【正文】 uits, these signals are generated by the wave and transformed circuit. Waveform generator circuit is a energy output circuit which can transform DC into Energy exchange, also known as oscillator or waveform generator. In the context, the sine signal can be produced by a sine wave oscillator, there are a lot of so circuits, after analysis and parison using RC bridge oscillator circuit ,which also known as the RC Bridge oscillator circuit. This kind of oscillation circuit is using RC seriesparallel circuit as the selected frequency work, which can adjust to meet the sine wave frequency signals. The pulse signal source is generated by the multicircuit harmonic oscillator by the 555 and lager circuit, known as the rectangular pulse generator circuit. During the design process, I analysis the characteristics of the two circuits, and improve the circuit according to the design requirements. Simulation in the Multisim software show the sine signal source achieve the frequency, magnitude and the adjustable output waveform stability, the pulse signal source to achieve the source frequency, magnitude, adjustable duty cycle and highquality waveforms. [Key words]Sine wave, Pulse wave,RC bridge oscillations,555,Multisim III 目 錄 一、 引言 ............................................................................................................................ 1 （一） 課題設(shè)計(jì)要求 .............................................................................................. 1 正弦波信號源 ............................................................................................ 1 脈沖波信號源 ............................................................................................ 2 （二）信號源研究狀況 ........................................................................................... 2 （三）課題研究方法 ............................................................................................... 3 二、方案分析 .................................................................................................................... 3 （一）正弦信號源 ................................................................................................... 3 振蕩電路工作原理 .................................................................................... 4 橋式振蕩電路的組成 ................................................................................ 6 （二）脈沖信號源 ................................................................................................. 13 555 定時(shí)器工作原理 ............................................................................... 14 矩形脈沖電路組成 .................................................................................. 16 三、方案實(shí)現(xiàn) .................................................................................................................. 18 （一） RC 橋式振蕩電路 ...................................................................................... 18 （二）矩形脈沖電路 ............................................................................................. 19 四、電路仿真 .................................................................................................................. 21 （一）仿真軟件 ..................................................................................................... 21 （二）仿真過程 ..................................................................................................... 22 正弦波電路仿真 ...................................................................................... 22 矩形波電路仿真 ...................................................................................... 24 （三）數(shù)據(jù)測量與分析 ......................................................................................... 26 五、結(jié)論 .......................................................................................................................... 29 參 考 文 獻(xiàn) .................................................................................................................... 30 致 謝 .............................................................................................................................. 31 1 實(shí)用信號源的設(shè)計(jì)與仿真 一、 引言 隨著電子技術(shù)的迅速發(fā)展， 電子信息系統(tǒng)在我們的生活中越來越重要。本設(shè)計(jì)中的正弦信號源采用正弦波振蕩器來產(chǎn)生，這樣的振蕩電路有很多種，經(jīng)過分析比較采用 RC 正弦波振蕩電路， 即 RC 橋式振蕩電路或文式橋振蕩電路。 本畢業(yè)論文（設(shè)計(jì)）成果歸蘭州商學(xué)院所有。 蘭 州 商 學(xué) 院 本科生畢業(yè)論文（設(shè)計(jì)） 論文（設(shè)計(jì)）題目： 實(shí)用信號源的設(shè)計(jì)與仿真 學(xué) 院、 系： 信 息工程學(xué)院 計(jì)算機(jī)科學(xué)與技術(shù)系 專 業(yè) (方 向 )： 電子信息工程 年 級、 班： 2021 級 學(xué) 生 姓 名： 尉芳軍 指 導(dǎo) 教 師： 彭會(huì)萍 _2021_年 5 月 29 日 聲 明 本人鄭重聲明：所呈交的畢業(yè)論文（設(shè)計(jì)）是本人在導(dǎo)師的指導(dǎo)下取得的成果。 特此聲明 畢業(yè)論文（設(shè)計(jì)）作者簽名： 年 月 日 I 實(shí) 用信號源的設(shè)計(jì) 與仿真 摘 要 信號源又稱信號發(fā)生器，在生產(chǎn)實(shí)踐和科技領(lǐng)域中有著廣泛的應(yīng)用。該種振蕩電路是以 RC 串并聯(lián)電路作為選頻網(wǎng)絡(luò)的電路，可以產(chǎn)生滿足頻率幅