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31. 发明授权

US5825265A Grounded inductance circuit using a gyrator circuit 失效
标题翻译：使用回转电路的接地电感电路
公开(公告)号：US5825265A
公开(公告)日：1998-10-20
申请号：US566022
申请日：1995-12-01
申请人： Tomohiro Fujii
发明人： Tomohiro Fujii
IPC分类号： H03H11/42 , H03H11/50
CPC分类号： H03H11/50 , H03H11/42
摘要： First and second transconductance amplifiers OTA 1, OTA 2, each having two input terminals, and two output terminals are constructed in such a manner that a first input terminal of the OTA 1 is connected with a second output terminal of the OTA 2, a first output terminal of the OTA 1 and a first input terminal of the OTA 2 are connected to a capacitor which is grounded at one end, and a second input terminal and a second output terminal of the OTA 1 and a second input terminal and a first output terminal of the OTA 2 are AC-grounded.
摘要翻译：具有两个输入端的第一和第二跨导放大器OTA 1，OTA 2和两个输出端被构造成使得OTA 1的第一输入端与OTA 2的第二输出端相连， OTA 1的输出端子和OTA 2的第一输入端子连接到在一端接地的电容器，以及OTA 1的第二输入端子和第二输出端子以及第一输出端子 OTA 2的端子是交流接地的。

32. 发明授权

US5635884A Grounded inductance circuit using gyrator circuit 失效
标题翻译：使用回转电路的接地电感电路
公开(公告)号：US5635884A
公开(公告)日：1997-06-03
申请号：US660175
申请日：1996-06-03
申请人： Tomohiro Fujii
发明人： Tomohiro Fujii
IPC分类号： H03F1/32 , H03F3/45 , H03H11/08 , H03H11/50
CPC分类号： H03H11/50 , H03F1/3211 , H03F3/45085 , H03F2203/45371 , H03F2203/45508 , H03F2203/45648 , H03F2203/45732
摘要： The grounded inductance circuit utilizing a gyrator circuit includes a first operational transconductance amplifier, a second operational transconductance amplifier and a first capacitor. A first output terminal of the first operational transconductance amplifier is connected to a first input terminal of the second operational transconductance amplifier, and a second output terminal of the first operational transconductance amplifier is connected to a second input terminal of the second operational transconductance amplifier. A first output terminal of the second operational transconductance amplifier is connected to a second input terminal of the first operational transconductance amplifier and a second output terminal of the second operational transconductance amplifier is connected to a first input terminal of the first operational transconductance amplifier. The second input terminal of the first operational transconductance amplifier and the first input terminal of the second operational transconductance amplifier are connected to each other and the junction of the two input terminals is applied with a predetermined dc bias voltage with respect to the ground potential. The capacitor is connected between the junction and the second input terminal of the second operational transconductance amplifier. An ac signal is applied between the first input terminal of the first operational transconductance amplifier and the ground potential.
摘要翻译：利用回转器电路的接地电感电路包括第一运算跨导放大器，第二运算跨导放大器和第一电容器。第一运算跨导放大器的第一输出端连接到第二运算跨导放大器的第一输入端，第一运算跨导放大器的第二输出端连接到第二运算跨导放大器的第二输入端。第二运算跨导放大器的第一输出端连接到第一运算跨导放大器的第二输入端，第二运算跨导放大器的第二输出端连接到第一运算跨导放大器的第一输入端。第一运算跨导放大器的第二输入端和第二运算跨导放大器的第一输入端彼此连接，并且相对于地电位施加预定的直流偏置电压的两个输入端的结。电容器连接在第二运算跨导放大器的结和第二输入端之间。交流信号施加在第一运算跨导放大器的第一输入端和地电位之间。

