOLD CIRCUIT AND FILTER CIRCUIT USING THE OPERATIONAL AMPLIFIER CIRCUIT
    75.
    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
    76.
    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。

    Frequency converter
    80.
    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。