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21. 发明授权

US5500625A Controlled current output stage amplifier circuit and method 失效
标题翻译：控制电流输出级放大器电路及方法
公开(公告)号：US5500625A
公开(公告)日：1996-03-19
申请号：US348662
申请日：1994-12-01
申请人： Gabriel A. Rincon , Nicolas Salamina , Marco Corsi
发明人： Gabriel A. Rincon , Nicolas Salamina , Marco Corsi
IPC分类号： H03F3/30 , H03F3/343 , H03F3/26
CPC分类号： H03F3/3088 , H03F3/3089
摘要： An amplifier circuit (10) is provided. The amplifier (10) includes an amplifier stage (14) coupled to an output stage (18). Output stage (18) comprises a sourcing circuit (20) and a sinking circuit (22). The current in sinking circuit (22) is approximately mirrored at low current in mirror circuit (34). At higher currents, resistor (36) maintains the current in mirror circuit (34) below the current in sinking circuit (22). A diode (38) diverts current to mirror circuit (34) to aid sinking circuit (22) in sinking current from a load (12). A current source (29) supplies current to sourcing circuit (20) and mirror circuit (34). A control signal output by amplifier stage (14) causes mirror circuit (34) to draw or not draw current from current source (29). If mirror circuit (34) draws current from current source (29), output stage (18) sinks current in sinking circuit (22). If mirror circuit (34) does not draw current from current source (29), output stage (18) sources current through sourcing circuit (20).
摘要翻译：提供了放大器电路（10）。放大器（10）包括耦合到输出级（18）的放大器级（14）。输出级（18）包括源电路（20）和吸收电路（22）。下沉电路（22）中的电流近似在镜电路（34）中以低电流反射。在较高电流下，电阻器（36）将镜电路（34）中的电流维持在下沉电路（22）中的电流以下。二极管（38）将电流转向镜电路（34）以帮助沉没电路（22）从负载（12）吸收电流。电流源（29）向源电路（20）和镜电路（34）提供电流。由放大器级（14）输出的控制信号使得反射电路（34）从电流源（29）中抽出或不抽取电流。如果镜电路（34）从电流源（29）吸取电流，则输出级（18）吸收下沉电路（22）中的电流。如果镜电路（34）没有从电流源（29）抽出电流，则输出级（18）通过电源电路（20）供电。

22. 发明授权

US5389894A Power amplifier having high output voltage swing and high output drive current 失效
标题翻译：功率放大器具有高输出电压摆幅和高输出驱动电流
公开(公告)号：US5389894A
公开(公告)日：1995-02-14
申请号：US940076
申请日：1992-09-03
申请人： Marc H. Ryat
发明人： Marc H. Ryat
IPC分类号： H03F1/32 , H03F3/30 , H03F3/45
CPC分类号： H03F3/3088 , H03F1/3217 , H03F2203/30045
摘要： A power amplifier has a signal input stage to which an input signal is applied to produce an input stage output. An input signal amplifier is connected to receive the input signal to produce an amplified input signal from an active device at an output of the input signal amplifier. A push-pull signal output stage has first and second transistors. The first transistor has a current path connected between a supply voltage and an output node, and the second transistor has a current path connected between a reference voltage and the output node. The amplifier output provides variable drive current directly to a base of the first transistor, thereby enabling increased drive current to be realized. The power amplifier also includes a common mode biasing circuit connected to bias the first and second transistors for class AB operation, and the input stage output provides a signal base drive current to the first transistor separate from the common mode biasing circuit. This further increases the drive current that can be supplied to the base of the first transistor. By virtue of the direct connection of the current path of the first transistor between the supply voltage and the output node, and its base connection to the output of the input signal amplifier, the voltage on the base of the first transistor is enabled to swing to within 1V.sub.ce SAT from the supply voltage.
摘要翻译：功率放大器具有施加输入信号以产生输入级输出的信号输入级。连接输入信号放大器以接收输入信号，以在输入信号放大器的输出处产生来自有源器件的放大输入信号。推挽信号输出级具有第一和第二晶体管。第一晶体管具有连接在电源电压和输出节点之间的电流路径，并且第二晶体管具有连接在参考电压和输出节点之间的电流路径。放大器输出将可变驱动电流直接提供给第一晶体管的基极，从而实现增加的驱动电流。该功率放大器还包括一个共模偏置电路，该共模偏置电路连接以偏置第一和第二晶体管用于AB类操作，并且输入级输出提供与共模偏置电路分离的第一晶体管的信号基极驱动电流。这进一步增加了可以提供给第一晶体管的基极的驱动电流。由于第一晶体管的电流路径在电源电压和输出节点之间的直接连接及其与输入信号放大器的输出端的基极连接，第一晶体管的基极上的电压能够摆动到在1Vce SAT内的电源电压。

