公开(公告)号：US20030067352A1

公开(公告)日：2003-04-10

申请号：US09972374

申请日：2001-10-05

发明人： Jay K. Cameron

IPC分类号： H03F003/45

CPC分类号： H03F3/3076 ,  H03F1/307 ,  H03F3/26 ,  H03F3/3081 ,  H03F3/3432 ,  H03F3/45475 ,  H03F2200/294 ,  H03F2200/372

摘要： A current feedback amplifier is disclosed for providing a differential output based on a single-ended or differential input signal, having first and second low impedance inputs to receive first and second input signals, and first and second phase shifting systems providing first and second phase shifted input signals based on the second and first input signals. A first intermediate system provides a first intermediate signal comprising the first input signal and the first phase shifted input signal, and a second intermediate system provides a second intermediate signal comprising the second input signal and the second phase shifted input signal, wherein gains may be applied to one or more of the input and/or phase shifted signals. The amplifier further comprises first and second output buffers providing first and second differential output signals based on the first and second intermediate signals, respectively.

公开(公告)号：US20020180526A1

公开(公告)日：2002-12-05

申请号：US10144109

申请日：2002-05-13

发明人： Charles Parkhurst ,  Julio E. Acosta

IPC分类号： H03F003/45

CPC分类号： H03F1/3211 ,  H03F3/26 ,  H03F3/45085 ,  H03F2203/45454 ,  H03F2203/45466

摘要： An emitter coupled pair transconductor circuit includes: an emitter couple pair 20 and 21; and a tail current source coupled to the emitter couple pair wherein the tail current source provides a tail current that is a hyperbolic cosine function relative to a differential input signal. This solution transforms the output current of an emitter couple pair transconductor from a hyperbolic tangent to a hyperbolic sine by using a hyperbolic cosine comparator for the biasing. By doing this, the transconductor has a similar speed behavior to a second-generation current conveyor and is more precise. This transformation makes a regular transconductor very fast without changing its parameters.

摘要翻译： 发射极耦合对跨导电路包括：发射极耦合对20和21; 以及耦合到发射器耦合对的尾电流源，其中尾电流源提供相对于差分输入信号的双向余弦函数的尾电流。 该解决方案通过使用用于偏置的双曲余弦比较器将发射器耦合对跨导体的输出电流从双曲正切转换为双曲正弦。 通过这样做，跨导体具有与第二代电流输送机类似的速度特性并且更精确。 这种变换使得正常的跨导体非常快速，而不改变其参数。

公开(公告)号：US20020014917A1

公开(公告)日：2002-02-07

申请号：US09888460

申请日：2001-06-25

发明人： Rob Maaskant ,  Cornelis Petrus Nuijten

IPC分类号： H03F003/38

CPC分类号： H03F3/26 ,  H03F3/217

摘要： Amplifiers are known and are for example used in Public Address Systems to send audio signals over long distances. To improve the amplifier the invention proposes a amplifier of the push-pull type with a first and a second switch and an output transformer with a primary winding coupled to the switches and a secondary winding coupled to the output of the push-pull amplifier and which output transformer comprises a further secondary winding coupled to a comparator as a feedback loop.

摘要翻译： 放大器是已知的，例如在公共广播系统中用于长距离发送音频信号。 为了改进放大器，本发明提出了具有第一和第二开关的推挽型放大器，以及耦合到开关的初级绕组的输出变压器和耦合到推挽放大器的输出的次级绕组， 输出变压器包括作为反馈回路耦合到比较器的另外的次级绕组。

公开(公告)号：US06323733B1

公开(公告)日：2001-11-27

申请号：US09537721

申请日：2000-03-30

申请人： Dan V. Gorcea ,  David W. Foster ,  Kevin R Parker

发明人： Dan V. Gorcea ,  David W. Foster ,  Kevin R Parker

IPC分类号： H03F326

CPC分类号： H03F3/45475 ,  H03F1/0244 ,  H03F1/565 ,  H03F3/26 ,  H03F2200/541 ,  H04L27/2626

摘要： A power amplifier receives an input analog signal and generates a corresponding power amplified output analog signal. The power amplifier includes first and second power supply rails, an amplifier circuit, and a switch circuit. The first and second power supply rails are capable of supplying power having respective first and second predetermined levels, and a single predetermined polarity. The amplifier circuit is connected to receive the input analog signal and adapted to generate the output analog signal. Finally, the switch circuit is adapted to selectively connect one of the first and second power supply rails to the amplifier circuit.

