In this paper, a method used to amplify faint direct current signal is put forward, and the circuits of direct current amplifier to realize the method are devised.
本文提出一种放大微弱直流信号的方法，同时设计了实现这一方法的直流放大器电路。
The design principle and specific process of the pulse width servo amplifier is introduced, which is used to drive direct current motor to work.
介绍一种脉冲调宽型伺服放大器的设计原理及具体过程。
It must be set up suitable quiescent point in order to works in linear region. This decides that the analysis of amplifier includes direct current analysis and alternating current analysis.
要用他对信号进行不失真地放大，必须设置适当的工作点，使电子器件工作在近似线性区域，这就决定了放大器的分析包括直流分析和交流分析。
It must be set up suitable quiescent point in order to works in linear region. This decides that the analysis of amplifier includes direct current analysis and alternating current analysis.
要用他对信号进行不失真地放大，必须设置适当的工作点，使电子器件工作在近似线性区域，这就决定了放大器的分析包括直流分析和交流分析。
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