方波、正弦波振荡器概述.docx

编号： 课程设计说明书 题 目： 10MHZ正弦波/方波振荡器 院 （系）： 信息与通信学院 专 业： 通信工程 学生姓名： 施宇恒 学 号： 1100210624 指导教师： 刘争红 2014 年 12 月 11 日 摘 要 石英晶体振荡器，石英谐振器简称为晶振，它是利用具有压电效应的石英晶体片制成的。这种石英晶体薄片受到外加交变电场的作用时会产生机械振动，当交变电场的频率与石英晶体的固有频率相同时，振动便变得很强烈，这就是晶体谐振特性的反应。利用这种特性，就可以用石英谐振器取代LC(线圈和电容)谐振回路、滤波器等。由于石英谐振器具有体积小、重量轻、可靠性高、频率稳定度高等优点，被应用于家用电器和通信设备中。石英谐振器因具有极高的频率稳定性，故主要用在要求频率十分稳定的振荡电路中作谐振元件。 本设计对利用石英晶体构成正弦波的振荡器和方波振荡器的方法做了较深入的研究，对振荡器的原理及石英晶体振荡器原理做了详细的介绍并通过Multisim 软件设计、仿真出并联的石英晶体振荡器，最后按照原理图进行调试和参数的计算。 关键词：石英； 晶振； 压电效应； 频率稳定性； Multisim 仿真 ABSTRACT Quartz crystal oscillator, quartz resonator crystals for short, it is to use with piezoelectric effect of quartz crystal.This kind of quartz crystal wafer is plus alternating electric field will produce the effect of mechanical vibration, when the frequency of the alternating electric field and the natural frequency of the quartz crystal phase at the same time, the vibration will become very strong, this is crystal resonant characteristics of the reaction.Using this feature, you can use quartz resonator instead of LC (coil and capacitance) resonant circuit, filter, etc.Because of the quartz resonator has small volume, light weight, high reliability, high frequency stability, is applied to household appliances and communications equipment.Quartz resonator due to the high frequency stability, and is mainly used for frequency is very stable in the oscillation circuit for harmonic components. This design for the method of using quartz crystal constitute a sine wave oscillator done deeper research, on the principle of oscillator and principle of quartz crystal oscillator is introduced in detail and by Multisim 10 software design, simulation parallel quartz crystal oscillator, finally according to the principle diagram for debugging and parameter calculation Keywords: quartz; quartz crystal; piezoelectric effect; frequency stability