33. 发明授权

US4812785A Gyrator circuit simulating an inductance and use thereof as a filter or oscillator 失效
标题翻译：模拟电感的旋转电路及其用作滤波器或振荡器
公开(公告)号：US4812785A
公开(公告)日：1989-03-14
申请号：US077572
申请日：1987-07-24
申请人： Vlad Pauker
发明人： Vlad Pauker
IPC分类号： H03H11/50 , H03H11/08 , H03H11/42 , H03B5/24
CPC分类号： H03H11/50 , H03H11/08 , H03H11/42
摘要： A gyrator circuit usable in a resonant filter circuit comprises a first and a second transconductance amplifier circuit, A and B, respectively, having opposite conductances, which amplifiers are arranged in parallel between a first terminal a and a second terminal b and comprise a first capacitance C.sub.1 arranged between said first terminal a and an earth terminal m, which gyrator circuit simulates an inductance L.sub.g arranged between said second terminal b and said earth terminal m and comprises means for controlling the quality factor Q of said inductance, characterized in that the first transconductance amplifier circuit A comprises two series-connected inverting amplifier stages P.sub.1 and P.sub.2, in that the second transconductance amplifier circuit B comprises an inverting amplifier stage P.sub.3, and in that the means for controlling the quality factor Q comprise a first means P.sub.5 for influencing the output conductance q.sub.2 of the gyrator and a second means P.sub.6 for influencing the phase shift between the output current and the control voltage of the gyrator.
摘要翻译：可用于谐振滤波器电路的回转器电路包括分别具有相反电导的第一和第二跨导放大器电路A和B，这些放大器并联布置在第一端子a和第二端子b之间，并且包括第一电容 C1布置在所述第一端子a和接地端子m之间，所述回转器电路模拟布置在所述第二端子b和所述接地端子m之间的电感Lg，并且包括用于控制所述电感的品质因数Q的装置，其特征在于，所述第一跨导放大器电路A包括两个串联连接的反相放大器级P1和P2，其中第二跨导放大器电路B包括反相放大器级P3，并且用于控制质量因数Q的装置包括用于影响输出的第一装置P5 旋转器的电导q2和用于影响相位偏移的第二装置P6 回转器的输出电流和控制电压。

34. 发明授权

US4290036A Filter circuit arrangement 失效
标题翻译：滤波电路布置
公开(公告)号：US4290036A
公开(公告)日：1981-09-15
申请号：US144729
申请日：1980-04-28
申请人： Kenneth W. Moulding , Gordon A. Wilson
发明人： Kenneth W. Moulding , Gordon A. Wilson
IPC分类号： H03H11/10 , H03H11/04 , H03H11/08 , H03H11/50
CPC分类号： H03H11/08 , H03H11/04 , H03H11/50
摘要： In a filter circuit a reactance is simulated by a voltage amplifier the input of which is connected across a reactive element and the output of which is connected in series with that element, thereby enabling, for example, the series arrangement of a pair of inductances to be simulated by a single capacitively-loaded gyrator (15, 16, 7) and a voltage amplifier (15, 8). The circuit shown simulates a series-resonant circuit fed via a series inductor and is suitable for use as a sound trap in a television receiver. A current proportional to the voltage across the unloaded port (8) of the gyrator (15, 16) generates a corresponding voltage across a load resistor (12) and this voltage is injected effectively in series with any voltage present across a pair of input terminals (1, 2) by means of a differential voltage amplifier (13).
摘要翻译：在滤波器电路中，电抗器由其输入端连接在电抗元件上并且其输出与该元件串联连接的电压放大器来模拟，从而使例如一对电感器由单电容负载转子（15,16,7）和电压放大器（15,8）进行模拟。所示的电路模拟了串联电感馈电的串联谐振电路，适用于电视接收机中的陷阱。与回转器（15,16）的无负载端口（8）上的电压成比例的电流在负载电阻器（12）两端产生相应的电压，并且该电压被有效地注入到跨越一对输入端子的任何电压（1,2）通过差分电压放大器（13）。

35. 发明公开

EP1061647A3 Ladder filter, analog equalizer and signal readout system 审中-公开
标题翻译：分波器，模拟均衡器和信号读出系统
公开(公告)号：EP1061647A3
公开(公告)日：2007-11-21
申请号：EP00112692.9
申请日：2000-06-15
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD
发明人： Dosho, Shiro , Morie, Takashi
IPC分类号： H03H11/04
CPC分类号： G11B20/10009 , H03H11/04 , H03H11/486 , H03H11/50
摘要： A ladder filter includes multiple inductor sections, each including voltage-controlled current sources and capacitors. A second signal input terminal is provided for the filter separately from an ordinary signal input terminal and a signal, which has been input through the second terminal, is supplied to one of the voltage-controlled current sources by way of a gain calculator. By adjusting the gain obtained by the gain calculator to an appropriate value, the ladder filter can make the numerator of its transfer function freely definable.

