高频信号发生器(西勒振荡).doc

实用标准文案 精彩文档 摘要 本报告主要介绍了高频信号发生器的设计与制作。高频信号发生器主要用来向各种电子设备和电路提供高频能量或高频标准信号，以便测试各种电子设备和电路的电气特性，应用广泛。高频信号发生器主要是产生高频正弦震荡波，故电路主要是由高频振荡电路构成。振荡器的功能是产生标准的信号源。正弦波振荡器是以放大器为基础再加正反馈网络组成的，也可以看作是由放大电路、选频网络和反馈网络三部分所组成的。根据本次题目要求，本次方案主要设计制作完成一路正弦波信号输出的高频振荡器，介绍了设计步骤，比较了各种设计方案的优缺点，总结了不同振荡器的性能特征。基本完成实现了设计目标。 关键词：高频信号发生器 、高频振荡器 、 放大网络、选频网络 Abstract This report mainly describes the design and fabrication of high frequency signal generator.High frequency signal generator is mainly used to all kinds of electronic equipment and circuit with high frequency energy or standard signal, in order to test various electronic equipment and circuit of electric properties, is widely used.The high frequency signal generator is mainly produces high frequency sinusoidal vibration waves, so the circuit is mainly composed of a high frequency oscillating circuit.The oscillator is function of standard signal source.Sine wave oscillator is coupled with positive feedback amplifier based network composition, can also be viewed as the amplifying circuit, a frequency selecting network and feedback network which consists of three parts.According to the topic request, this scheme is designed to complete a sine-wave signal output from the high frequency oscillator, introduces the design steps, compares the advantages and disadvantages of various design schemes, summarizes the characteristics of different oscillator.Basically completed to achieve the design goal. Keywords：High frequency signal generator, A high-frequency oscillator, amplifier, A frequency selecting network network 1 引言 设计并制作一台高频函数信号发生器完成以下几项要求 （1）制作完成一路正弦波信号输出，频率范围6MHz～7MHz； （2）输出信号频率稳定度优于10-4，用示波器观察时无明显失真； （3）输出电压幅度：电压峰-峰值Vopp≥1V； 2 总体方案设计 2.1方案设计思路 高频函数信号发生器输出正弦波信号的方法有数字方法和模拟方法，数字方法是通过数字电路产生方波，再通过滤波输出正弦波。而模拟方法是通过振荡电路输出正弦波信号。考虑到题目要求本次方案选用的是模拟方法输出正弦波较合适。而在模拟电路振荡器中有LC振荡器、RC振荡器、石英振荡器三种方案可供选择。经分析，RC正弦波振荡器频率在1Hz-1MHz范围内，不符合设计要求。石英正弦波振荡器因其频率不可调同样不可取。所以本方案选择LC正弦波振荡器，基本符合设计要求。LC正弦波振荡器有三种振荡器，分别为考毕兹振荡器、克拉泼振荡器、西勒振荡器。下面对这三份方案分别进行论证并比较。 2.2方案比较与论证 2.2.1电容三点式振荡器 电