【摘要】：脈沖信號發(fā)生器是現(xiàn)代測試領(lǐng)域中非常重要的信號源之一,它能輸出多種類型和電平標(biāo)準(zhǔn)的脈沖信號,工程應(yīng)用中通常用來模擬各種激勵(lì)源。通道模塊作為脈沖信號發(fā)生器的重要組成部分,決定了脈沖發(fā)生器輸出信號的高低電平、上升和下降時(shí)間等許多參數(shù)。在極窄脈沖發(fā)生器的設(shè)計(jì)中,通道模塊作為其輸出級決定了最終輸出信號的質(zhì)量,而調(diào)理技術(shù)是通道模塊設(shè)計(jì)的關(guān)鍵技術(shù),它要求實(shí)現(xiàn)對極窄脈沖信號幅度電平等參數(shù)的精密可控,是設(shè)計(jì)中的一大難點(diǎn)。本課題針對極窄脈沖發(fā)生器的通道模塊展開研究,并針對其設(shè)計(jì)難點(diǎn)對多種脈沖信號調(diào)理技術(shù)進(jìn)行研究。線性調(diào)理和非線性調(diào)理技術(shù)是通道調(diào)理的兩個(gè)關(guān)鍵技術(shù),本文基于這兩種關(guān)鍵技術(shù)提出了不同方案并分別進(jìn)行具體電路設(shè)計(jì),對比實(shí)驗(yàn)結(jié)果分析其優(yōu)缺點(diǎn),并最終采用線性調(diào)理和非線性調(diào)理相結(jié)合的方法完成極窄脈沖調(diào)理通道的設(shè)計(jì)。本文主要內(nèi)容包括:(1)分析極窄脈沖信號的特點(diǎn),并結(jié)合脈沖發(fā)生器的國內(nèi)外發(fā)展現(xiàn)狀來論述極窄脈沖通道調(diào)理的技術(shù)難點(diǎn)。(2)對傳統(tǒng)調(diào)理技術(shù)進(jìn)行深入的分析,提出基于RF放大器、差動(dòng)放大電路和引腳驅(qū)動(dòng)器的調(diào)理方案,并分別設(shè)計(jì)實(shí)驗(yàn)電路,根據(jù)實(shí)驗(yàn)結(jié)果論述三種調(diào)理方案的優(yōu)缺點(diǎn)。(3)采用線性調(diào)理和非線性調(diào)理相結(jié)合的技術(shù)擬定新的方案,并采用幅度分段的方式結(jié)合預(yù)加重和偏置技術(shù)設(shè)計(jì)通道調(diào)理電路,根據(jù)項(xiàng)目指標(biāo)對該方案的實(shí)驗(yàn)結(jié)果進(jìn)行分析,并驗(yàn)證其可行性。本文通過對極窄脈沖調(diào)理技術(shù)的研究完成了對頻率范圍15MHz至1.5GHz的極窄脈沖信號的調(diào)理,實(shí)現(xiàn)了對最小脈寬達(dá)200ps脈沖信號的電平控制,并最終應(yīng)用到高速窄脈沖發(fā)生器的通道設(shè)計(jì)中。
[Abstract]:Pulse signal generator is one of the most important signal sources in the field of modern testing. It can output various types and level standard pulse signals. In engineering applications, it is usually used to simulate various excitation sources. As an important part of the pulse signal generator, the channel module determines many parameters, such as the high and low level, rise and fall time of the output signal of the pulse generator. In the design of the very narrow pulse generator, the channel module as its output stage determines the quality of the final output signal, and the conditioning technology is the key technology in the channel module design. It is a difficult point to realize the precision control of the parameters such as amplitude and level of very narrow pulse signal. In this paper, the channel module of the very narrow pulse generator is studied, and various pulse signal conditioning techniques are studied in view of its design difficulties. Linear conditioning and nonlinear conditioning are two key technologies of channel conditioning. Based on these two key technologies, different schemes are proposed and specific circuit designs are carried out respectively, and the advantages and disadvantages of these two key techniques are analyzed by comparing the experimental results. Finally, the narrow pulse conditioning channel is designed by the combination of linear conditioning and nonlinear conditioning. The main contents of this paper are as follows: (1) analyzing the characteristics of very narrow pulse signal, and discussing the technical difficulties of very narrow pulse channel conditioning combined with the development of pulse generator at home and abroad. (2) deeply analyzing the traditional conditioning technology. The conditioning scheme based on RF amplifier, differential amplifier and pin driver is proposed, and the experimental circuits are designed respectively. According to the experimental results, the advantages and disadvantages of the three conditioning schemes are discussed. (3) A new scheme is developed by combining linear and nonlinear conditioning techniques, and the channel conditioning circuit is designed by combining amplitude segmentation with preweighting and biasing techniques. The experimental results are analyzed according to the project index and the feasibility is verified. In this paper, the very narrow pulse signal from 15MHz to 1.5GHz in frequency range is adjusted by studying the very narrow pulse conditioning technology, and the level control of minimum pulse width to 200ps pulse signal is realized. Finally, it is applied to the channel design of high speed narrow pulse generator.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN782
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本文編號：2168281