LC振荡器设计

课程设计

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电子与信息工程学院

信息与通信工程系

目录

摘要..................................................... - 2 -Abstract..................................................... - 2 -引言..................................................... - 3 -1 概述....................................................... - 4 -

1.1反馈式正弦波振荡器的基本工作原理 (4)

1.2振荡器必须满足条件 (4)

1.2.1 起振条件................................................................................................................................................................. - 4 -

1.2.2 平衡条件................................................................................................................................................................. - 5 -

1.2.3 稳定条件................................................................................................................................................................. - 5 -

2 硬件设计——西勒电路....................................... - 6 -

2.1西勒电路原理图 (6)

2.2西勒电路说明 (6)

2.3西勒电路静态工作点设置 (7)

2.4西勒电路参数设定 (8)

3 软件仿真................................................... - 9 -

3.1软件简介 (9)

3.2仿真波形 (10)

3.3仿真分析 (11)

4 结论...................................................... - 11 -

4.1设计的功能 (11)

4.2设计不足 (11)

4.3心得体会 (12)

参考文献.................................................... - 12 -致谢......................................... 错误!未定义书签。

振荡器是一种不需要外加激励、电路本身能自动地将直流能量转换为具有某种波形的交流能量的装置。种类很多，使用范围也不相同，但是它们的基本原理都是相同的，即满足起振、平衡和稳定条件。通过对电感三点式振荡器（哈脱莱振荡器）、电容三点式振荡器（考毕兹振荡器）以及改进型电容反馈式振荡器（克拉波电路和西勒电路）的分析，根据课设要求频率稳定度10-4,西勒电路具有频率稳定性高，振幅稳定，频率调节方便，适合做波段振荡器等优点,因此选择西勒电路进行设计。继而通过Multisim设计电路与仿真。

关键词：振荡器；西勒电路；Multisim

Abstract

The oscillator is a kind of don't need to motivate, circuit itself automatically device for DC energy into a waveform AC energy applied. Many different types of oscillators, using range is not the same, but the basic principles are the same, to meet the vibration, the equilibrium and stability conditions. Based on the inductance of the three point type oscillator ( Hartley), three point capacitance oscillator ( Colpitts) and improved capacitor feedback oscillator (Clapp and Seiler) analysis, according to class requirements, Seiler circuit with high frequency stability, amplitude stability frequency regulation, convenient, suitable for the band oscillator etc., so the final choice of Seiler circuit design. Then through the Multisim circuit design and simulation.

Key Words：Oscillator; Seiler; Multisim