摘要翻译： 功率放大器接收输入模拟信号并产生相应的功率放大输出模拟信号。 功率放大器包括第一和第二电源轨，放大器电路和开关电路。 第一和第二电源轨能够提供具有相应的第一和第二预定电平的电力以及单个预定极性。 放大器电路被连接以接收输入模拟信号并适于产生输出模拟信号。 最后，开关电路适于选择性地将第一和第二电源轨之一连接到放大器电路。

公开(公告)号：US06229387B1

公开(公告)日：2001-05-08

申请号：US09695940

申请日：2000-10-25

申请人： Fumio Mieda ,  Yasuhiko Mori ,  Hirofumi Mitoma

发明人： Fumio Mieda ,  Yasuhiko Mori ,  Hirofumi Mitoma

IPC分类号： H03F500

CPC分类号： H03F3/20 ,  H03F3/26 ,  H03F5/00 ,  H03F2200/03 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2200/549

摘要： The output signal converter for a tube amplifier includes semiconductor devices for amplifying or attenuating an output signal of the tube amplifier while maintaining the output properties of the tube amplifier. The output signal converter according to one embodiment has an output transformer (TR) having an input terminal (TRa); a first circuit branch (C1) connected between the input terminal (TRa) and an output terminal of the tube amplifier and a second circuit branch (C2) connected to the input terminal (TRa) of the output transformer (TR) and in parallel to the first circuit branch and including components that produce an electric current proportional to a current level in the first circuit branch. The first and second circuit branches are located between the tube amplifier and the output transformer (TR) and include semiconductor devices so that the output signal from the tube amplifier is amplified while maintaining the output properties of the tube amplifier.

摘要翻译： 用于管放大器的输出信号转换器包括用于在保持管放大器的输出特性的同时放大或衰减管放大器的输出信号的半导体器件。 根据一个实施例的输出信号转换器具有具有输入端（TRa）的输出变压器（TR）; 连接在输入端子（TRa）和管放大器的输出端子之间的第一电路支路（C1）和连接到输出变压器（TR）的输入端子（TRa）的第二电路支路（C2） 第一电路分支并且包括产生与第一电路分支中的电流电平成比例的电流的分量。 第一和第二电路分支位于管放大器和输出变压器（TR）之间，并且包括半导体器件，使得来自管放大器的输出信号被放大，同时保持管放大器的输出特性。

公开(公告)号：US6100759A

公开(公告)日：2000-08-08

申请号：US255078

申请日：1999-02-22

申请人： Guglielmo Sirna ,  Giuseppe Palmisano

发明人： Guglielmo Sirna ,  Giuseppe Palmisano

IPC分类号： H03F3/26 ,  H03F3/45

CPC分类号： H03F3/26 ,  H03F3/45071 ,  H03F2200/294 ,  H03F2200/372

摘要： A low noise integrated differential AC amplifier includes a cascode differential input stage comprising first and second branches. The first branch includes a first input transistor and the second branch includes a second input transistor. Each transistor has a collector and an emitter, and the emitters being connected together to define a common emitter node. The amplifier also includes two output stages connected to respective outputs of the first and second branches. Each output stage may include a common collector transistor stage including a bias current generator and a feedback circuit. A first biasing circuit forces a first biasing current through the first input transistor by injecting the first biasing current on the collector thereof. A second biasing circuit forces a second biasing current through the first input transistor by injecting the second biasing current on the collector thereof. A resistance is connected between the common emitter node of the first and second input transistors and a common supply node of the circuit. The low noise amplifier may be used in a radio frequency receiver.

摘要翻译： 低噪声集成差分AC放大器包括包含第一和第二分支的共源共栅差分输入级。 第一分支包括第一输入晶体管，第二分支包括第二输入晶体管。 每个晶体管具有集电极和发射极，并且发射极连接在一起以限定公共发射极节点。 放大器还包括连接到第一和第二分支的相应输出的两个输出级。 每个输出级可以包括公共集电极晶体管级，其包括偏置电流发生器和反馈电路。 第一偏置电路通过在其收集器上注入第一偏置电流来迫使第一偏置电流通过第一输入晶体管。 第二偏置电路通过在其收集器上注入第二偏置电流来迫使第二偏置电流通过第一输入晶体管。 电阻连接在第一和第二输入晶体管的公共发射极节点和电路的公共供电节点之间。 低噪声放大器可以用在射频接收机中。

