公开(公告)号：US5258716A

公开(公告)日：1993-11-02

申请号：US913868

申请日：1992-07-15

申请人： Hiroshi Kondo ,  Tsuneo Tohyama ,  Hiroshi Tanigawa ,  Isao Fukai

发明人： Hiroshi Kondo ,  Tsuneo Tohyama ,  Hiroshi Tanigawa ,  Isao Fukai

IPC分类号： H03H11/12 ,  H03H11/18 ,  H03F1/34

CPC分类号： H03H11/18

摘要： An all-pass filter includes an adder which comprises a variable conductance amplifier and a capacitor connected to the output terminal thereof. The adder is being arranged to add the output of a band pass filter and an input signal together.

摘要翻译： 全通滤波器包括加法器，其包括可变电导放大器和连接到其输出端的电容器。 加法器被布置成将带通滤波器的输出和输入信号加在一起。

公开(公告)号：US5028884A

公开(公告)日：1991-07-02

申请号：US527575

申请日：1990-05-23

申请人： Hiroshi Kondo ,  Tsuneo Tohyama ,  Takeyuki Kouti

发明人： Hiroshi Kondo ,  Tsuneo Tohyama ,  Takeyuki Kouti

IPC分类号： H03H11/04 ,  H03H11/12

CPC分类号： H03H11/126

摘要： A leapfrog filter comprising a first and a second integrator each consisting of an operational amplifier and integrating capacitor. The leapfrog filter includes differential amplifier which is arranged to differentially supply current to the first and second integrators through a first and a second current source circuit respectively; and a third current source circuit for adjusting the sum of currents supplied to the first and second current source circuits, wherein characteristics such as the center frequency f.sub.o and quality factor Q of the leapfrog filter are controlled by adjusting the respective current values.

摘要翻译： 一种跨越滤波器，包括由运算放大器和积分电容器组成的第一和第二积分器。 跨越滤波器包括差分放大器，其被布置成通过第一和第二电流源电路差分地向第一和第二积分器提供电流; 以及第三电流源电路，用于调节提供给第一和第二电流源电路的电流之和，其中通过调整各个电流值来控制跨越滤波器的中心频率fo和品质因数Q的特性。

公开(公告)号：US5298813A

公开(公告)日：1994-03-29

申请号：US863413

申请日：1992-04-03

申请人： Hiroshi Tanigawa ,  Isao Fukai ,  Hiroshi Kondo ,  Tsuneo Tohyama

发明人： Hiroshi Tanigawa ,  Isao Fukai ,  Hiroshi Kondo ,  Tsuneo Tohyama

IPC分类号： H03H11/12 ,  H03H11/04 ,  H03F34/04 ,  H03F1/34

CPC分类号： H03H11/0466 ,  H03H11/045

摘要： A polar leapfrog filter includes at least one polar network. The polar network comprises a differentiator constituted by an operational amplifier having input and output terminals, and a first integrator formed by a first capacitor for providing negative feedback to the operational amplifier and a first variable transconductance amplifier; and a second integrator formed by a second capacitor for providing negative feedback to the first integrator, and a second variable transconductance amplifier. A differentiator is provided at each of the input and output portions of the filter, and a third differentiator is provided immediately preceding the output side differentiator. In the case where two or more said polar networks are incorporated, an additional differentiator is provided between the polar networks. The sum of the number of the circuits constituting the differentiators and the number of the polar networks is selected to be even and equal to the order of the filter. The adjacent ones of the circuits are connected in such a manner that leapfrog type negative feedback is effected, and the differentiators except the output side one are constructed in the form of self negative feedback type.

摘要翻译： 极地跨越式过滤器包括至少一个极性网络。 极性网络包括由具有输入和输出端子的运算放大器构成的微分器和由用于向运算放大器提供负反馈的第一电容器和由第一可变跨导放大器形成的第一积分器; 以及由用于向第一积分器提供负反馈的第二电容器形成的第二积分器和第二可变跨导放大器。 在滤波器的每个输入和输出部分设置微分器，并且紧邻输出侧微分器之前提供第三微分器。 在并入两个或更多个所述极性网络的情况下，在极性网络之间提供附加的微分器。 构成微分器的电路的数量和极性网络的数量之和被选择为均匀且等于滤波器的次序。 相邻的电路以跨越式负反馈的方式连接，除输出侧之外的微分器以自负反馈型的形式构成。

