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公开(公告)号：US20080204171A1
公开(公告)日：2008-08-28
申请号：US11680323
申请日：2007-02-28
IPC分类号： H03H11/02
CPC分类号： H03H11/48 , H03F3/45183 , H03H11/245
摘要： Methods and apparatus are provided for programmable active inductance. The disclosed active inductor devices provide a tunable bandwidth with improved linearity. The disclosed active inductors have a variable frequency response corresponding to a variable inductance of the active inductor. The active inductor comprises a variable resistive circuit having an effective resistance, wherein the variable resistive circuit is comprised of at least one resistor that can be selectively bypassed in the variable resistive circuit to vary the effective resistive. The active inductor has an inductance that can be varied by varying the effective resistance.
摘要翻译： 为可编程有源电感提供方法和装置。 所公开的有源电感器件提供具有改进的线性度的可调节带宽。 所公开的有源电感器具有对应于有源电感器的可变电感的可变频率响应。 有源电感器包括具有有效电阻的可变电阻电路，其中可变电阻电路包括至少一个可在可变电阻电路中选择性旁路的电阻器，以改变有效电阻。 有源电感器具有可以通过改变有效电阻而变化的电感。
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公开(公告)号：US5966297A
公开(公告)日：1999-10-12
申请号：US90235
申请日：1998-06-04
申请人： Atsushi Minegishi
发明人： Atsushi Minegishi
IPC分类号： G01R19/00 , H03D7/14 , H03F3/387 , H03G1/00 , H03H11/02 , H02M3/335 , H02M3/18 , H03F3/38 , H03F17/00
CPC分类号： H03G1/0023 , H03D7/1433 , H03D7/1458 , H03F3/387 , H03D2200/0023
摘要： A large bandwidth analog isolation circuit is disclosed. Isolation transformers (11, 12) isolate the nonfloating side on the right hand from the floating side on the left hand. The input signal (1a, 1b) and a high frequency sinusoidal signal (3a, 3b) via a transformer (16) from an oscillator (18) are applied to a multiplier (20). The floating multiplied signal is supplied to a nonfloating multiplier (60). Thereby, the signal (6a, 6b) is multiplied by the high frequency sinusoidal signal (8a, 8b). The nonfloating multiplied signal (9a, 9b) is obtainable and is filtered (67, 68) to send out the output signal (2a, 2b) reproduced from the input signal (1a, 1b). Thus, replica of the input signal is obtained in the nonfloating side.
摘要翻译： 公开了一种大带宽模拟隔离电路。 隔离变压器（11,12）将右侧的非浮动侧与左侧的浮动侧隔离开。 经由来自振荡器（18）的变压器（16）的输入信号（1a，1b）和高频正弦信号（3a，3b）被施加到乘法器（20）。 浮动相乘信号被提供给非浮动乘法器（60）。 由此，信号（6a，6b）乘以高频正弦信号（8a，8b）。 可以获得非浮动倍增信号（9a，9b）并对其进行滤波（67,68）以发出从输入信号（1a，1b）再现的输出信号（2a，2b）。 因此，在非浮动侧获得输入信号的副本。
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公开(公告)号：US5731740A
公开(公告)日：1998-03-24
申请号：US650568
申请日：1996-05-20
CPC分类号： H03H11/32
摘要： In an amplifier module circuit, an input transformer (TI) transforms an input signal (ISU) into a transformed input signal (ISB), which is supplied to a pair of amplifiers (AMPA, AMPB). In addition to windings (W1, W2) for input signal transformation, the core (CO) of the transformer (TI) is provided with an auxiliary winding (W3) for biasing the pair of amplifiers (AMPA, AMPB). A DC bias voltage (VB) is supplied to a tap (XT) on the auxiliary winding (W3) whose ends are DC coupled to the input transistors (QA, QB) of the pair of amplifiers (AMPA, AMPB).