36. 发明授权

EP0988698B1 GYRATOR 有权
标题翻译：回转
公开(公告)号：EP0988698B1
公开(公告)日：2005-01-12
申请号：EP99910056.3
申请日：1999-03-25
申请人： Nortel Networks Limited
发明人： BROWN, Anthony, Kevin, Dale
IPC分类号： H03H11/50 , H03B5/20
CPC分类号： H03B5/20 , H03H11/50

37. 发明授权

EP0716506B1 Grounded inductance circuit using a gyrator circuit 失效
标题翻译：使用回转器接地电感电路
公开(公告)号：EP0716506B1
公开(公告)日：2002-03-20
申请号：EP95119026.3
申请日：1995-12-04
申请人： NEC CORPORATION
发明人： Fujii, Tomohiro, c/o NEC Corp.
IPC分类号： H03H11/50 , H03H11/42
CPC分类号： H03H11/50 , H03H11/42

38. 发明授权

EP0686317B1 OPTO-ELECTRONIC TRANSCONDUCTORS 失效
标题翻译：光电跨导
公开(公告)号：EP0686317B1
公开(公告)日：1996-12-18
申请号：EP94907640.0
申请日：1994-02-25
申请人： IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY & MEDICINE
发明人： TOUMAZOU, Christofer , VANISRI, Tongtod
IPC分类号： H03H11/48 , H03H11/14 , H03H11/04
CPC分类号： H03H11/14 , H03H11/04 , H03H11/486 , H03H11/50
摘要： A transconductance device particularly suitable for use as a high frequency active filter, having an input stage including at least one field effect transistor (M1) arranged to drive a laser diode (LD1), and an output stage comprising at least one photodiode (PD1) optically coupled to the laser diode. The output stage is preferably provided with a high impedance bias current supply circuit. In an alternative arrangement particularly useful as an operational amplifier, a differential input stage includes a pair of laser diodes LD1 and LD2 optically coupled to respective photodiodes PD1 and PD2 connected in series, the output being taken from the junction of the two photodiodes.

39. 发明公开

EP1471639A1 Active inductor 审中-公开
标题翻译： AktiveInduktivität
公开(公告)号：EP1471639A1
公开(公告)日：2004-10-27
申请号：EP03291034.1
申请日：2003-04-25
申请人： ALCATEL
发明人： Redoute, Jean-Michel Vladimir , Sevenhans, Joannes Mathilda Josephus
IPC分类号： H03H11/50
CPC分类号： H03H11/50
摘要： An active inductor circuit (L) includes first (T1) and second (T2) terminals for coupling to respective external terminals (Hi,Lo), said first and second terminals being coupled to a first transconductance circuit (gm1), a second transconductance circuit (gm2) and a feedback circuit (fb) included in said active inductor circuit. An output terminal (OUT1) of said first transconductance circuit (gm1) is coupled to an input terminal of said second transconductance circuit (gm2), an output terminal (OUT2) of said second transconductance circuit (gm2) is coupled to an input terminal (IN1) of said first transconductance circuit (gm1) via said feedback circuit (fb) , and said active inductor circuit further including a capacitor (C1) coupled between said output terminal (OUT) of said first transconductance circuit (gm1) and said second terminal (T2).
摘要翻译：耦合到跨导电路的电感器端子（T1，T2）连接到相应的外部端子（Hi，Lo）。一个跨导电路的输出端（OUT2）通过反馈电路连接到其他跨导电路的输入端。电容器（C1）耦合在其他跨导电路的输出端（OUT1）和电感端（T2）之间。

40. 发明公开

EP0988698A1 GYRATOR 有权
标题翻译：回转
公开(公告)号：EP0988698A1
公开(公告)日：2000-03-29
申请号：EP99910056.3
申请日：1999-03-25
申请人： Nortel Networks Corporation
发明人： BROWN, Anthony, Kevin, Dale
IPC分类号： H03H11/50 , H03B5/20
CPC分类号： H03B5/20 , H03H11/50
摘要： A gyrator includes shunt or feedback nodal capacitors and shunt lossy inductors without shunt load resistors. The effective nodal capacitance is reduced by the introduction of the shunt lossy inductors. The inductors act to discriminate against injected power supply noise, resulting in improved oscillator phase noise. The inductors produce less dc voltage drop than the resistive load, so that larger linear oscillation is obtained with improved oscillator phase noise. The gyrator includes an automatic gain control circuit and a tuning control circuit which are separate from each other and fast and slow acting control loops which are augmented with each other.

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