公开(公告)号：US5296763A

公开(公告)日：1994-03-22

申请号：US858010

申请日：1992-03-26

申请人： Hiroshi Tanigawa ,  Hiroshi Kondo ,  Isao Fukai ,  Tsuneo Tohyama

发明人： Hiroshi Tanigawa ,  Hiroshi Kondo ,  Isao Fukai ,  Tsuneo Tohyama

IPC分类号： H03H11/12 ,  H03H11/04 ,  H03F3/04

CPC分类号： H03H11/0466 ,  H03H11/045

摘要： A polar leapfrog filter includes at least one polar network. The polar network comprises a differentiator constituted by an operational amplifier having input and output terminals, and a first integrator formed by a first capacitor for providing negative feedback to the operational amplifier and a first variable transconductance amplifier; and a second integrator formed by a second capacitor for providing negative feedback to the first integrator, and a second variable transconductance amplifier. In the case where two or more said polar networks are incorporated, an integrator is provided between adjacent ones of the polar networks. The total number of all the circuits is selected to be odd and equal to the order of the filter. The adjacent ones of the circuits are connected in such a manner that leapfrog type negative feedback is effected.

摘要翻译： 极地跨越式过滤器包括至少一个极性网络。 极性网络包括由具有输入和输出端子的运算放大器构成的微分器和由用于向运算放大器提供负反馈的第一电容器和由第一可变跨导放大器形成的第一积分器; 以及由用于向第一积分器提供负反馈的第二电容器形成的第二积分器和第二可变跨导放大器。 在并入两个或多个所述极性网络的情况下，在相邻的极性网络之间提供积分器。 所有电路的总数被选择为奇数，并且等于滤波器的顺序。 相邻的电路以跨越式负反馈的方式连接。

公开(公告)号：US5293086A

公开(公告)日：1994-03-08

申请号：US858063

申请日：1992-03-26

申请人： Hiroshi Tanigawa ,  Hiroshi Kondo ,  Tsuneo Tohyama ,  Isao Fukai

发明人： Hiroshi Tanigawa ,  Hiroshi Kondo ,  Tsuneo Tohyama ,  Isao Fukai

IPC分类号： H03H11/12 ,  H03H11/04 ,  H03F3/64 ,  H03F1/34

CPC分类号： H03H11/0466 ,  H03H11/045

摘要： A polar leapfrog filter includes at least one polar network. The polar network comprises a differentiator constituted by an operational amplifier having input and output terminals, and a first integrator formed by a first capacitor for providing negative feedback to the operational amplifier and a first variable transconductance amplifier; and a second integrator formed by a second capacitor for providing negative feedback to the first integrator, and a second variable transconductance amplifier. An integrator is provided at each of the input and output stages, and a third integrator is provided immediately preceding the output side integrator. In the case where two or more said polar networks are incorporated, an additional integrator is provided between the polar networks. The total number of all the circuits is selected to be even and equal to the order of the filter. The adjacent ones of the circuits are connected in such a manner that leapfrog type negative feedback is effected, and only the input side integrator is constructed in the form of self negative feedback type.

摘要翻译： 极地跨越式过滤器包括至少一个极性网络。 极性网络包括由具有输入和输出端子的运算放大器构成的微分器和由用于向运算放大器提供负反馈的第一电容器和由第一可变跨导放大器形成的第一积分器; 以及由用于向第一积分器提供负反馈的第二电容器形成的第二积分器和第二可变跨导放大器。 在每个输入和输出级提供积分器，并且在输出侧积分器之前提供第三积分器。 在并入两个或更多个所述极性网络的情况下，在极性网络之间提供附加积分器。 所有电路的总数选择为均匀且等于滤波器的顺序。 相邻的电路以跨越式负反馈的方式连接，只有输入侧积分器构成自负反馈型的形式。

公开(公告)号：US5182522A

公开(公告)日：1993-01-26

申请号：US863205

申请日：1992-04-03

申请人： Hiroshi Tanigawa ,  Hiroshi Kondo ,  Isao Fukai ,  Tsuneo Tohyama

发明人： Hiroshi Tanigawa ,  Hiroshi Kondo ,  Isao Fukai ,  Tsuneo Tohyama

IPC分类号： H03H11/12 ,  H03H11/04

CPC分类号： H03H11/0466 ,  H03H11/045

摘要： A polar leapfrog filter includes at least one polar network. The polar network comprises a differentiator constituted by an operational amplifier having input and output terminals, and a first integrator formed by a first capacitor for providing negative feedback to the operational amplifier and a first variable transconductance amplifier; and a second integrator formed by a second capacitor for providing negative feedback to the first integrator, and a second variable transconductance amplifier. A differentiator is provided at each of the input and output stages of the filter. In the case where two or more said polar networks are incorporated, an additional differentiator is provided between the polar networks. The total number of all the circuit units constituting the filter is selected to provide odd order and equal order for the filter. The circuit units are connected in such a manner that leapfrog type negative feedback is effected.

