公开(公告)号：US07855602B2

公开(公告)日：2010-12-21

申请号：US12418221

申请日：2009-04-03

申请人： Carlo Fiocchi ,  Andrea Pierin

发明人： Carlo Fiocchi ,  Andrea Pierin

IPC分类号： H03F1/14

CPC分类号： H03F1/083 ,  H03F1/14 ,  H03F1/26 ,  H03F3/45183 ,  H03F2200/135 ,  H03F2200/153 ,  H03F2200/372 ,  H03F2200/78 ,  H03F2203/45248 ,  H03F2203/45392

摘要： An amplifier arrangement includes an output amplifier stage (OA) comprising a stage input (SIN), a stage output (SOUT) which is coupled to a signal output (OUT) of the amplifier arrangement, and a capacitive element (CE) which couples the stage output (SOUT) to the stage input (SIN). A driver stage (DR) comprises a driver input (DIN) and a driver output (DOUT) which is coupled to the stage input (SIN). The driver stage (DR) is configured to generate a voltage potential at a driver output (DOUT) depending on an input current at the driver input (DIN) and to provide a charging current to the capacitive element (CE) being higher than the input current.

摘要翻译： 放大器装置包括：输出放大器级（OA），其包括级输入（SIN），耦合到放大器装置的信号输出（OUT）的级输出（SOUT）和耦合 舞台输出（SOUT）到舞台输入（SIN）。 驱动器级（DR）包括驱动器输入（DIN）和耦合到级输入（SIN）的驱动器输出（DOUT）。 驱动器级（DR）被配置为根据驱动器输入（DIN）处的输入电流产生驱动器输出（DOUT）处的电压电位，并且向电容元件（CE）提供高于输入的充电电流 当前。

公开(公告)号：US07843272B2

公开(公告)日：2010-11-30

申请号：US12533113

申请日：2009-07-31

申请人： Kouichiro Yamaguchi

发明人： Kouichiro Yamaguchi

IPC分类号： H03F3/04

CPC分类号： H03F1/347 ,  H03F1/22 ,  H03F1/26 ,  H03F1/565 ,  H03F3/19 ,  H03F3/4508 ,  H03F3/50 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/117 ,  H03F2200/153 ,  H03F2200/294 ,  H03F2200/36 ,  H03F2200/372 ,  H03F2200/451 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2203/5009

摘要： A low noise amplifier having a wide operating frequency band and a high dynamic range is provided. A transformer having a secondary winding connected between an input terminal to which an input signal is applied and a positive differential output terminal, and a primary winding connected between a negative differential output terminal and an input node is provided as a feedback circuit between a cascode amplifier circuit, which includes transistors and a resistor, and an output circuit, which includes a transistor and a constant current source. Selective use of a transformer whose leakage inductance has an adequate value as the feedback transformer can realize a low noise amplifier which has a wide operating frequency band and a high dynamic range.

摘要翻译： 提供具有宽工作频带和高动态范围的低噪声放大器。 具有连接在施加输入信号的输入端子与正差分输出端子之间的次级绕组的变压器和连接在负差分输出端子和输入节点之间的初级绕组被提供为共源共栅放大器之间的反馈电路 电路，其包括晶体管和电阻器，以及包括晶体管和恒流源的输出电路。 漏电感值为反馈变压器的变压器的选择性使用可以实现具有宽工作频带和高动态范围的低噪声放大器。

公开(公告)号：US20100259237A1

公开(公告)日：2010-10-14

申请号：US12475522

申请日：2009-05-31

申请人： Zhao Wang

发明人： Zhao Wang

IPC分类号： G05F1/10 ,  H03F1/34

CPC分类号： H03F1/342 ,  G05F3/242 ,  H03F1/14 ,  H03F3/45183 ,  H03F2200/153 ,  H03F2203/45648 ,  H03F2203/45702

摘要： An improved compensation circuit with loop compensation is disclosed. The compensation circuit can get an equivalent large capacitance by amplifying a small capacitor. Hence, the compensation circuit can get a good compensation effect with a minimum chip area, hence lower cost.

摘要翻译： 公开了一种具有环路补偿的改进的补偿电路。 补偿电路可以通过放大小电容器获得等效的大电容。 因此，补偿电路可以以最小的芯片面积获得良好的补偿效果，从而降低成本。

公开(公告)号：US07786801B2

公开(公告)日：2010-08-31

申请号：US12205364

申请日：2008-09-05

申请人： Hyoung Rae Kim

发明人： Hyoung Rae Kim

IPC分类号： H03F3/45

CPC分类号： H03F3/45192 ,  H03F1/0205 ,  H03F1/083 ,  H03F3/3022 ,  H03F3/45219 ,  H03F3/45475 ,  H03F2200/153 ,  H03F2203/30015 ,  H03F2203/45236 ,  H03F2203/45244 ,  H03F2203/45248 ,  H03F2203/45318 ,  H03F2203/45352 ,  H03F2203/45512 ,  H03F2203/45626 ,  H03F2203/45726

摘要： An operational amplifier includes a differential amplifier, an output stage, and a control unit. The differential amplifier generates a first current through a first output node and a second current through a second output node in response to a voltage difference between a first input signal input through a first input terminal and a second input signal input through a second input terminal. The output stage generates an output signal through an output node. The control unit receives a voltage of the first output node and a voltage of the second output node, as bias voltages, and controls an output current of the output stage to determine the output signal of the output stage in response to the received voltages of the first and second output nodes.