摘要翻译： 在放大器模块电路中，输入变压器（TI）将输入信号（ISU）变换成被提供给一对放大器（AMPA，AMPB）的变换输入信号（ISB）。 除了用于输入信号变换的绕组（W1，W2）之外，变压器（TI）的磁芯（CO）还具有用于偏置一对放大器（AMPA，AMPB）的辅助绕组（W3）。 直流偏置电压（VB）被提供给辅助绕组（W3）上的抽头（XT），辅助绕组的端部直流耦合到该对放大器（AMPA，AMPB）的输入晶体管（QA，QB）。
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24.发明授权
公开(公告)号：US5594633A
公开(公告)日：1997-01-14
申请号：US514930
申请日：1995-08-14
申请人： Hiroshi Asazawa
发明人： Hiroshi Asazawa
CPC分类号： H03G1/0023 , H03D7/1408 , H03D7/1433 , H03D7/1458 , H03D7/1491 , H03F3/45071 , H03D2200/0033 , H03D2200/0084 , H03F2203/45098 , H03F2203/45476
摘要： A voltage-to-current converting circuit configured to convert an input voltage signal into a pair of complementary current signals by use of a current mirror, comprises a transistor 4 connected in the form of a diode and connected in series with a constant current source 21, a transistor 3 having a collector connector to a collector of the transistor 4, a transistor 2 having a base connected to a base of the transistor 3 so as to form a current mirror in cooperation with the transistor 3, the base of the transistor 2 being connected to receive an input voltage signal Vin, a bias circuit 5 for biasing the base of the transistors 3 and 2, and a transistor 1 having a base connected to a base of the transistor 4 so as to form a current mirror in cooperation with the transistor 4. The input voltage Vin is converted into a collector current I1 of the transistor 1 and a collector current I2 of the transistor 2. Thus, the voltage-to-current converting circuit is composed of only NPN transistors, so that a manufacturing process is simplified. In addition, since no emitter follower is included, a low voltage operation can be realized. This circuit can be applied to a multiplier, frequency doubler, a frequency mixer, etc.
摘要翻译： 配置为通过使用电流镜将输入电压信号转换为一对互补电流信号的电压 - 电流转换电路包括以二极管形式连接并与恒流源21串联连接的晶体管4 晶体管3具有到晶体管4的集电极的集电极连接器，晶体管2具有与晶体管3的基极连接的基极，以便与晶体管3配合形成电流镜，晶体管2的基极 连接以接收输入电压信号Vin，用于偏置晶体管3和2的基极的偏置电路5以及具有连接到晶体管4的基极的基极的晶体管1，以与 晶体管4.输入电压Vin被转换为晶体管1的集电极电流I1和晶体管2的集电极电流I2。因此，电压 - 电流转换电路仅由NPN晶体管 从而简化了制造过程。 此外，由于不包括射极跟随器，因此可以实现低电压操作。 该电路可应用于倍频器，倍频器，混频器等
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公开(公告)号：US4801901A
公开(公告)日：1989-01-31
申请号：US25594
申请日：1987-03-13
申请人： Yalcin Ayasli
发明人： Yalcin Ayasli
摘要： A non-reciprocal phase shifter including a transmission medium connected between first and second terminals and having a predetermined phase shift which is the same in each direction and an amplifier circuit connected between the first and second terminals for introducing its inherent phase shift in one direction and a phase shift in excess of its inherent phase shift in the other direction for establishing a non-reciprocal phase shift; and a circulator made from such a phase shifter.
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26.发明授权Electronic impedance circuit including a compensation arrangement for d.c. offset 失效电子阻抗电路包括直流补偿装置。 抵消
公开(公告)号：US4520282A
公开(公告)日：1985-05-28
申请号：US411997
申请日：1982-08-27
申请人： Kazuo Watanabe , Yuichi Ohkubo , Akira Haeno , Fumihiko Yokogawa
发明人： Kazuo Watanabe , Yuichi Ohkubo , Akira Haeno , Fumihiko Yokogawa
CPC分类号： H03F3/45479 , H03H11/46
摘要： An electronic impedance circuit is constructed of a voltage-current converter and a variable gain current amplifier. The voltage-current converter includes first and second transistors of the PNP-type differentially connected. The variable gain current amplifier includes third and fourth transistors of the NPN-type differentially connected, and fifth and sixth transistors of the PNP-type as load means. The bases of the third and fourth transistors are respectively driven by collector signals of the first and second transistors, and a collector signal of the third transistor is fed back to the base of the second transistor. In order to reduce a d.c. offset attributed to a current flowing between the base of the second transistor and the collector of the third transistor, a compensation circuit is connected to the variable gain amplifier. This compensation circuit can provide compensation by producing a compensation current for cancelling the current between the base of the second transistor and the collector of the third transistor.