摘要翻译： 极地跨越式过滤器包括至少一个极性网络。 极性网络包括由具有输入和输出端子的运算放大器构成的微分器和由用于向运算放大器提供负反馈的第一电容器和由第一可变跨导放大器形成的第一积分器; 以及由用于向第一积分器提供负反馈的第二电容器形成的第二积分器和第二可变跨导放大器。 在滤波器的每个输入和输出级设置微分器。 在并入两个或更多个所述极性网络的情况下，在极性网络之间提供附加的微分器。 选择构成滤波器的所有电路单元的总数，以为滤波器提供奇数阶和相等的顺序。 电路单元以跨越式负反馈的方式连接。

公开(公告)号：US5177382A

公开(公告)日：1993-01-05

申请号：US798215

申请日：1991-11-26

申请人： Hiroshi Kondo ,  Hiroshi Tanigawa ,  Tsuneo Tohyama ,  Isao Fukai

发明人： Hiroshi Kondo ,  Hiroshi Tanigawa ,  Tsuneo Tohyama ,  Isao Fukai

IPC分类号： H03H11/04 ,  H03H11/12

CPC分类号： H03H11/0466

摘要： An active filter circuit comprises a differentiator constituted by an operational amplifier having an input terminal and output terminal, and a first integrator constituted by a first capacitor and a first variable conductance amplifier for providing negative feedback to the operational amplifier and a first variable conductance amplifier; and a second integrator constituted by a second capacitor and a second variable conductance amplifier for providing negative feedback to the first integrator. The active filter circuit is arranged such that a damping pole is set up at a predetermined frequency by adjusting operating currents of the first and second variable conductance amplifiers.

摘要翻译： 有源滤波器电路包括由具有输入端和输出端的运算放大器构成的微分器和由第一电容器和第一可变电导放大器构成的第一积分器，用于向运算放大器提供负反馈和第一可变电导放大器; 以及由第二电容器和第二可变电导放大器构成的第二积分器，用于向第一积分器提供负反馈。 有源滤波器电路被布置成使得通过调节第一和第二可变电导放大器的工作电流来将阻尼极以预定频率设置。

公开(公告)号：US5138279A

公开(公告)日：1992-08-11

申请号：US550335

申请日：1990-07-09

申请人： Hiroshi Kondo ,  Tsuneo Tohyama

发明人： Hiroshi Kondo ,  Tsuneo Tohyama

IPC分类号： H03H11/12

CPC分类号： H03H11/126

摘要： A leapfrog filter comprises a first integrator made up of a first operational amplifier and a first capacitor connected to output terminal of the first operational amplifier; a second integrator made up of a second operational amplifier and a second capacitor connected to inverting input terminal and output terminal of the second operational amplifier; and a variable current source circuit. The first operational amplifier has the output terminal thereof connected to non-inverting input terminal of the second operational amplifier. The second operational amplifier has the output terminal thereof connected to inverting input terminal of the first operational amplifier. An input terminal is connected to non-inverting input terminal of the first operational amplifier; and output terminal connected to the output terminal of the second operational amplifier. The variable current source circuit is arranged such that bias currents supplied to the first and second operational amplifiers are controlled so as to change mutual conductances of the first and first operational amplifiers, thereby adjusting pass band width of the filter while at the same time restraining occurrence of in-band ripple.

摘要翻译： 跨越滤波器包括由第一运算放大器和连接到第一运算放大器的输出端的第一电容器构成的第一积分器; 由第二运算放大器和连接到第二运算放大器的反相输入端和输出端的第二电容器组成的第二积分器; 和可变电流源电路。 第一运算放大器的输出端连接到第二运算放大器的非反相输入端。 第二运算放大器的输出端连接到第一运算放大器的反相输入端。 输入端子连接到第一运算放大器的非反相输入端; 和输出端连接到第二运算放大器的输出端。 可变电流源电路被布置成使得提供给第一和第二运算放大器的偏置电流被控制以便改变第一和第一运算放大器的互导，从而调节滤波器的通带宽度，同时抑制发生 的带内纹波。

公开(公告)号：US5216375A

公开(公告)日：1993-06-01

申请号：US764912

申请日：1991-09-24

申请人： Hiroshi Tanigawa ,  Hiroshi Kondou ,  Tsuneo Tohyama ,  Isao Fukai

发明人： Hiroshi Tanigawa ,  Hiroshi Kondou ,  Tsuneo Tohyama ,  Isao Fukai

IPC分类号： G06G7/18 ,  H03H11/04 ,  H03K5/08

CPC分类号： H03K5/088

摘要： A variable time-constant differentiator comprises an operational amplifier t which a signal is inputted through a capacitor; and a variable transconductance amplifier connected between an input terminal to which a signal is applied and an 5 output terminal.

摘要翻译： 可变时间微分器包括通过电容器输入信号的运算放大器t; 以及连接在施加信号的输入端子与5输出端子之间的可变跨导放大器。