23. 发明授权

US5352992A Amplifier circuit 失效
标题翻译：放大器电路
公开(公告)号：US5352992A
公开(公告)日：1994-10-04
申请号：US59061
申请日：1993-05-07
申请人： Hiroshi Asazawa
发明人： Hiroshi Asazawa
IPC分类号： H03F3/50 , H03F3/30 , H03G11/00 , H03G5/00
CPC分类号： H03F3/3088
摘要： An amplifier circuit having an emitter-grounded amplifying stage formed of a transistor Q1 and a load resistor R.sub.L and having an output stage including an emitter follower formed of transistors Q2 and Q3. The base of the transistor Q1 of the amplifying stage and the base of the transistor Q3 of the output stage are connected with each other for receiving input signals and biased by a bias circuitry 5. The input signals thus given to the base of transistor Q3 for the emitter follower of the output stage cause the transistors Q2 and Q3 to alternately turn on and off to provide a higher output driving power to the load connected to the output terminal than prior art amplifier circuits having conventional emitter followers and resistor feedback amplification networks.
摘要翻译：具有由晶体管Q1和负载电阻RL形成的发射极接地放大级的放大器电路，具有包括由晶体管Q2和Q3形成的射极跟随器的输出级。放大级的晶体管Q1的基极和输出级的晶体管Q3的基极相互连接，用于接收输入信号并被偏置电路5偏置。这样输入到晶体管Q3的基极，用于输出级的射极跟随器使得晶体管Q2和Q3交替地导通和截止，以向连接到输出端的负载提供更高的输出驱动功率，这比现有技术的具有常规发射极跟随器和电阻反馈放大网络的放大器电路。

24. 发明授权

US5021746A Amplifier output stage 失效
标题翻译：放大器输出级
公开(公告)号：US5021746A
公开(公告)日：1991-06-04
申请号：US447353
申请日：1989-12-07
申请人： Luong T. Huynh
发明人： Luong T. Huynh
IPC分类号： H03F3/30
CPC分类号： H03F3/3088
摘要： An amplifier output stage for a loudspeaker includes current sourcing and sinking sections arranged in push-pull and a cascode stage for driving the current section and biasing both the sinking and sourcing sections.

25. 发明授权

US4871977A Monolithic integrated wideband power amplifier 失效
标题翻译：单片集成宽带功率放大器
公开(公告)号：US4871977A
公开(公告)日：1989-10-03
申请号：US265198
申请日：1988-10-31
申请人： Harald Schilling , Bernd Novotny
发明人： Harald Schilling , Bernd Novotny
IPC分类号： H03F1/48 , H01L27/06 , H03F3/30 , H03F3/45
CPC分类号： H01L27/0658 , H03F3/3088 , H03F3/45071
摘要： A monolithic integrated wideband power amplifier circuit has a push-pull output stage, a driver stage, a difference stage which receives an input voltage signal and provides a difference signal, and the improvement of an operating point setter which receives the difference signal and controls the operating point of the circuit through a settable resistor. The setting of the operating point is independent of the gain of the output stage, and both are independent of temperature. The bipolar NPN transistors of the push-pull output stage consists of parallel-connected subtransistors which are arranged in the integrated circuit layout according to their characteristics and specific use, so as to minimize parasitic capacitances and resistances and to keep the upper cutoff frequency as high as possible.
摘要翻译：单片集成宽带功率放大器电路具有推挽输出级，驱动级，差分级，其接收输入电压信号并提供差分信号，以及操作点设定器的改进，其接收差分信号并控制电路的工作点通过可设置的电阻。工作点的设置与输出级的增益无关，并且都与温度无关。推挽输出级的双极NPN晶体管由并联连接的子晶体管组成，它们根据其特性和具体应用被布置在集成电路布局中，以便最小化寄生电容和电阻，并将上限截止频率保持为高尽可能。

