基于Multisim11的压控振荡电路仿真设计

The design is based on the contents of the voltage controlled oscillator circuit simulation Multisim11 designed to explain the principles of the VCO circuit structure and composition.The design of an integrated operational amplifier is composed of 741 chips, and the hysteresis comparator reverse integration circuit using a diode 1N4148 equivalent electronic switch, control charge and discharge time of the capacitor, voltage controlled oscillation circuit, enabling the input voltage control of the output frequency variation. As long as the input voltage changes, the output terminal can change the output frequency. And create integrated VCO circuit module in the circuit design and simulation platform Multisim11 simulation environment, and then use them Multisim simulation tools to achieve the objectives and requirements of simulation design.
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摘
Multisim是美国国家仪器有限公司推出的以Windows为基础的仿真工具，适用于初级的模拟及数字电路板的设计工作，Multisim不仅具有丰富的仿真分析能力，而且还包含了电路原理图的图形输入及电路硬件描述语言的输入方式。有了Multisim软件就相当于有了一个电子实验室，可以非常方便的从事各种电路设计及仿真分析工作。
关键词：Multisim，压控振荡器，1N4148
Abstract
National Instruments Multisim is introduced in Windows-based simulation tool for primary analog and digital circuit board design, Multisim simulation analysis not only has the ability to enrich it, and also includes a circuit schematic graphical input and input circuit hardware description language. With Multisim software has the equivalent of an electronic laboratory can be very convenient to a variety of circuits in the design, simulation and analysis.
随着无线通信技术的快速发展，使得市场对压控振荡电路产生了巨大的需求。压控振荡器是通过调节可变电阻或电容可以改变波形的振荡频率，一般是通过人工来调节的。而在自动控制场合往往要求能自动地调节振荡频率。常见的情况是给出一个控制电压，要求输出波形的振荡频率与控制电压成正比。这种电路称为压控振荡器。
本次设计的内容是基于Multisim11的压控振荡电路仿真设计，阐述了压控振荡器的电路原理以及组成结构。本次设计是采用集成运算放大器741芯片组成的滞回电压比较器和反向积分电路，利用二极管1N4148相当于电子开关的功能，控制电容的充放电时间，构成的压控振荡电路，从而实现输入电压对输出频率变化的控制。只要改变输入端的电压，就可以改变输出端的输出频率。并在电路设计与仿真平台Multisim11仿真环境中创建集成压控振荡器电路模块，进而使用Multisim仿真工具对其进行仿真从而达到设计的目的和要求。
With the rapid development of wireless communication technology, making the market for a voltage controlled oscillator circuit generates a huge demand. By adjusting the voltage controlled oscillator is a variable resistor or capacitor can change the oscillation frequency of the waveform is generally adjusted by the manual.In the automatic control applications often require the oscillation frequency can be automatically adjusted. Common case is given a control voltage and oscillation frequency control voltage required is proportional to the output waveform. This circuit is calledVCO.
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基于Multisim11的压控振荡电路仿真设计
所在学院
机械与电气工程学院
专业
电气工程及其自动化
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指导老师
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