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题 目：高频电容三点式正弦波振荡器

目 录

摘要……………………………………………………………………………………I Abstract………………………………………………………………………………Ⅱ 1 绪论…………………………………………………………………………………1 2 设计原理说明………………………………………………………………………2 2.1 反馈振荡器的原理……………………………………………………………2 2.1.1 原理分析…………………………………………………………………2 2.1.2 平衡条件…………………………………………………………………3 2.1.3 起振条件…………………………………………………………………3 2.2 电容三点式振荡器……………………………………………………………4 2.3 设计原理………………………………………………………………………5 3 电路设计与调试……………………………………………………………………6 3.1单元电路设计…………………………………………………………………6 3.1.1 电容三点式振荡单元……………………………………………………6 3.1.2 输出缓冲级单元…………………………………………………………8 3.2 电路调试………………………………………………………………………9 4 心得体会…………………………………………………………………………10参考文献……………………………………………………………………………11 附录一：元件清单……………………………………………………………………12 附录二：总电路图……………………………………………………………………13 附录三：实物图………………………………………………………………………14

摘 要

近些年信息通信领域中,发展最快、应用最广的就是无线通信技术。无线通 信的终极目标是实现任何人在任何时间、任何地点接受和发送任何信息。掌握无 线通信系统的各个模块工作原理是每一个通信技术学习及研究人员的基本要求。 在一个完整的无线通信系统中,主要有放大、滤波、调制、发射、接受、混频、 解调等功能模块,我们要做的,就是充分理解和掌握这些功能模块的工作过程, 并能够进行相应的电路设计。

本次课设要求制作高频电容三点式正选拨振荡器，采用晶体三极管或集成电路，场效应管构成正弦波振荡器，达到任务书所要求的目标。并介绍了设计步骤，比较了各种设计方法的优缺点，总结了不同振荡器的性能特征。使用实验要求的电源和频率计进行验证，实现了设计目标。

关键字：无线通信 高频信号 正弦波 振荡器

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Abstract

In recent years in the field of information and communication, the fastest growing, most widely used wireless communication technology. The ultimate goal of wireless communication to anyone at any time, any place to accept and send any information. Grasp the working principle of the various modules of the wireless communication system is a basic requirement for each communication technology learning and researchers. In a wireless communication system, amplification, filtering, modulation, transmitter, accept, mixer, demodulation function modules, we need to do is to fully understand and master the process of the work of these functional modules, and the ability to carry out circuit design.

The class-based production of high-frequency capacitance three-point positive selection of new oscillator using transistors or integrated circuits, FET constitute a sine wave oscillator, to achieve the required goals of the mission statement. And describes the design step, comparing the advantages and disadvantages of various design methods, summarizes the different performance characteristics of the oscillator. Using the power of the experimental requirements and frequency meter to verify design goals.

Keywords: wireless communication High-frequency signal sine wave oscillator

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