摘要翻译： 运算放大器包括差分放大器，输出级和控制单元。 响应于通过第一输入端子输入的第一输入信号和通过第二输入端子输入的第二输入信号之间的电压差，差分放大器产生通过第一输出节点的第一电流和通过第二输出节点的第二电流。 输出级通过输出节点产生输出信号。 控制单元接收第一输出节点的电压和第二输出节点的电压作为偏置电压，并且控制输出级的输出电流，以响应于所接收到的电压来确定输出级的输出信号 第一和第二输出节点。

公开(公告)号：US07768352B2

公开(公告)日：2010-08-03

申请号：US12180930

申请日：2008-07-28

申请人： Sehat Sutardja

发明人： Sehat Sutardja

IPC分类号： H03F3/45

CPC分类号： H03F1/086 ,  H03F3/3001 ,  H03F3/45179 ,  H03F2200/153 ,  H03F2203/30033 ,  H03F2203/45028 ,  H03F2203/45318 ,  H03F2203/45424

摘要： A multi-stage Class AB amplifier system comprises a first Class AB amplifier circuit that receives an input signal. A bias circuit receives an output of the first Class AB amplifier circuit. A second Class AB amplifier circuit having an input that communicates with an output of the bias circuit and that generates an output signal. A common-mode feedback circuit generates a feedback signal to the first Class AB amplifier circuit based on the output signal.

摘要翻译： 多级AB类放大器系统包括接收输入信号的第一AB类放大器电路。 偏置电路接收第一AB类放大器电路的输出。 具有与偏置电路的输出通信并产生输出信号的输入的第二AB类放大器电路。 共模反馈电路基于输出信号产生到第一AB类放大器电路的反馈信号。

公开(公告)号：US07714656B2

公开(公告)日：2010-05-11

申请号：US12053406

申请日：2008-03-21

申请人： Hyunjoong Lee ,  Young Sik Kim ,  Suhwan Kim

发明人： Hyunjoong Lee ,  Young Sik Kim ,  Suhwan Kim

IPC分类号： H03F3/45

CPC分类号： H03F3/45192 ,  H03F1/083 ,  H03F3/45654 ,  H03F3/45659 ,  H03F2200/153 ,  H03F2203/45302 ,  H03F2203/45354 ,  H03F2203/45512 ,  H03F2203/45652 ,  H03F2203/45681

摘要： An operational amplifier including an input amplifier configured to amplify at least one differential input signal, a first common mode feedback amplifier configured to amplify a first common mode voltage, a cascode amplifier configured to cascode-amplify output signals from the input amplifier and the first common mode feedback amplifier, a first common mode voltage generator configured to generate a central voltage of the output signal from the cascode amplifier and input the central voltage to the first common mode feedback amplifier, and a frequency compensator configured to feedback the output signal of the cascode amplifier to the first common mode feedback amplifier so as to compensate a frequency of the first common mode feedback amplifier.

摘要翻译： 一种运算放大器，包括被配置为放大至少一个差分输入信号的输入放大器，被配置为放大第一共模电压的第一共模反馈放大器，被配置为对来自输入放大器和第一公共端的输出信号进行共源共放大的共源共栅放大器 模式反馈放大器，第一共模电压发生器，其被配置为产生来自所述共源共栅放大器的输出信号的中心电压并将所述中心电压输入到所述第一共模反馈放大器;以及频率补偿器，被配置为反馈所述共源共栅的输出信号 放大器到第一共模反馈放大器，以补偿第一共模反馈放大器的频率。

公开(公告)号：US20100066449A1

公开(公告)日：2010-03-18

申请号：US12486759

申请日：2009-06-18

申请人： Uday Dasgupta

发明人： Uday Dasgupta

IPC分类号： H03F3/45

CPC分类号： H03F3/45192 ,  H03F1/086 ,  H03F2200/153 ,  H03F2200/45 ,  H03F2203/45632 ,  H03F2203/45674

摘要： A three-stage frequency-compensated operational amplifier includes a first-stage circuit, a second-stage circuit incorporated with a first compensation circuit, a third-stage circuit, and a second compensation circuit. The three-stage frequency-compensated operational amplifier functions as a two-stage operational amplifier at high frequencies, thereby capable of driving large capacitive loads with low power consumption.

