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1. 发明申请

WO1995013652A1 APPARATUS AND METHOD FOR FREQUENCY COMPENSATING AN OPERATIONAL AMPLIFIER 审中-公开
标题翻译：用于频率补偿运算放大器的装置和方法
公开(公告)号：WO1995013652A1
公开(公告)日：1995-05-18
申请号：PCT/US1994011468
申请日：1994-10-11
申请人： MOTOROLA INC.
发明人： MOTOROLA INC. , GILLIG, Steven, Frederick
IPC分类号： H03F01/34
CPC分类号： H03F1/083
摘要： A transimpedance circuit (201), and method therefor, frequency compensates an operational amplifier. The transimpedance circuit (201) has an input terminal (205) coupled to receive an amplified signal (205) and an output terminal (206) operative to produce a buffered amplified signal. The input terminal (205) of the transimpedance circuit (201) presents a resistive input impedance to the amplified signal at a frequency substantially near an open loop unity gain frequency of the operational amplifier (200). The amplified signal is buffered from a complex impedance of an input terminal (206) of an output driver (103). The present invention advantageously provides wide bandwidth and stable operation with loads having low complex impedance.
摘要翻译：跨阻抗电路（201）及其方法对运算放大器进行频率补偿。跨阻抗电路（201）具有耦合以接收放大信号（205）的输入端（205）和用于产生缓冲放大信号的输出端（206）。跨导电路（201）的输入端（205）以基本上接近运算放大器（200）的开环单位增益频率的频率向放大信号呈现电阻输入阻抗。放大的信号从输出驱动器（103）的输入端（206）的复阻抗缓冲。本发明有利地提供具有低复数阻抗的负载的宽带宽和稳定的操作。

2. 发明申请

WO1993016524A1 AMPLIFIER CIRCUIT 审中-公开
标题翻译：放大器电路
公开(公告)号：WO1993016524A1
公开(公告)日：1993-08-19
申请号：PCT/GB1993000280
申请日：1993-02-11
申请人： AUDIO SOLUTIONS LIMITED , PORTER, Barry, Elliot
发明人： AUDIO SOLUTIONS LIMITED
IPC分类号： H03F01/34
CPC分类号： H03F1/34
摘要： An amplifier circuit comprises a main amplifier (12) having an input (16) for receiving an input signal and an output (18) for delivering an output signal, a first feedback circuit (14) and a second feedback circuit (R1, R2). The first feedback circuit (14) comprises an attenuator (R3, R4) which attenuates the output signal to the level of the input signal, a phase correction circuit (R8, C2, R9, C3) which compensates the input signal for phase changes occurring in the main amplifier (12) and a difference amplifier (22) which subtracts the attenuated output signal from the phase corrected input signal. The output of the difference amplifier (22) is amplified in an operational amplifier (23) and supplied to the main amplifier (12) as a negative feedback signal. In operation, the first feedback circuit (14) greatly reduces the level of distortion components in the output signal.

3. 发明申请

WO1998000910A1 CIRCUIT ARRANGEMENT COMPRISING A FEEDBACK LOOP 审中-公开
标题翻译：包含反馈环的电路布置
公开(公告)号：WO1998000910A1
公开(公告)日：1998-01-08
申请号：PCT/IB1997000737
申请日：1997-06-18
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS PATENTVERWALTUNG GMBH , PHILIPS NORDEN AB , SPARKS, Geoffrey, Sidney
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS PATENTVERWALTUNG GMBH , PHILIPS NORDEN AB
IPC分类号： H03F01/34
CPC分类号： H03G3/3042 , H03F1/34 , H03F2200/207 , H03F2200/336
摘要： A description is given of a circuit arrangement comprising a feedback loop, which arrangement has a forward path for transmitting a result signal, a feedback path for deriving a feedback signal from the output signal of the forward path and a first recombining stage for recombining an input signal with the feedback signal to generate the result signal. A possibility of measuring the loop gain of the open feedback loop is then obtained by a measuring circuit for producing a measuring signal, which signal is derived from the result signal and the feedback signal by linear combination.
摘要翻译：给出了包括反馈回路的电路布置的描述，该布置具有用于传送结果信号的前向路径，用于从正向路径的输出信号导出反馈信号的反馈路径和用于重新组合输入的第一重组级信号与反馈信号产生结果信号。然后，通过用于产生测量信号的测量电路获得测量开路反馈环路的环路增益的可能性，该测量信号通过线性组合从结果信号和反馈信号导出。