公开(公告)号：US5684419A

公开(公告)日：1997-11-04

申请号：US347909

申请日：1994-12-01

申请人： Frank Murden ,  Carl W. Moreland

发明人： Frank Murden ,  Carl W. Moreland

IPC分类号： H03F3/26 ,  H03F3/45 ,  H03M1/44 ,  H03M1/12 ,  H03M1/46

CPC分类号： H03F3/26 ,  H03F3/45103 ,  H03F3/45107 ,  H03M1/445 ,  H03F2203/45302 ,  H03F2203/45311 ,  H03F2203/45318 ,  H03F2203/45352 ,  H03F2203/45371 ,  H03F2203/45702 ,  H03F2203/45722

摘要： A serial-type A/D converter uses magnitude amplifiers("magamps") and comparators for effecting the conversion of analog signals to Gray scale code signals that are then converted to binary digital signals by a Gray scale code-to-binary portion of the serial-type A/D converter. More specifically, a serial-type A/D converter uses an n-bit converter that has n-1 magamps and n-comparators. The n-1 magamps are cascaded such that the V.sub.OL and V.sub.OH outputs of a stage are the inputs to the next stage. The output of the comparators are input to the Gray scale code-to-binary portion of the serial A/D converter. The latching of the comparators occurs outside of the magamps. This allows for the parallel latching of the n comparators. The speed of the serial-type A/D converter is determined by the bandwidth of the magamps. The serial-type A/D converter includes an offset method that significantly reduces the effects of early voltage, V.sub.A, on the output waveforms. Each stage of the serial-type A/D converter may have any desired gain and not limited to a particular gain.

摘要翻译： 串行型A / D转换器使用幅度放大器（“magamps”）和比较器来实现将模拟信号转换为灰度代码信号，然后将其转换为二进制数字信号，通过灰度代码对二进制部分 串行型A / D转换器。 更具体地，串行型A / D转换器使用具有n-1个magamp和n比较器的n位转换器。 级联的n-1型卡子使得一级的VOL和VOH输出是下一级的输入。 比较器的输出被输入到串行A / D转换器的灰度代码到二进制部分。 比较器的锁存发生在卡盘之外。 这允许n个比较器的并联闭锁。 串行型A / D转换器的速度由卡盘的带宽决定。 串行型A / D转换器包括一种偏移方法，可显着降低早期电压VA对输出波形的影响。 串行型A / D转换器的每个级可以具有任何期望的增益，而不限于特定的增益。

公开(公告)号：US5673000A

公开(公告)日：1997-09-30

申请号：US583443

申请日：1996-01-05

申请人： James C. Strickland

发明人： James C. Strickland

IPC分类号： H03F1/30 ,  H03F3/26 ,  H03F3/45

CPC分类号： H03F1/308 ,  H03F3/26

摘要： An amplifier providing the linear output of a Class A amplifier and the expanded peak current output and efficiency of a Class AB amplifier. The amplifier includes an input amplifier, a voltage regulator network, a cascode stage, and an output amplifier. The input amplifier amplifies a signal current into two outputs. The cascode stage and the output stage each contain two paths for the amplified outputs. The voltage regulator network interconnects the two paths between the input amplifier and the cascode stage. The voltage regulator network bypasses a high percentage of the quiescent current that is normally contained in the two paths of the cascode stage and the output amplifier stage, thus improving the peak-to-quiescent current output ratio beyond the 2:1 value of traditional Class A amplifiers.

摘要翻译： 提供A类放大器的线性输出的放大器和AB类放大器的扩展峰值电流输出和效率。 放大器包括输入放大器，电压调节器网络，共源共栅级和输出放大器。 输入放大器将信号电流放大为两个输出。 共源共栅级和输出级各自包含放大输出的两个路径。 电压调节器网络将输入放大器和共源共栅级之间的两条路径相互连接。 电压调节器网络绕过通常包含在共源共栅级和输出放大器级的两个路径中的高百分比的静态电流，从而将峰值与静态电流输出比提高到超过传统等级的2：1值 A放大器。

公开(公告)号：US5410274A

公开(公告)日：1995-04-25

申请号：US210269

申请日：1994-03-17

申请人： Dwight D. Birdsall ,  Phillip L. Elliott ,  Lloyd F. Linder ,  Kelvin T. Tran ,  Donald G. McMullin

发明人： Dwight D. Birdsall ,  Phillip L. Elliott ,  Lloyd F. Linder ,  Kelvin T. Tran ,  Donald G. McMullin