摘要翻译： 三级频率补偿运算放大器包括第一级电路，并入有第一补偿电路的第二级电路，第三级电路和第二补偿电路。 三级频率补偿运算放大器在高频下用作两级运算放大器，从而能够以低功耗驱动大容量负载。

公开(公告)号：US07652531B2

公开(公告)日：2010-01-26

申请号：US12040915

申请日：2008-03-02

申请人： Zhenwu Wang ,  Dong An ,  Huixing Jin

发明人： Zhenwu Wang ,  Dong An ,  Huixing Jin

IPC分类号： H03F1/34

CPC分类号： H03F1/34 ,  H03F1/08 ,  H03F3/187 ,  H03F3/3072 ,  H03F3/3076 ,  H03F3/45085 ,  H03F2200/03 ,  H03F2200/129 ,  H03F2200/135 ,  H03F2200/153 ,  H03F2200/408 ,  H03F2203/30078 ,  H03F2203/30111 ,  H03F2203/45392

摘要： The present invention provides a cost-effective and power-effective solution to a high performance amplifier design over conventional Class A and Class B/AB amplifiers. Without increasing cost or losing simplification of conventional Class B/AB amplifier configuration, two kinds of unique local feedback loops, which cover the second and third stages and further offer a feedback shifting feature over frequency range, are disclosed to replace the traditional Miller compensation capacitor to suppress dominant distortion, which is usually generated by the two last stages while maintaining stability of the amplifier, through high frequency end. Since the present invention provides key elements of a three-stage amplifier that enable performance improvement in a wide range of circuit design, the present invention has significant commercial values in amplifier circuit industries including audio power amplifiers, IC (integrated circuit) operational amplifiers, ADC (Analog-to-Digital Conversion) and DAC (Digital-to-Analog Conversion) buffers, etc.

摘要翻译： 本发明针对传统的A类和B / AB类放大器提供了高性能放大器设计的成本效益和功率有效的解决方案。 传统的B / AB放大器配置不增加成本或简化传统的B / AB放大器配置，公开了两种独特的局部反馈回路，其覆盖了第二和第三级，并进一步提供了频率范围内的反馈移位特性，以取代传统的米勒补偿电容器 通过高频端抑制通常由两个最后阶段产生的显着失真，同时保持放大器的稳定性。 由于本发明提供了能够在宽范围的电路设计中实现性能改进的三级放大器的关键元件，本发明在放大器电路工业中具有显着的商业价值，包括音频功率放大器，IC（集成电路）运算放大器，ADC （模拟 - 数字转换）和DAC（数模转换）缓冲器等。

公开(公告)号：US20090251219A1

公开(公告)日：2009-10-08

申请号：US12418221

申请日：2009-04-03

申请人： Carlo FIOCCHI ,  Andrea PIERIN

发明人： Carlo FIOCCHI ,  Andrea PIERIN

IPC分类号： H03F1/38

CPC分类号： H03F1/083 ,  H03F1/14 ,  H03F1/26 ,  H03F3/45183 ,  H03F2200/135 ,  H03F2200/153 ,  H03F2200/372 ,  H03F2200/78 ,  H03F2203/45248 ,  H03F2203/45392

摘要： An amplifier arrangement includes an output amplifier stage (OA) comprising a stage input (SIN), a stage output (SOUT) which is coupled to a signal output (OUT) of the amplifier arrangement, and a capacitive element (CE) which couples the stage output (SOUT) to the stage input (SIN). A driver stage (DR) comprises a driver input (DIN) and a driver output (DOUT) which is coupled to the stage input (SIN) The driver stage (DR) is configured to generate a voltage potential at a driver output (DOUT) depending on an input current at the driver input (DIN) and to provide a charging current to the capacitive element (CE) being higher than the input current.

摘要翻译： 放大器装置包括：输出放大器级（OA），其包括级输入（SIN），耦合到放大器装置的信号输出（OUT）的级输出（SOUT）和耦合 舞台输出（SOUT）到舞台输入（SIN）。 驱动器级（DR）包括驱动器输入（DIN）和耦合到级输入（SIN）的驱动器输出（DOUT）。驱动器级（DR）被配置为在驱动器输出（DOUT）处产生电压电位， 取决于驱动器输入（DIN）处的输入电流，并且向电容元件（CE）提供高于输入电流的充电电流。

公开(公告)号：US07564306B2

公开(公告)日：2009-07-21

申请号：US11808869

申请日：2007-06-13

申请人： Chao-Cheng Lee ,  Chieh-Min Feng

发明人： Chao-Cheng Lee ,  Chieh-Min Feng

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F1/08 ,  H03F1/086 ,  H03F3/45946 ,  H03F2200/153 ,  H03F2203/45074 ,  H03F2203/45082 ,  H03F2203/45114 ,  H03F2203/45118 ,  H03F2203/45134 ,  H03F2203/45136 ,  H03F2203/45418 ,  H03F2203/45424

摘要： A common-mode feedback circuit is provided. An amplifier with a common-mode feedback circuit is compensated by adding a compensating unit so that the amplifier totally has two poles and one zero in its frequency response. Accordingly, the gain of the amplifier is not sacrificed, and both the stability and the phase margin of the circuit are improved.

摘要翻译： 提供了共模反馈电路。 具有共模反馈电路的放大器通过添加补偿单元来补偿，使得放大器在其频率响应中总共具有两个极点和一个零点。 因此，不牺牲放大器的增益，并且提高了电路的稳定性和相位裕度。