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公开(公告)号：US4204176A
公开(公告)日：1980-05-20
申请号：US893014
申请日：1978-04-03
CPC分类号： H04B3/145
摘要： A variable equalizer whose frequency characteristic varies in a range of 1-1/Y(f).sup.2when the gain x of a variable amplifier varies from 0 (zero) to .infin. (infinity), and which reduces the number of shaping networks for the variable frequency characteristic.It is constructed of a forward pass circuit which consists of a variable amplifier and a frequency-dependent first circuit connected in the order mentioned between input and output terminals, a feedback pass circuit which is dependent upon the frequency and which feeds-back an output of the variable amplifier to an input thereof, and a feed forward pass circuit which is independent of the frequency and which feeds forward part of the input of the variable amplifier to an output of the first circuit.
摘要翻译： 当可变放大器的增益x从0（零）到INFINITY（无穷大）变化时，其频率特性在1-1 / Y（f）2的范围内变化的可变均衡器，并且这减少了 可变频率特性。 它由正向电路构成，该正向电路由可变放大器和按照输入和输出端之间的顺序连接的频率依赖的第一电路组成，反馈通道电路取决于频率，并且反馈输出 可变放大器到其输入端，以及前馈传输电路，其独立于频率，并且将可变放大器的输入的前部部分馈送到第一电路的输出。
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公开(公告)号：US4122417A
公开(公告)日：1978-10-24
申请号：US796539
申请日：1977-05-13
CPC分类号： H04B3/145
摘要： To form a simple and economical variable equalizer, the equalizer is constructed of a differential amplifier having two input terminals to which an input signal to be equalized and an equalized output signal derived from the output terminal are applied, a first impedance circuit connected between the differential amplifier and the output terminal, and a series circuit having a second impedance circuit and a variable resistor connected in series between the output terminal and a ground terminal.
摘要翻译： 为了形成简单而经济的可变均衡器，均衡器由具有两个输入端的差分放大器构成，输入端被均衡，输入信号得到均衡的输出信号，第一阻抗电路连接在差分 放大器和输出端子，以及具有在输出端子和接地端子之间串联连接的第二阻抗电路和可变电阻器的串联电路。
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公开(公告)号：US4097824A
公开(公告)日：1978-06-27
申请号：US772677
申请日：1977-02-28
摘要： A variable equalizer adapted to be fabricated in an integrated circuit structure and having improved compensation characteristics comprises a parallel connection of two circuits, one including a series connection of a first impedance circuit (impedance: Zy) and an input A.C. signal source circuit having a voltage v.sub.i, the other comprising a series connection of a second impedance circuit (impedance: Z.sub.x) and an A.C. signal source circuit having a voltage amplitude v.sub.z which is equal to v.sub.i (K/Z.sub.y).sup.2, where K is a constant, and the second impedance circuit, consists of a variable resistor.
摘要翻译： 适于以集成电路结构制造并具有改进的补偿特性的可变均衡器包括两个电路的并联连接，一个包括第一阻抗电路（阻抗：Zy）的串联连接和具有电压的输入AC信号源电路 vi，另一个包括第二阻抗电路（阻抗：Zx）和具有等于vi（K / Zy）2的电压幅度vz的AC信号源电路的串联连接，其中K是常数，第二 阻抗电路由可变电阻组成。
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公开(公告)号：US4292596A
公开(公告)日：1981-09-29
申请号：US66239
申请日：1979-08-13
申请人： Kohei Ishizuka , Yasuhiro Kita , Narimichi Maeda
发明人： Kohei Ishizuka , Yasuhiro Kita , Narimichi Maeda
摘要： A circuit for varying the gain of an amplifier circuit linearly in decibel by the use of a digital code signal varying linearly, wherein a resistance network to be connected between an amplifier having a fixed gain and an input or output portion for the amplification is connected and the gain of the amplifier as well as the values of resistance elements constituting the resistance network is set so that the transfer function of the amplifier circuit may become: ##EQU1## .
摘要翻译： 一种用于通过使用线性变化的数字码信号以分贝线性地改变放大器电路的增益的电路，其中连接在具有固定增益的放大器和用于放大的输入或输出部分之间的电阻网络被连接， 设置放大器的增益以及构成电阻网络的电阻元件的值，使得放大器电路的传递函数可以变为：
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公开(公告)号：US4187479A
公开(公告)日：1980-02-05
申请号：US860098
申请日：1977-12-13
CPC分类号： H04B3/145
摘要： A variable equalizer is provided which, using a single variable resistor, can make compensations in both the directions of the gain side, and the loss side and can set a reference gain as desired.An input signal to be equalized is received as an antiphase input signal of a differential amplifier, an output signal which has been equalized is fed back to the antiphase input signal, and a difference signal between an in-phase input signal and the antiphase input signal is delivered as an output. A resistor is connected between an input terminal and ground, first and second impedance circuits and a variable resistor are connected between an intermediate point of the first-mentioned resistor and ground in the order mentioned, and a voltage at the junction point between the first and second impedance circuits is used as the in-phase input signal.