4. 发明申请

WO1994011946A1 TWO-PORT WIDEBAND BIPOLAR TRANSISTOR AMPLIFIERS 审中-公开
标题翻译：双端口宽带双极晶体管放大器
公开(公告)号：WO1994011946A1
公开(公告)日：1994-05-26
申请号：PCT/CA1992000490
申请日：1992-11-16
申请人： TARALP, Güner
IPC分类号： H03F01/34
CPC分类号： H03F1/48 , H03F1/347
摘要： A wideband amplifier comprises a dual-emitter bipolar transistor arrangement (14; 70, 72; 70, 74, 76) with coaxial transformers (40, 42; 44, 46), each having a high turns ratio and tight coupling between a first toroidal winding (40; 44) on an annular ferrite core and a second, single-turn, winding (42; 46) constituted by a metal container of the transformer. The second windings are coupled between respective emitters and signal ground, and the first windings are connected between the transistor base and collector, respectively, and signal ground. An input signal is supplied to the base, and an output signal is derived from the collector. The dual-emitter bipolar transistor, which has four terminals, is thereby transformed into a two-port (input port and output port) device which facilitates impedance matching, provides a linear and constant gain over a large bandwidth, provides high isolation of the input from the output, and provides low noise at the input and a high level at the output.
摘要翻译：宽带放大器包括具有同轴变压器（40,42; 44,46）的双发射极双极晶体管布置（14; 70,72; 70,74,76），每个具有高匝数比，并且第一环形环形铁氧体磁心上的绕组（40; 44）和由变压器的金属容器构成的第二单匝绕组（42; 46）。第二绕组耦合在相应的发射极和信号地之间，第一绕组分别连接在晶体管基极和集电极之间，并且信号接地。输入信号被提供给基极，并且从收集器导出输出信号。具有四个端子的双发射极双极晶体管因此被转换成便于阻抗匹配的双端口（输入端口和输出端口）器件，在大带宽上提供线性和恒定的增益，从而提供输入的高隔离度并且在输出端提供低噪声，在输出端提供高电平。

5. 发明申请

WO1988008224A1 OUTPUT AMPLIFIER 审中-公开
标题翻译：输出放大器
公开(公告)号：WO1988008224A1
公开(公告)日：1988-10-20
申请号：PCT/US1988001105
申请日：1988-04-05
申请人： CROSS TECHNOLOGY, INC.
发明人： CROSS TECHNOLOGY, INC. , JOHNSON, William, A.
IPC分类号： H03F01/34
CPC分类号： H03F3/183 , H03F1/34 , H04R25/00
摘要： An amplifier system providing the voltage feedback (27, 44, 45) which can be supplemented with current feedback (27, 46, 47, 48) without limiting the voltage excursion range at the amplifier system output (44).

6. 发明申请

WO1996019865A3 AN AMPLIFYING CIRCUIT 审中-公开
公开(公告)号：WO1996019865A3
公开(公告)日：1996-06-27
申请号：PCT/IB1995001089
申请日：1995-12-04
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , HARKIN, Gerard, Francis
IPC分类号： H03F01/34

7. 发明申请

WO1993003542A1 AMPLIFIER 审中-公开
标题翻译：放大器
公开(公告)号：WO1993003542A1
公开(公告)日：1993-02-18
申请号：PCT/GB1992001418
申请日：1992-07-31
申请人： WIVENHOE TECHNOLOGY LIMITED , HAWKSFORD, Malcolm, Omar, John
发明人： WIVENHOE TECHNOLOGY LIMITED
IPC分类号： H03F01/34
CPC分类号： H03F1/347
摘要： An amplifier having an integrator with a forward path of gain A and arranged to have simultaneously voltage and differential current derived feedback. The feedback signal thus contains a component dependent upon a voltage in the forward path forward of the integrator and a component dependent on the first derivative of a current in the forward path forward of the integrator.
摘要翻译：具有积分器的放大器，其具有增益A的正向通路并被布置成具有同时的电压和差动电流导出的反馈。因此，反馈信号包含取决于积分器正向前进中的电压的分量，以及取决于积分器前进方向前进中的电流的一阶导数的分量。

