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分布式放大是最近宽频带放大的最大成就,过去多年来电子学所应用的各种宽频带放大方法,其高频部分因受电子管电容和线路的分布电容所限制,不能获得理想的结果,而利用分布式放大的理论,所制成的宽频带放大器,远较一般普通的宽频带放大器,有更为宽阔的频带;从它的设计和构造上来看,也较负反馈的宽频带放大器为简单。制造一架自数千周至数百兆周的分布式放大器,在技术上并没有很大困难。本文拟对分布式放大的原理作扼要的分析;并提出了采用各类型仿真线所构成的分布式放大器的设计方法,并利用该设计方法,试作了一只三级十四管的分布式放大器,其增益为33±<1分贝,频宽自100千周至140兆周。由实验结果证明,采用m导出式低通滤波器所构成的仿真线的分布式放大器,实较用常K式者,具有更佳的相移特性和频率特性,这与理论上的分析是一致的。
Distributed amplification is the most recent broadband amplification of the greatest achievements over the years the electronics used in a variety of wideband amplification method, the high frequency part of the tube capacitance and the circuit due to the distribution of capacitance constraints, can not get the desired result, and The use of distributed amplification theory, made of wideband amplifier, far more than the average general wideband amplifier, a broader band; from its design and construction point of view, more negative feedback than the wideband amplifier is simple . It is technically not very difficult to make a distributed amplifier from a few thousand weeks to hundreds of megabytes. This paper intends to make a brief analysis of the principle of distributed amplification; and puts forward the design method of distributed amplifier which is composed of various types of artificial lines. With this design method, a three- The amplifier has a gain of 33 ± <1 dB and a bandwidth of 100 khz to 140 khz. From the experimental results, it is proved that the distributed amplifier with simulation line composed of m-derived low-pass filter is better than the normal K-type with better phase shift and frequency characteristics, which is consistent with the theoretical analysis of.