基于集成压控振荡器的调频电路仿真分析

LM566是一种积分-施密特触发电路型的单片集成 VCO 芯片，在调频电路的教学中作为调制器和解调器，通过对其芯片的仿真，可以在软件平台形象的展示其工作特点，便于定量分析。由于Multisim元件库里没有LM566所需模型，为实现LM566在Multisim12仿真环境中的建模，首先，运用Multisim元件库中现有的基本元件模型，构建LM566芯片内部结构；然后，对外围调频电路的静态工作方式和动态工作方式的分析；最后，实验结果表明，给出的芯片模型能够客观的描述LM566的基本特性，为运用该芯片完成包括调频电路在内的各种功能电路的仿真分析奠定了基础，有效扩展了Multisim仿真软件的使用范围，具有一定的借鉴意义。

FM Circuit Design and Simulation Analysis Based on Integrated VCO

LM566 is a kind of Monolithic integrated VCO chips of integral – schmidt trigger circuit type. It plays the role of mod-ulator and demodulator in the FM teaching. By simulation of its chip, the feature of its work can be vitally showed on the software platform, which is convenient for conducting quantitative analysis. Since there are not any models in the Multisim library that LM566 requires, in order to build up the LM566 modeling in Multisim12 simulation environment, the paper firstly establishes LM566’s chip internal structure. Then it analyzes the static and dynamic work of peripheral frequency modulation circuit.; it is indicated in the end that the chips model provided can objectively describe the basic character of LM566. It laids a solid founda-tion for chips using to complete simulation analysis of various functional circuit like FM and effectively expands Multisim’s range of application. So it has certain reference significe.