8. 发明申请

WO1980002625A1 GENERATOR OF ELECTRIC OSCILLATIONS 审中-公开
标题翻译：电动振荡发电机
公开(公告)号：WO1980002625A1
公开(公告)日：1980-11-27
申请号：PCT/SU1980000077
申请日：1980-05-21
申请人： SHAPIRO L , PASS M , OGARKOVA N , LESISH Y , FILATOV O , LEBEDEV Y
IPC分类号： H03F01/34
CPC分类号： H03F3/24 , H03C1/02 , H03F1/36
摘要： A generator of electric oscillations comprising an exciter (1) and an output amplifier stage (2) based on a electron tube (3) with common-grid connection. A section (7a) of the input-circuit of the electron tube (3) is connected to the output of the exciter (1), executed as a current source, through a device (11) connected in series with the said section and intended to form a compensating tension which is in antiphase with the tension in the said section (7a) of the input circuit.

9. 发明申请

WO1996030998A1 AMPLIFYING CIRCUIT 审中-公开
标题翻译：放大电路
公开(公告)号：WO1996030998A1
公开(公告)日：1996-10-03
申请号：PCT/AU1996000172
申请日：1996-03-27
申请人： JAMES, Anthony, Michael , HILDEBRANDT, William, James
IPC分类号： H03F01/34
CPC分类号： H03F3/347 , H03F1/083 , H03F2200/261
摘要： An amplifier is provided for audio or instrumentation applications which exhibits radically improved performance over existing amplifiers of comparable cost. In a preferred embodiment, the amplifier comprises two operational amplifiers (A1, A2) connected in cascade, where feedback elements (Cf2, Rf2) are connected across the second op amp (A2) to cause an intermediate voltage signal (Z) to be substantially advanced in phase. In this embodiment, a capacitor (Cf1) is also connected across the first op amp (A1), and an outer DC loop is provided with damping means (Cf3) to reduce the closed loop gain at high frequencies, stabilising the combination. The composite amplifier has performance far exceeding a conventional stand-alone op amp and is very cheap to construct.
摘要翻译：为音频或仪器应用提供放大器，可以显着提高性能，超过现有放大器的可比性。在优选实施例中，放大器包括串联连接的两个运算放大器（A1，A2），其中反馈元件（Cf2，Rf2）跨越第二运算放大器（A2）连接，以使中间电压信号（Z）基本上进阶阶段在本实施例中，电容器（Cf1）也连接在第一运算放大器（A1）两端，并且外部DC环路设置有阻尼装置（Cf3），以降低高频下的闭环增益，从而稳定组合。复合放大器的性能远远超过传统的独立运算放大器，并且构造非常便宜。

10. 发明申请

WO1995006355A1 REGENERATIVE AMPLIFIER CIRCUIT 审中-公开
标题翻译：具有反馈放大电路
公开(公告)号：WO1995006355A1
公开(公告)日：1995-03-02
申请号：PCT/EP1994002817
申请日：1994-08-25
申请人： GOTTWALD, Alfons
发明人： SCHURACK, Eduard
IPC分类号： H03F01/34
CPC分类号： H03F1/342 , H03F1/301
摘要： A regenerative amplifier circuit should reduce the effects of the inherent, thermal power loss-dependent feedback of a transistor of the circuit. A conventional linear negative feedback can only reduce such effects to a limited extent, and at the same time reduces the linear amplification. A positive feedback according to DE-PS 33 35 170 is also insufficient because it does not correctly take into account the properties of the thermal power-dependent inherent feedback. The object of the invention is not only to reduce the effects of said feedback, but also to eliminate them. For that purpose, an outer positive feedback component that simulates the inherent feedback is connected to the transistor in the circuit whose inherent feedback may be characterised by power loss shaping, power shaping LF, and a low-pass property based on thermal impedance Zth. This outer positive feedback component is connected to the transistor in such a way that the outer positive feedback cancels the inherent feedback.
摘要翻译：本发明涉及具有反馈的放大器，应该是在电路中的晶体管的热功率损失依赖内部反馈的影响被降低。传统的线性反馈可以减少只有这样的效果，并在同一时间也降低了线性扩增。另外，根据DE-PS 33 35 170中的反馈是不够的，因为它们没有考虑到热性能化内部反馈的性质正常。本发明是基于减少这种反应不仅，但废除的效果的对象上。根据该目的是通过可在晶体管中的电路的特征在于实现了本发明，由电力损失的形成内反馈，以及通过低通特性，该特性是由于热阻抗第Z成形LF电源，外Rückkoppelkompenente被接通时，包含内部反馈的副本。此外反馈组件上，所述外反馈抵消内部反应的晶体管进行切换。

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