摘要翻译： 电子阻抗电路由电压 - 电流转换器和可变增益电流放大器构成。 电压 - 电流转换器包括PNP型差分连接的第一和第二晶体管。 可变增益电流放大器包括NPN型差分连接的第三和第四晶体管，以及PNP型作为负载装置的第五和第六晶体管。 第三和第四晶体管的基极分别由第一和第二晶体管的集电极信号驱动，第三晶体管的集电极信号被反馈到第二晶体管的基极。 为了减少直流 归因于在第二晶体管的基极和第三晶体管的集电极之间流动的电流的补偿，补偿电路连接到可变增益放大器。 该补偿电路可以通过产生用于消除第二晶体管的基极和第三晶体管的集电极之间的电流的补偿电流来提供补偿。
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公开(公告)号：US4450417A
公开(公告)日：1984-05-22
申请号：US334859
申请日：1981-12-28
申请人： Andrew F. Folkmann
发明人： Andrew F. Folkmann
CPC分类号： H03H11/367 , H03H11/04
摘要： A feed forward circuit that can be used as an isolator or filter includes a first and a second directional coupler that, depending on the application, either splits an applied signal into two paths or combines the two paths to obtain an output signal. One path includes an electronically tunable band reject filter (or notch filter) which may be bypassed by a switch in the isolator application, and an inverting amplifier. The second path includes a delay line that compensates for the time delay of the signal in the first path due to the time delay of the inverting amplifier and electronically tunable band reject filter.
摘要翻译： 可以用作隔离器或滤波器的前馈电路包括第一和第二定向耦合器，其根据应用将施加的信号分解成两个路径或组合两个路径以获得输出信号。 一个路径包括可以由隔离器应用中的开关旁路的电子可调谐带阻滤波器（或陷波滤波器）和反相放大器。 第二路径包括延迟线，该延迟线由于反相放大器和电子可调谐带阻滤波器的时间延迟而补偿第一路径中的信号的时间延迟。
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公开(公告)号：US4310803A
公开(公告)日：1982-01-12
申请号：US68004
申请日：1979-08-20
申请人： Hiroshi Kurihara , Sadao Takenaka
发明人： Hiroshi Kurihara , Sadao Takenaka
IPC分类号： H03H7/01 , H03H19/00 , H04L27/227 , H03H11/02
CPC分类号： H04L27/2276 , H03H19/00 , H03H7/01
摘要： An improved bandpass filter circuit for selecting a relatively narrow band portion of an input sinusoidal signal. The improved bandpass filter circuit produces an output signal whose phase deviation from the input signal is substantially constant for small variations in the frequency of the input signal. The improved bandpass filter circuit in accordance with the present invention does not use feedback control in its operation and therefore is free from the inherent delay time of a tracking type bandpass filter utilizing feedback control in handling transitory input signals.
摘要翻译： 一种用于选择输入正弦信号的相对窄带部分的改进的带通滤波器电路。 改进的带通滤波器电路产生输出信号，其输入信号的相位偏移对于输入信号的频率的小变化基本上是恒定的。 根据本发明的改进的带通滤波器电路在其操作中不使用反馈控制，因此在处理暂时输入信号中利用反馈控制的跟踪型带通滤波器的固有延迟时间没有。
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公开(公告)号：US4054801A
公开(公告)日：1977-10-18
申请号：US580251
申请日：1975-05-23
申请人： Marcel Breval , Marc Prudhomme
发明人： Marcel Breval , Marc Prudhomme
IPC分类号： H03H1/00 , G02B27/00 , H01L31/12 , H01L31/167 , H03H11/02
CPC分类号： H01L31/167
摘要： A photo-electric coupler, or isolator, wherein a semiconductor light emitter and a semiconductor photodetector are enclosed in a light transmissive body having a surface covering of light reflective material for reflecting toward the photodetector, incident light from the emitter. The emitter and detector can be disposed face-to-face or side-by-side. The reflective cover can provide an external protective covering for the device or a conventional housing can be used.
摘要翻译： 一种光电耦合器或隔离器，其中半导体光发射器和半导体光电检测器被封装在具有光反射材料的表面覆盖物的光透射体中，用于向光电检测器反射来自发射器的入射光。 发射器和检测器可以面对面或并排布置。 反射罩可以为装置提供外部保护罩，或者可以使用传统的外壳。
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公开(公告)号：US3952205A
公开(公告)日：1976-04-20
申请号：US526872
申请日：1974-11-25
CPC分类号： H04B10/802
摘要： A light emitting diode is driven by an input signal and electromagnetically coupled to a photodiode. The photodiode is connected to a high impedance load across which is obtained a signal linearly related to but electrically isolated from the input signal.
摘要翻译： 发光二极管由输入信号驱动并与光电二极管电磁耦合。 光电二极管被连接到高阻抗负载，在该高阻抗负载上获得与输入信号线性相关但与电绝缘的信号。
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