-
公开(公告)号：US07551017B2
公开(公告)日：2009-06-23
申请号：US11304312
申请日：2005-12-14
申请人： Matthew D. Felder
发明人： Matthew D. Felder
IPC分类号： H03L5/00
CPC分类号： H03F3/34
摘要： A level shifter includes a first level shift module for producing a shifted signal by adjusting a direct current (DC) level of an input signal by a first bias voltage having a first polarity. A second level shift module produces an output signal by adjusting a DC level of the shifted signal by a second bias voltage having a second polarity. The first polarity is opposite to the second polarity and the sum of the first bias voltage and the second bias voltage is a non-zero voltage.
摘要翻译： 电平移位器包括第一电平移位模块，用于通过利用具有第一极性的第一偏置电压来调节输入信号的直流电平（DC）来产生移位信号。 第二电平移位模块通过利用具有第二极性的第二偏置电压来调整移位信号的直流电平来产生输出信号。 第一极性与第二极性相反，并且第一偏置电压和第二偏置电压的和是非零电压。
-
公开(公告)号：US07348850B2
公开(公告)日：2008-03-25
申请号：US10575772
申请日：2004-10-06
申请人： Rachid El Waffaoui
发明人： Rachid El Waffaoui
IPC分类号： H03F3/04
CPC分类号： H03F3/72 , H03F1/26 , H03F3/34 , H03F2200/153 , H03F2200/372
摘要： Consistent with an example embodiment, there is an electronic circuit for amplification of bipolar symmetric current signals. The electronic circuit has a pair of complimentary current mirrors. Depending on the polarity of the bipolar current signal one or the current mirrors is active while the other current mirror is in an off state. This way adding a biasing current to the input signal is avoided which substantially reduces noise.
摘要翻译： 与示例性实施例一致，存在用于放大双极对称电流信号的电子电路。 电子电路有一对补偿电流镜。 根据双极性电流信号的极性，一个或电流镜是活动的，而另一个电流镜处于关闭状态。 这样可以避免向输入信号增加偏置电流，从而大大降低噪声。
-
公开(公告)号：US6057731A
公开(公告)日：2000-05-02
申请号：US158838
申请日：1998-09-23
申请人： Dan Gorcea , Robert M. Thomas
发明人： Dan Gorcea , Robert M. Thomas
摘要： The invention is an amplifier configuration which provides signal gain at very low levels of distortion. The inventive amplifier configuration consists of two amplifiers whose outputs are added to give the total amplified signal. A first amplifier functions in the usual way, amplifying a signal from a voltage source and having a controllable feedback gain. A second amplifier is also fed by the voltage source but applies a feedback gain to the total amplified signal rather than to its own output signal. By selecting the feedback gains to be substantially identical, portions of voltage waveforms that have been removed or altered due to clipping or other forms of distortion are restored by the second amplifier. The invention is particularly useful when amplifier gain is low, e.g., at high frequencies. Suitable implementations are in the voltage domain, using operational amplifiers, or in the current domain, using, for example, voltage-controlled current sources.
-
公开(公告)号：US5912585A
公开(公告)日：1999-06-15
申请号：US958482
申请日：1997-10-27
申请人： Kazutoshi Yamada
发明人： Kazutoshi Yamada
CPC分类号： H03F3/28 , H03F3/181 , H03F3/34 , H03F5/00 , H03F2200/48 , H03F2200/541
摘要： In a direct coupled type vacuum tube amplifying circuit, to stabilize the operation and simplify the feedback loop, a plate power source EB5 is connected to a plate of a vacuum tube V5 of a first stage through a constant current source 1. A grid of a vacuum tube V6 of a next stage is connected to the plate of the vacuum tube V5 through a first resistance R3. A second resistance R4 is connected between the grid and the cathode of the vacuum tube V6. A negative power source EC6 is connected to the resistance R4 through a constant current source 2. In this constitution, the grid bias voltage of the second vacuum tube V6 is defined by the voltage drop of the second resistance R4.
摘要翻译： 在直接耦合型真空管放大电路中，为了稳定操作并简化反馈回路，板电源EB5通过恒流源1连接到第一级的真空管V5的板。 下一级的真空管V6通过第一电阻R3与真空管V5的板连接。 第二电阻R4连接在真空管V6的栅极和阴极之间。 负电源EC6通过恒流源2与电阻R4连接。在这种结构中，第二真空管V6的栅极偏置电压由第二电阻R4的电压降定义。
-
公开(公告)号：US20170264196A1
公开(公告)日：2017-09-14
申请号：US15257131
申请日：2016-09-06
发明人： Hiroyuki IDENO , Hidefumi Kushibe
IPC分类号： H02M3/158
CPC分类号： H02M3/158 , G05F1/563 , G05F1/565 , G05F1/571 , G05F1/575 , H03F3/34 , H03F2200/555 , H03F2200/78
摘要： According to one embodiment, in a semiconductor integrated circuit, a first input terminal of an error amplifier is electrically connected to a third node between a second node and a reference potential. A second input terminal of the error amplifier is electrically connected to a reference voltage. An output terminal of the error amplifier is electrically connected to a gate of an output transistor. A first input terminal of a comparator is electrically connected to a fourth node between the second node and the reference potential. A second input terminal of the comparator is electrically connected to the reference voltage. One end of a coupling capacitance is electrically connected to an output terminal of the comparator. A gate of an auxiliary transistor is electrically connected to the other end of the coupling capacitance. A drain of the auxiliary transistor is electrically connected to the second node.