26. 发明授权

US4509020A Push-pull amplifier 失效
标题翻译：推挽放大器
公开(公告)号：US4509020A
公开(公告)日：1985-04-02
申请号：US529892
申请日：1983-09-07
申请人： Rudy J. van de Plassche , Eise C. Dijkmans
发明人： Rudy J. van de Plassche , Eise C. Dijkmans
IPC分类号： H03F3/20 , H03F3/30 , H03F3/26
CPC分类号： H03F3/3088
摘要： For a satisfactory cross-over behavior of the transistors T.sub.1 and T.sub.2 of push-pull amplifier comprising an input 2 and an output 3, it is necessary that the sum of the base-emitter voltages of the transistors T.sub.1 and T.sub.2 remains substantially constant. For this purpose a first voltage-current converter 5 is coupled between the base and the emitter of transistor T.sub.1, the inverting input of this converter being coupled to the base of transistor T.sub.1 via a first reference-voltage source 8 and the non-inverting input to the emitter of transistor T.sub.1. Similarly, a second voltage-current converter 9 and a second reference-voltage source 12 are arranged between the base and the emitter of transistor T.sub.2. The output currents of the first and the second voltage-current converters 5 and 9 are compared with each other in the combining circuit 14 which drives the control amplifier 15, which in its turn controls the base-emitter voltage of transistor T.sub.2 in such a way that the sum of the base-emitter voltages of transistor T.sub.1 and T.sub.2 remains constant. The push-pull amplifier exhibits a minimal amount of second-harmonic distortion, because only the difference of the errors introduced by the first and the second voltage-current converters 5 and 9 is of importance in this respect and these errors are substantially equal to each other due to the method of fabrication of the voltage-current converters.
摘要翻译：为了使包括输入2和输出3的推挽放大器的晶体管T1和T2的令人满意的交叉行为，晶体管T1和T2的基极 - 发射极之和的总和必须保持基本恒定。为此，第一电压 - 电流转换器5耦合在晶体管T1的基极和发射极之间，该转换器的反相输入经由第一参考电压源8和非反相输入端耦合到晶体管T1的基极到晶体管T1的发射极。类似地，第二电压 - 电流转换器9和第二参考电压源12被布置在晶体管T2的基极和发射极之间。在驱动控制放大器15的组合电路14中比较第一和第二电压 - 电流转换器5和9的输出电流，控制放大器15又以这种方式控制晶体管T2的基极 - 发射极电压晶体管T1和T2的基极 - 发射极电压之和保持恒定。推挽放大器表现出最小量的二次谐波失真，因为仅在第一和第二电压 - 电流转换器5和9引入的误差的差异在这方面是重要的，并且这些误差基本上等于每个其他由于电压 - 电流转换器的制造方法。

27. 发明授权

US4321428A Acoustic monolithic power semiconductor integrated circuit and acoustic system using the same 失效
标题翻译：声学单片功率半导体集成电路和声学系统使用相同
公开(公告)号：US4321428A
公开(公告)日：1982-03-23
申请号：US87765
申请日：1979-10-24
申请人： Kunio Seki
发明人： Kunio Seki
IPC分类号： H03F3/30 , H03F3/68 , H04S5/02 , H03F3/00
CPC分类号： H03F3/3088 , H03F3/68 , H04S5/02
摘要： An acoustic monolithic IC, which is enabled by a simple modification of the external circuit thereof to realize either the amplification of the left and right channels of stereophonic signals or the application to a balanced transformer-less (BTL) amplifier circuit, is composed of first and second differential amplifier circuits each having non-inverting and inverting inputs and of first and second amplifier output circuits each having non-inverting and inverting inputs.The first differential amplifier circuit has its non-inverting and inverting inputs led as the first and second input terminals of the acoustic monolithic IC to the outside thereof whereas the second differential amplifier circuit has its non-inverting and inverting inputs led as the third and fourth input terminals of the acoustic monolithic IC to the outside thereof.The output signals of the first and second differential amplifier circuits are impressed upon the non-inverting inputs of the first and second amplifier output circuits, respectively. The inverting inputs of the first and second amplifier output circuits are led as first and second feedback terminals to the outside of the acoustic monolithic IC so as to determine the gains and output DC levels of those amplifier output circuits.The output terminals of the first and second amplifier output circuits are led as the first and second output terminals of the acoustic monolithic IC to the outside thereof.
摘要翻译：通过其外部电路的简单修改实现立体声信号的左声道和右声道的放大或者应用于平衡无变压器（BTL）放大器电路的声学单片IC由第一每个具有非反相和反相输入的第二差分放大器电路以及第一和第二放大器输出电路各自具有非反相和反相输入。第一差分放大器电路具有作为声单体IC的第一和第二输入端到其外部的非反相和反相输入端，而第二差分放大器电路的反相和反相输入被引导为第三和第四声学单片IC的输入端到其外部。第一和第二差分放大器电路的输出信号分别施加在第一和第二放大器输出电路的同相输入端上。第一和第二放大器输出电路的反相输入端作为第一和第二反馈端子被引导到声学单片IC的外部，以便确定那些放大器输出电路的增益和输出DC电平。第一和第二放大器输出电路的输出端作为声音单体IC的第一和第二输出端被引导到其外部。