IPC分类号： H03F3/26 ,  H03F3/30 ,  H03F3/45

CPC分类号： H03F3/3081 ,  H03F3/26 ,  H03F3/3067

摘要： First and second current feedback transconductance amplifiers (102,104) each have a high impedance voltage input, a low impedance current input and a pair of push-pull current outputs. In a single-ended configuration, an input signal is applied to the voltage input of the first transconductance amplifier (102) and the push-pull outputs of the both transconductance amplifiers are connected through a current mirror (136,138) to a node (134) where the current outputs are summed. The node current is integrated by a capacitor (174) to produce a voltage which is amplified by a transimpedance amplifier (190) to produce an output voltage which is fed back to the voltage input of the second transconductance amplifier (104). The current inputs of the transconductance amplifiers (102,104) are interconnected by a resistor (132). The high impedance voltage inputs produce common-mode cancellation of distortion in the transconductance amplifiers (102,104) and low input shot noise. In a differential configuration, differential input signals are applied to the voltage inputs of transconductance amplifiers (260,262), and a separate transimpedance amplifier (292,316) and current mirror (278,280) (302,304) is provided for each transconductance amplifier (260,262). A common-mode feedback circuit (352) controls the common-mode output voltages of the transimpedance amplifiers (292,316) to ground. Switch means (402,404,406,408,410,412) may be added to selectively ground the voltage inputs of the transconductance amplifiers (260,262) and disable their input stages by disconnecting their power supplies (VCC,VEE).

摘要翻译： 第一和第二电流反向跨导放大器（102,104）各自具有高阻抗电压输入，低阻抗电流输入和一对推挽电流输出。 在单端配置中，输入信号被施加到第一跨导放大器（102）的电压输入，并且两个跨导放大器的推挽输出通过电流镜（136,138）连接到节点（134） 其中当前输出相加。 节点电流由电容器（174）积分以产生被跨阻放大器（190）放大的电压，以产生反馈到第二跨导放大器（104）的电压输入端的输出电压。 跨导放大器（102,104）的电流输入通过电阻器（132）互连。 高阻抗电压输入产生跨导放大器（102,104）中的失真的共模消除和低输入散射噪声。 在差分配置中，差分输入信号被施加到跨导放大器（260,262）的电压输入端，并为每个跨导放大器（260,262）提供单独的跨阻抗放大器（292,316）和电流镜（278,308）（302,304）。 共模反馈电路（352）控制跨阻放大器（292,316）的共模输出电压接地。 可以添加开关装置（402,404,406,408,410,412）以有选择地接地跨导放大器（260,262）的电压输入，并且通过断开它们的电源（VCC，VEE）来禁用它们的输入级。

公开(公告)号：US5357213A

公开(公告)日：1994-10-18

申请号：US131965

申请日：1993-10-08

申请人： Jean Michel ,  Jean-Claude Combe ,  Herminio de Faria

发明人： Jean Michel ,  Jean-Claude Combe ,  Herminio de Faria

IPC分类号： H03F3/26 ,  H03F3/60

CPC分类号： H03F3/60 ,  H03F3/26

摘要： A high-frequency wideband power amplifier, of the type comprising an amplifier stage with at least two transistors mounted as a differential stage, coupled at input and at output to a matching circuit further comprises, in order to convey each bias voltage to the amplifier stage, at least one high-frequency transmission line section with a length close to a quarter of the wavelength of the carrier of the signal to be amplified, the impedance of which, brought in parallel on each transistor, is negligible with respect to the high frequencies and the series impedance of which is negligible in the baseband of the signal to be amplified; the line sections conveying the bias voltages to the input of each transistor are identical to one another in length and in impedance, and the same is the case for the line sections conveying the bias voltages to the output of each transistor.

摘要翻译： 一种高频宽带功率放大器，其类型包括具有安装为差分级的至少两个晶体管的放大器级，其输入和输出端耦合到匹配电路，还包括为了将每个偏置电压传送到放大器级 至少一个高频传输线部分，其长度接近待放大信号的载波波长的四分之一，其阻抗在每个晶体管上并联，对于高频是可以忽略的 并且其串联阻抗在要放大的信号的基带中是可忽略的; 将偏置电压传送到每个晶体管的输入的线路部分的长度和阻抗彼此相同，并且对于将偏置电压传送到每个晶体管的输出的线路部分也是相同的。