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    • 3. 发明授权
    • Level shifter and methods for use therewith
    • 电平移位器及其使用方法
    • US07551017B2
    • 2009-06-23
    • US11304312
    • 2005-12-14
    • Matthew D. Felder
    • Matthew D. Felder
    • H03L5/00
    • H03F3/34
    • 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.
    • 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。
    • 8. 发明申请
    • SYMMETRICAL CURRENT AMPLIFIER
    • 对称电流放大器
    • US20050024140A1
    • 2005-02-03
    • US10627669
    • 2003-07-28
    • Ted Humphrey
    • Ted Humphrey
    • H03F3/34H03F3/45
    • H03F3/34H03F3/3076H03F3/45475H03F2200/91
    • 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.
    • 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。