摘要翻译： 提供了可变均衡器，其使用单个可变电阻器可以在增益侧和损耗侧的两个方向上进行补偿，并且可以根据需要设置参考增益。 接收待均衡的输入信号作为差分放大器的反相输入信号，将均衡的输出信号反馈到反相输入信号，同相输入信号和反相输入信号之间的差分信号 作为输出交付。 电阻器连接在输入端子和地之间，第一和第二阻抗电路和可变电阻器以所述顺序连接在第一个提到的电阻器的中间点和接地之间，并且在第一和第二阻抗电路之间的连接点处的电压 第二阻抗电路用作同相输入信号。
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公开(公告)号：US4101851A
公开(公告)日：1978-07-18
申请号：US745057
申请日：1976-11-26
申请人： Kohei Ishizuka , Yasuhiro Kita
发明人： Kohei Ishizuka , Yasuhiro Kita
摘要： A variable equalizer wherein a series circuit which consists of a voltage source and an impedance circuit having an impedance Z.sub.x is connected in parallel with a circuit for changing an input voltage into a current, and an impedance circuit having an impedance Z.sub.y is also connected in parallel with this current source. The voltage value of the voltage source is made one which is obtained by multiplying the current by a value proportional to 1/Z.sub.y, and the impedance circuit having the impedance Z.sub.y is endowed with a frequency characteristic.
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公开(公告)号：US4080580A
公开(公告)日：1978-03-21
申请号：US738901
申请日：1976-11-04
申请人： Yoshitaka Takasaki , Yasuhiro Kita , Jun'ichi Nakagawa , Kohei Ishizuka , Osamu Yumoto , Yoshinori Nagoya
发明人： Yoshitaka Takasaki , Yasuhiro Kita , Jun'ichi Nakagawa , Kohei Ishizuka , Osamu Yumoto , Yoshinori Nagoya
摘要： In order to realize a precision variable equalizer of little errors by a simple circuit arrangement, a plurality of variable transmission circuits having variable transfer coefficients are connected in series between input and output terminals, and feed-back and feed-forward are applied from input and output sides of the respective variable transmission circuits to input and output portions of the variable equalizer through transmission networks having specified transfer characteristics.
摘要翻译： 为了通过简单的电路布置实现误差小的精度可变均衡器，具有可变传输系数的多个可变传输电路串联连接在输入和输出端子之间，并且从输入和输出端口施加反馈和前馈 各可变传输电路的输出侧通过具有特定传输特性的传输网络来输入和输出可变均衡器的部分。
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8.发明授权
公开(公告)号：US4531089A
公开(公告)日：1985-07-23
申请号：US348013
申请日：1982-02-11
申请人： Kohei Ishizuka , Yasuhiro Kita , Narimichi Maeda , Masahiro Koya , Kazuhiko Takaoka , Yoshiro Kokuryo
发明人： Kohei Ishizuka , Yasuhiro Kita , Narimichi Maeda , Masahiro Koya , Kazuhiko Takaoka , Yoshiro Kokuryo
IPC分类号： G01R21/133 , H03G3/20 , G01R17/06 , G01R1/30 , G01R21/00
CPC分类号： H03G1/0088 , G01R21/133 , H03G3/30 , H03G3/3052
摘要： In a gain control circuit, an electric power calculating circuit is connected to a variable gain amplifier and a gain setting circuit for generating a gain control signal applied to the variable gain amplifier to control the gain thereof.
摘要翻译： 在增益控制电路中，电力计算电路连接到可变增益放大器和增益设置电路，用于产生施加到可变增益放大器以控制其增益的增益控制信号。
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公开(公告)号：US4477913A
公开(公告)日：1984-10-16
申请号：US368664
申请日：1982-04-15
申请人： Masahiro Koya , Narimichi Maeda , Kohei Ishizuka , Kazuhiko Takaoka , Yoshiro Kokuryo , Yasuhiro Kita
发明人： Masahiro Koya , Narimichi Maeda , Kohei Ishizuka , Kazuhiko Takaoka , Yoshiro Kokuryo , Yasuhiro Kita
CPC分类号： H04L27/01
摘要： An equalizer apparatus suitable for use in a MODEM for receiving a signal having passed through a number of carrier-band lines is disclosed in which the number of carrier-band lines is detected from a training signal, and electrical connection of a fixed equalizer to a variable equalizer is controlled on the basis of the number of carrier-band lines, in order to form a precise, simple automatic equalizer apparatus.
摘要翻译： 公开了一种适用于MODEM中用于接收已经通过多个载波频带的信号的均衡器装置，其中从训练信号检测载波带数的数目，并将固定均衡器与 可变均衡器基于载波频带数量进行控制，以便形成精确，简单的自动均衡器装置。
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公开(公告)号：US4004253A
公开(公告)日：1977-01-18
申请号：US587894
申请日：1975-06-18
摘要： An inductorless variable equalizer comprises input and output terminals. A first transmission network is situated in the forward path between the input and output terminals and has a variable transfer coefficient; second and third transmission networks are situated in the feedback and feedforward paths, respectively, between the input and output terminals. Each of these networks has a fixed transfer coefficient and the transfer coefficients of the feedback and feedforward networks having polarities opposite each other.
摘要翻译： 无电感可变均衡器包括输入和输出端子。 第一传输网络位于输入和输出端之间的前向路径中，具有可变传输系数; 第二和第三传输网络分别位于输入和输出端之间的反馈和前馈路径中。 这些网络中的每一个具有固定的传输系数和具有彼此相反的极性的反馈和前馈网络的传输系数。
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