-
公开(公告)号：US20050024140A1
公开(公告)日：2005-02-03
申请号：US10627669
申请日：2003-07-28
申请人： Ted Humphrey
发明人： Ted Humphrey
CPC分类号： H03F3/34 , H03F3/3076 , H03F3/45475 , H03F2200/91
摘要： This patent teaches the creation and use of current amplifiers. The use of current inputs allows one to use techniques normally associated with Current Feed Amplifiers. The patent uses a family of topologies that include two inputs that are responsive to currents. These two inputs are substantially equal in properties. This is an improvement over existing Current Feedback Amplifier designs where there is actually one voltage input and one current input which draws a lot of current as it is really the output of a buffer. This patent uses amplifier topologies that give us amplifiers with lower distortion, improved frequency response, increased DC stability, and increased stability of internal biasing than prior art. This is accomplished with a simplification of circuit complexity, reduced reliance upon Vbe matching of transistors, and takes away the need to use the long-tailed pair for amplification. The patent teaches embodiments that go beyond that of Current Feedback Amplifiers as currently implemented. This patent teaches how to amplify a signal (or the difference of two signals) by the use of dual amplified (buffered) current subtractions at a high impedance point. Some of the topologies can be used at very low supply voltages without the usual loss of performance.
摘要翻译： 该专利教导了当前放大器的创建和使用。 使用电流输入可以使用通常与电流进给放大器相关的技术。 该专利使用一系列拓扑结构，其中包括对电流响应的两个输入。 这两个输入的性质基本相同。 这是对现有的电流反馈放大器设计的改进，其中实际上有一个电压输入和一个电流输入，其吸收了大量电流，因为它实际上是缓冲器的输出。 该专利使用放大器拓扑，其给出了比现有技术更低的失真，改善的频率响应，增加的DC稳定性和增加的内部偏置的稳定性的放大器。 这是通过简化电路复杂性，减少对晶体管的Vbe匹配的依赖性而实现的，并且消除了使用长尾对进行放大的需要。 该专利教导了超出当前实现的电流反馈放大器的实施例。 该专利教导了如何通过在高阻抗点使用双放大（缓冲）电流减法来放大信号（或两个信号的差异）。 一些拓扑可以在非常低的电源电压下使用，而不会造成通常的性能损失。
-
7.发明授权公开(公告)号：US06580315B1
公开(公告)日：2003-06-17
申请号：US10115654
申请日：2002-04-04
申请人： Jeremy R. Kuehlwein
发明人： Jeremy R. Kuehlwein
IPC分类号： H03F102
摘要： A low-power solution for maintaining an amplifier common-mode output voltage, regardless of whether the amplifier is on or off, that does not degrade the performance of the amplifier through the use of a passgate in the signal path.
摘要翻译： 一种用于维持放大器共模输出电压的低功耗解决方案，无论放大器是打开还是关闭，都不会通过在信号路径中使用通道来降低放大器的性能。
-
公开(公告)号：US06529080B1
公开(公告)日：2003-03-04
申请号：US09951686
申请日：2001-09-11
IPC分类号： H03F304
CPC分类号： H03F3/34 , H03F1/302 , H03F1/32 , H03F2200/372
摘要： An apparatus comprising an amplifier and a circuit. The amplifier may be configured to amplify an input signal. The circuit may be configured to (i) control the amplifier, (ii) compensate for non-linear characteristics of the amplifier, (iii) increase third-order intercept (TOI) and (iv) increase the output 1 dB compression point (P1 dB).
摘要翻译： 一种包括放大器和电路的装置。 放大器可以被配置为放大输入信号。 电路可以被配置为（i）控制放大器，（ii）补偿放大器的非线性特性，（iii）增加三阶截距（TOI）和（iv）增加输出1dB压缩点（P1 dB）。
-
公开(公告)号：US6137359A
公开(公告)日：2000-10-24
申请号：US457000
申请日：1999-12-07
申请人： Dan Gorcea , Robert M. Thomas
发明人： Dan Gorcea , Robert M. Thomas
摘要： The invention is an amplifier configuration which provides signal gain at very low levels of distortion. The inventive amplifier configuration consists of two amplifiers whose outputs are added to give the total amplified signal. A first amplifier functions in the usual way, amplifying a signal from a voltage source and having a controllable feedback gain. A second amplifier is also fed by the voltage source but applies a feedback gain to the total amplified signal rather than to its own output signal. By selecting the feedback gains to be substantially identical, portions of voltage waveforms that have been removed or altered due to clipping or other forms of distortion are restored by the second amplifier. The invention is particularly useful when amplifier gain is low, e.g., at high frequencies. Suitable implementations are in the voltage domain, using operational amplifiers, or in the current domain, using, for example, voltage-controlled current sources.
摘要翻译： 本发明是以非常低的失真水平提供信号增益的放大器配置。 本发明的放大器配置由两个放大器组成，其放大器的输出被加到总放大信号上。 第一放大器以通常的方式起作用，放大来自电压源的信号并具有可控的反馈增益。 第二放大器也由电压源馈送，但是对总放大信号而不是其自己的输出信号施加反馈增益。 通过选择基本相同的反馈增益，由第二放大器恢复由于限幅或其他形式的失真而被去除或改变的电压波形的部分。 当放大器增益低，例如在高频时，本发明特别有用。 合适的实施方式是使用例如电压控制电流源的电压域，使用运算放大器，或在当前域中。
-
-
-
-
-
-
-
-
-
搜索结果
34 条记录 (耗时 0.014 秒)
