论文部分内容阅读
展宽放大器的通频带,是宽带放大器设计中的一个重要问题。为了展宽频带,一般采用的方法有:(1)在负载中引入电抗性元件,以获得一定的高频补偿。(2)引入负反馈,用牺牲放大倍数来换取频带的展宽,但此法并不改变放大器的带宽增益乘积。(3)引入负反馈,且在反馈回路中引入电抗性元件对放大器的高频特性进行补偿,此法的优点是可以提高放大器的带宽增益乘积,缺点是设计反馈回路中电抗元件的参数以达到最佳补偿比较困难。为了获得最佳补偿,通常采用等系数法,但此法计算复杂,应用起来很不方便。为此,本文直接从传递函数的零极点出发进行设计,既避免
Widening amplifier passband, broadband amplifier design is an important issue. In order to broaden the band, the commonly used methods are: (1) the introduction of reactive components in the load, in order to obtain a certain high-frequency compensation. (2) The introduction of negative feedback at the expense of amplification in exchange for the broadening of the band, but this method does not change the amplifier bandwidth gain product. (3) The introduction of negative feedback, and the introduction of reactive components in the feedback loop to compensate for the high-frequency characteristics of the amplifier, this method has the advantage of increasing the amplifier bandwidth gain product, the disadvantage is the design of the feedback loop impedance components to achieve The best compensation is more difficult. In order to obtain the best compensation, usually using the same coefficient method, but this method is complicated to calculate, it is inconvenient to use. To this end, this paper directly from the transfer function of the zero-pole design, both to avoid