28. 发明授权

US4300103A Push-pull amplifier 失效
标题翻译：推挽放大器
公开(公告)号：US4300103A
公开(公告)日：1981-11-10
申请号：US84042
申请日：1979-10-12
申请人： Rudy J. van de Plassche
发明人： Rudy J. van de Plassche
IPC分类号： H03F1/32 , H03F3/20 , H03F3/30
CPC分类号： H03F3/3088 , H03F1/3217 , H03F3/30
摘要： A push-pull amplifier, having a first and a second transistor of the same conductivity type, whose collector-emitter paths are included in series between two power-supply terminals, the emitter electrode of the first transistor being connected to the collector electrode of the second transistor and to an output terminal, and the base electrode of the first transistor being connected to an input terminal, is improved in respect of its linearity, temperature dependence and bandwidth by measuring the base-emitter voltage of the first transistor with the aid of a series connection of a semiconductor junction and a resistor and by applying said voltage with opposite a.c. component to the base-emitter junction of the second transistor via a coupling circuit.
摘要翻译：一种具有相同导电类型的第一和第二晶体管的推挽放大器，其集电极 - 射极路径串联在两个电源端子之间，第一晶体管的发射极连接到第二晶体管和输出端子，并且第一晶体管的基极连接到输入端子，通过借助于第一晶体管的基极 - 发射极电压来测量其线性度，温度依赖性和带宽来改进半导体结和电阻器的串联连接，并通过施加相反的交流电压分量经由耦合电路到第二晶体管的基极 - 发射极结。

29. 发明授权

US4199797A Protective circuit for amplifier circuits 失效
标题翻译：放大器电路保护电路
公开(公告)号：US4199797A
公开(公告)日：1980-04-22
申请号：US865868
申请日：1977-12-30
申请人： Jiro Kusumi
发明人： Jiro Kusumi
IPC分类号： C22B26/10 , B01D8/00 , H02H3/20 , H03F1/30 , H03F3/30 , H02H3/22
CPC分类号： H02H3/202 , H03F1/302 , H03F3/3088
摘要： A bias circuit including a resistor and a zener diode connected in series between a terminal to be connected to a power source and a ground becomes conductive when a voltage difference across the terminal and ground exceeds a predetermined value to make protective transistors conductive. Upon conduction of the protective transistors, transistors in an amplifier circuit become nonconductive.
摘要翻译：当端子和地之间的电压差超过预定值以使保护晶体管导通时，包括串联连接到电源的端子与地之间的电阻器和齐纳二极管的偏置电路变为导通。在保护晶体管导通时，放大器电路中的晶体管变得不导通。

30. 发明授权

US4025871A Audio amplifier for integrated circuit fabrication having controlled idling current 失效
标题翻译：用于具有受控空闲电流的集成电路制造的音频放大器
公开(公告)号：US4025871A
公开(公告)日：1977-05-24
申请号：US590767
申请日：1975-06-26
申请人： William Peil
发明人： William Peil
IPC分类号： H03F3/30 , H03F3/04
CPC分类号： H03F3/3088
摘要： An audio amplifier is described designed for integrated circuit fabrication and having controlled idling current. The amplifier includes a pre-amplifier designed to be driven from an AM or FM detector or a high impedance ceramic cartridge. The powder amplifier has a pair of like conductivity type output transistors connected in push-pull and driven by a novel interstage driver whose circuit configuration and component parameters are selected to reduce the idling current to a small predictable value. Measures are further provided, including two feedback paths, for insuring stability, minimizing distortion and hum. The amplifier is executed in an integrated circuit format with a minimum of outboarded components and a minimum "pad" requirement.
摘要翻译：描述了一种用于集成电路制造并具有受控空闲电流的音频放大器。该放大器包括一个设计用于从AM或FM检测器或高阻抗陶瓷盒驱动的前置放大器。粉末放大器具有一对类似导电类型的输出晶体管，其以推挽方式连接并由新型级间驱动器驱动，其电路配置和分量参数被选择以将空载电流减小到小的可预测值。进一步提供了措施，包括两个反馈路径，用于确保稳定性，最小化失真和嗡嗡声。放大器采用集成电路格式执行，具有最少的外部元件和最小的“焊盘”要求。

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